Victron EasySolar-II GX: Integrated Inverter Charger & Solar Controller Manual

2. Safe Installation

⚠️ DANGER OF ELECTRICAL SHOCK

This product operates with a permanent energy source (battery). Dangerous electrical voltages can be present at terminals even when the product is switched off. Always switch off AC power and disconnect the battery before performing maintenance. The product contains no user-serviceable parts. Do not remove panels or operate with panels removed. All maintenance must be performed by qualified personnel.

Never use the product where gas or dust explosions could occur. Ensure batteries are suitable for use with this product and always observe battery manufacturer safety instructions.

This product is not intended for use by persons with reduced physical, sensory, or mental capabilities, or lack of experience, unless supervised or instructed by a safety-responsible person. Children should be supervised to ensure they do not play with the product.

2.1. Transport and Storage

Disconnect mains supply and battery leads during storage or transport. Use original packaging for transit. Store in a dry environment between -20°C and 60°C. Refer to battery manual for battery transport, storage, charging, and disposal.

Protect solar modules from light during installation (e.g., cover them). Never touch uninsulated cable ends. Use only insulated tools.

2.2. Grounding

Battery Grounding: This device can be installed in positive or negative grounded systems. Apply a single ground connection, preferably near the battery, to prevent system malfunction.

Chassis Grounding: A separate earth path for the chassis ground is permitted as it is isolated from the positive and negative terminals.

USA National Electrical Code (NEC): Requires an external ground fault protection device (GFPD). These MPPT chargers lack internal GFPD. The system electrical negative should be bonded through a GFPD to earth ground at one location only.

PV Array Grounding: The charger must not be connected with grounded PV arrays (one ground connection only). The positive and negative of the PV array should not be grounded. Ground the frame of the PV panels to reduce lightning impact.

⚠️ WHEN A GROUND FAULT IS INDICATED, BATTERY TERMINALS AND CONNECTED CIRCUITS MAY BE UNGROUNDED AND HAZARDOUS.

3. Product Description

The EasySolar-II GX integrates a powerful sine inverter, battery charger, and transfer switch in a compact casing, suitable for marine, automotive, and stationary land-based applications.

3.1. Features applying to all applications

3.1.1. GX LCD display

A backlit 2x16 character display shows system parameters.

3.1.2. BMS-Can Connections

Allows connection of compatible 500 kbps CAN-bus BMS batteries. VE.Can products (e.g., Victron MPPT Solar Chargers, Lynx Shunt VE.Can) are NOT supported.

3.1.3. Ethernet and WiFi

Enable local and remote system monitoring, and connection to Victron's free VRM portal for long-term performance data.

3.1.4. Automatic and uninterruptible switching

Solves the problem of grid-connected sustainable energy sources dropping out during a power failure. The product replaces the grid, using surplus solar power to charge batteries or supplying power from batteries during shortfalls.

3.1.5. Two AC outputs

AC-out-1: Standard uninterruptible output.

AC-out-2: Auxiliary output that disconnects its load during battery-only operation (e.g., an electric boiler that should only run when grid or generator power is available).

3.1.6. Three phase capability

Units can be connected and configured for three-phase output, with up to 6 sets in parallel across three phases (18 units total).

3.1.7. PowerControl maximum use of limited AC power

Allows setting a maximum AC input current. The product prioritizes other power users and uses only 'surplus' current for charging.

3.1.8. PowerAssist Extended use of generator or shore current

Supplements the capacity of the alternative AC source. It compensates for insufficient mains or generator power with battery power during peak demand, and recharges the battery when the load reduces.

3.1.9. Programmable

All settings can be changed using free PC software downloadable from www.victronenergy.com. Refer to the VEConfigure Manual for details.

3.1.10. Programmable relay

Equipped with a programmable relay for applications like a generator starter relay.

3.1.11. External current transformer (option)

Used for PowerControl and PowerAssist with external current sensing.

3.1.12. Programmable analog/digital input/output ports (Aux in 1 and Aux in 2)

These ports can be used for various purposes, including communication with BMS controls for lithium-ion batteries.

3.2. Features specific on-grid and off-grid systems combined with PV

3.2.1. External current transformer (optional)

Required for grid-parallel topologies when the internal transformer cannot measure mains current. See Appendix A.

3.2.2. Frequency shift

When solar inverters are connected, excess solar energy charges batteries. Once absorption voltage is reached, surplus energy feeds back to the grid. If the grid is unavailable, the product slightly increases AC frequency to reduce solar inverter output.

3.2.3. Built-in Battery Monitor

Ideal for hybrid systems. Can be configured to start/stop a generator based on preset discharge levels, battery voltage, or load levels.

3.2.4. Autonomous operation when the grid fails

As described in 3.1.4, this feature ensures continuous power supply during grid outages by managing solar, battery, and AC sources.

3.3. Battery charger

3.3.1. Lead-acid batteries

Features an adaptive 4-stage charge algorithm: Bulk, Absorption, Float, Storage. The system adapts to battery usage, adjusting absorption time based on discharge depth. BatterySafe mode prevents damage from excessive gassing. Storage mode minimizes maintenance and aging when the battery is idle by reducing float voltage and periodically equalizing.

Battery voltage sense compensates for cable resistance. Battery voltage and temperature compensation reduces charging voltage as battery temperature rises.

3.3.2. Li-ion batteries

For Victron LiFePO4 Smart batteries, use the VE.Bus BMS.

3.3.3. Other Li-ion batteries

Refer to https://www.victronenergy.com/live/battery_compatibility:start for compatibility information.

3.3.4. More on batteries and battery charging

Further information is available in the book 'Energy Unlimited' and on the Victron Energy website.

3.4. ESS Energy Storage Systems: feeding energy back into the grid

To feed energy back into the grid, grid code compliance must be enabled using the VEConfigure tool, selecting the appropriate grid code country. A password is required to disable compliance or change grid code parameters.

Depending on the grid code, various reactive power control modes are available:

Fixed cos φ
Cos φ as a function of P
Fixed Q
Q as a function of input voltage

Figure 1: Reactive Power Capability

This diagram illustrates the relationship between Real Power (P) and Reactive Power (Q) relative to the maximum apparent power (Smax). It shows operating regions defined by limits such as 0.75 PD (maximum real power output) and 0.1 Smax (minimum reactive power output), and the capability to operate at fixed cos φ or fixed Q values.

If the local grid code is not supported, an external certified interface device is required. The product can also function as a bidirectional inverter in custom-designed systems.

Special notes regarding NRS-097 (South Africa):

Maximum allowed network impedance: 0.28 + j0.18.
The inverter fulfills the unbalance requirement for multiple single-phase units only when a GX device is part of the installation.

Special notes regarding AS 4777.2 (Australia/New Zealand):

Certification for off-grid use does not imply approval for grid-interactive installations. Additional certification (IEC 62109.2, AS 4777.2.2015) is required. Check the Clean Energy Council website for current approvals.
DRM (Demand Response Mode): When the AS4777.2 grid code is selected in VEConfigure, DRM 0 functionality is available on port AUX1. A resistance between 5kΩ and 16kΩ between AUX1 terminals enables grid connection. Open or short circuits disconnect the product. Maximum voltage between AUX1 terminals is 5V. DRM 0 can be disabled in VEConfigure.

8. Installation

⚠️ This product contains potentially dangerous voltages. Installation should only be performed by a qualified installer under supervision, adhering to local requirements. Contact Victron Energy for training if needed.

8.1. Location

Install in a dry, well-ventilated area, as close to the batteries as possible. Maintain at least 10 cm clearance around the product for cooling. High ambient temperatures reduce service life, charging current, and peak capacity, potentially causing shutdown.

Never position the appliance directly above batteries. It is suitable for wall mounting on a solid surface (concrete, masonry). Hooks and holes are provided at the rear for mounting (see Appendix G). Vertical fitting is preferred for optimal cooling. The interior must remain accessible after installation.

Minimize distance between product and battery to reduce cable voltage losses. Install in a heat-resistant environment, away from chemicals, synthetic components, curtains, or textiles.

8.2. Connection of battery cables

Use batteries with sufficient capacity and battery cables with adequate cross-section. Recommended specifications:

Model	Recommended Battery Capacity (Ah)	Recommended DC Fuse	Recommended Cross Section (mm²) per + and - terminal (0-5m)	Recommended Cross Section (mm²) per + and - terminal (5-10m)
24/3000/70	200-800	300 A	50 mm²	95 mm²
48/3000/35	100-400	125 A	35 mm²	70 mm²
48/5000/70	200-800	200 A	70 mm²	2x70 mm²

Remark: Internal resistance is critical for low-capacity batteries. Consult your supplier or 'Energy Unlimited' for details.

8.3. Battery Connection Procedure

Use a torque wrench with an insulated box spanner to avoid shorting the battery.
Avoid shorting battery cables.
Confirm correct polarity with a multimeter before connecting. Incorrect polarity will destroy the device and void the warranty.
Connect battery cables: first the negative (-) cable, then the positive (+) cable. Expect a spark when making connections.
Tighten nuts to prescribed torques for minimal contact resistance.

8.4. Connection of the PV array

Confirm correct PV polarity.
Remove the Solar connection cover.
Connect the solar array to the M6 solar bolts.

NOTE: If connected with reverse polarity, PV voltage will drop, the controller will heat up, but will not charge the battery.

8.5. Connection of the AC cabling

This is a Safety Class I device for TN systems, requiring uninterruptible grounding at AC input/output terminals. An additional grounding point bonded to the chassis is inside the terminal cover (see Appendix A).

In fixed installations, grounding can be via the AC input's grounding wire. Otherwise, the casing must be grounded.

A ground relay (relay H, Appendix B) automatically connects the AC output Neutral to the chassis if no external AC supply is available. If AC supply is present, the ground relay opens before the input safety relay closes, ensuring correct operation of earth leakage circuit breakers.

In mobile installations (e.g., shore power plug), interrupting the shore connection disconnects grounding. The casing must then be connected to the vehicle chassis or boat hull/grounding plate. For boats, direct connection to shore ground is not recommended due to galvanic corrosion; use an isolation transformer.

Terminal blocks are on the printed circuit board (see Appendix A).

Do not invert neutral and phase when connecting AC.

AC-in

Connect the AC input cable to the 'AC-in' terminal block: "N" (neutral), "PE" (earth/ground), "L" (phase) from left to right. The AC input must be protected by a fuse or magnetic circuit breaker rated at 32A or less, with appropriately sized cable cross-section. If the input AC supply is rated lower, downsize the protection accordingly.

AC-out-1

Connect the AC output cable to the 'AC-out' terminal block: "N" (neutral), "PE" (earth/ground), "L" (phase) from left to right. With PowerAssist, the Multi can add up to its rated power (e.g., 3000VA / 230V ≈ 13A) to the output during peak demand. Combined with a maximum input current of 32A, the output can supply up to 45A. An earth leakage circuit breaker and a fuse/circuit breaker rated for the expected load must be included, with appropriately sized cable cross-section.

AC-out-2

A second output disconnects its load during battery operation. Connect equipment here that should only operate when AC voltage is available on AC-in-1 (e.g., an electric boiler or air conditioner). The load on AC-out-2 disconnects immediately when the inverter/charger switches to battery operation. After AC power is restored to AC-in-1, the load on AC-out-2 reconnects after a delay of approximately 2 minutes to allow a genset to stabilize.

8.6. Optional Connections

8.6.1. Remote Control

Can be controlled remotely via:

An external switch (terminal M, Appendix A). Operates only if the device switch is set to "on".
A Digital Multi Control panel (connected to RJ45 socket L, Appendix A). Operates only if the device switch is set to "on". The panel allows setting the AC input maximum current for PowerControl and PowerAssist.

8.6.2. Programmable relay

Can be programmed for various applications, such as a generator starter relay.

8.6.3. Programmable analog/digital input/output ports

Two ports available for purposes like communication with BMS controls for lithium-ion batteries.

8.6.4. Voltage sense (connection terminal J, Appendix A)

Two sense wires can compensate for cable losses during charging by measuring voltage directly on the battery or distribution points. Use 0.75mm² wire. The inverter/charger compensates for voltage drop up to 1V (total for positive and negative connections). If the drop exceeds 1V, charging current is limited.

8.6.5. Temperature sensor (connection terminal J, Appendix A)

Connect the supplied sensor for temperature-compensated charging. It is isolated and must be fitted to the negative battery terminal.

8.6.6. Parallel Connection

Requires identical units (aside from the GX part) with the same firmware. Up to six units can be paralleled. For parallel and three-phase systems, it is recommended to use MultiPlus-II models without a built-in GX and an external GX device. Essential requirements include connecting the negative battery terminal between units (no fuse/breaker on negative), all units connected to the same battery, DC cables of equal length/cross-section, and UTP cables connected directly between units (no splitters).

8.6.7. Three-phase operation

Can be used in a 3-phase wye (Y) configuration using standard RJ45 UTP cables for inter-device connection. Requires subsequent configuration. Not suitable for 3-phase delta (Δ) configuration. When AS4777.2 grid code is selected, only 2 units per phase are allowed in a three-phase system. Consult your Victron distributor and specific manuals for full details.

8.6.8. Connection to the VRM Portal

Requires an internet connection via Wi-Fi or Ethernet. The VRM site ID is on a sticker inside the cable connection area. Refer to the VRM Getting Started Manual for setup.

8.7. GX - How to update firmware

8.7.1. Changelog

Available in Victron Professional under Firmware, Venus OS.

8.7.2. Via internet or with microSD-card/USB-stick

Firmware can be updated via the internet (manual check or daily check) or from a microSD-card/USB-stick (offline update).

8.7.3. Direct download from the internet

Navigate to: Settings -> Firmware -> Online updates. For GX devices without a display, use Remote Console.

8.7.4. MicroSD-card or USB-stick

Step 1. Download: Get the latest swu file (e.g., venus-swu-nanopi.swu) from Victron Professional.

Step 2. Install: Store the file in the root folder of a USB-stick or microSD-card.

Step 3. Insert: Insert the media into the device. A warning about not using media for logs can be ignored.

Step 4. Initiate update: Navigate to Settings -> Firmware -> Offline updates. Press "Check for updates". If a newer firmware is found, "Update available" will appear; press it to start.

9. Configuration

This section is mainly for stand-alone applications. For grid-connected ESS, see https://www.victronenergy.com/live/ess:start. Settings should only be changed by a qualified installer. Read instructions thoroughly before implementing changes. Remove AC input during charger setting.

9.1. Standard settings: ready for use

On delivery, the product is set to standard factory values, generally suitable for single-unit operation. The standard battery charging voltage may not be suitable for all batteries; refer to manufacturer documentation.

Setting	Value
Inverter frequency	50 Hz
Input frequency range	45 – 65 Hz
Input voltage range	180 – 265 VAC
Inverter voltage	230 VAC
Stand-alone / parallel / 3-phase	stand-alone
AES (Automatic Economy Switch)	off
Ground relay	on
Charger on / off	on
Battery charge curve	four-stage adaptive with BatterySafe mode
Charging current	100% of the maximum charging current
Battery type	Victron Gel Deep Discharge (also suitable for Victron AGM Deep Discharge)
Automatic equalisation charging	off
Absorption voltage	28.8 V / 57.6 V
Absorption time	up to 8 hours (depending on bulk time)
Float voltage	27.6 V / 55.2 V
Storage voltage	26.4 V / 52.8 V (not adjustable)
Repeated absorption time	1 hour
Absorption repeat interval	7 days
Bulk protection	on
AC input current limit	32A for 3kVA model and 50A for 5kVA model (adjustable for PowerControl and PowerAssist)
UPS feature	on
Dynamic current limiter	off
WeakAC	off
BoostFactor	off
Programmable relay	2 alarm function
PowerAssist	on

9.2. Explanation of settings

Settings not self-explanatory are briefly described below. Refer to VEConfigure help files for more information.

Inverter frequency

Output frequency when no AC is present. Adjustable: 50 Hz; 60 Hz.

Input frequency range

Accepted input frequency range for synchronization. Adjustable: 45–65 Hz; 45–55 Hz; 55–65 Hz.

Input voltage range

Accepted input voltage range for synchronization. Lower limit: 180–230 V. Upper limit: 230–270 V. Note: The standard lower limit of 180V is for weak mains or unstable generators. Increasing to 210VAC or disconnecting the product from the generator upon stop signal may be necessary for synchronous AVR generators.

Inverter voltage

Output voltage in battery operation. Adjustable: 210–245 V.

Stand-alone / parallel operation / 2-3 phase setting

Configures the system for single device, parallel operation (increased power), split-phase (with autotransformer), or 3-phase operation.

AES (Automatic Economy Switch)

If 'on', reduces no-load and low-load power consumption by approx. 20% by narrowing the sinusoidal voltage. Applicable in stand-alone configuration only.

Search Mode

Alternative to AES. Reduces no-load power consumption by approx. 70%. The inverter switches off at no/low load and switches on briefly every two seconds. If output current exceeds a set level, it remains on. Load levels for 'shut down' (default 40W) and 'turn on' (default 100W) can be set with VEConfigure.

Ground relay (see appendix B)

Grounds the AC output neutral to the chassis when back feed safety relays are open, ensuring earth leakage circuit breaker operation. An external ground relay can be connected for split-phase systems.

Battery charge algorithm

Default is 'Four-stage adaptive with BatterySafe mode', recommended for lead-acid batteries. Other features available in VEConfigure.

Battery type

Default setting is suitable for Victron Gel Deep Discharge, Gel Exide A200, and tubular plate stationary batteries (OPzS). Can be adjusted in VEConfigure for other types (Nickel Cadmium, Lithium-ion).

Absorption time

For the adaptive curve, absorption time depends on bulk time for optimal charging. Maximum absorption time is adjustable.

9.2.1. Equalisation

Traction batteries require regular additional charging. In equalisation mode, voltage increases (e.g., 4V for 48V battery) for one hour, with charging current limited to 1/4 of the set value. DC consuming devices must be disconnected before equalisation.

Automatic equalisation charging

Intended for flooded tubular plate traction or OPzS batteries. During absorption, voltage increases to 2.83V/cell (68V for 48V battery) after charge current drops below 10% of maximum. See 'tubular plate traction battery charge curve' in VEConfigure.

Storage voltage, Repeated Absorption Time, Absorption Repeat Interval

See Appendix E.

Bulk Protection

If 'on', limits bulk charging time to 10 hours to detect system errors (e.g., battery cell short-circuit). This mode is on by default and can be switched off via VEConfigure.

AC input current limit

Sets current limits for PowerControl and PowerAssist. Range: 3.7A min to 32A max for 3kVA models; 5.7A min to 50A max for 5kVA models. Factory setting is the maximum value.

UPS feature

If 'on', switches to inverter operation with minimal interruption when AC input fails. Can be turned off if the product continually switches to inverter operation due to unstable generator voltage. Switchover time is slightly longer but may be more compatible with certain equipment or generators.

Dynamic current limiter

Intended for 'inverter' generators. Allows the device to supply extra power at low generator output, gradually increasing load as the generator engine speeds up. Prevents voltage drops during sudden load increases. Also useful for 'classical' generators with slow response to load variations.

Weak AC

Accepts strongly distorted AC input voltage, at the cost of increased input current distortion. Turn on if the charger is barely charging or not charging at all. Recommended to use simultaneously with the dynamic current limiter and reduce maximum charging current if necessary. Note: WeakAC reduces maximum charge current by approx. 20%.

BoostFactor

Adjusts PowerAssist behavior. Consult a Victron-trained specialist before modifying.

Programmable relay

Can be programmed for various applications, e.g., generator starter relay.

Auxiliary AC output (AC-out-2)

For non-critical loads. Default behavior: AC-out-2 active after a 30-second delay when AC input is detected. A current measurement circuit enables PowerAssist. Override programming is possible for more control.

9.3. Inverter/Charger

For detailed configuration of the Inverter/Charger component, refer to the MultiPlus-II manuals. Full programming requires VEConfigure on a laptop; limited configuration is possible with VictronConnect.

9.4. SmartSolar MPPT 250/70 charge controller

Configure using VictronConnect, preferably via Bluetooth (Android, iOS, macOS). For Windows, use a VE.Direct USB interface cable. Refer to the SmartSolar MPPT 250/70 documentation and VictronConnect manuals for complete details.

11. Error Indications

Most errors can be resolved using the procedures below. Contact your Victron Energy supplier if an error cannot be resolved.

11.1. General error indications

Problem	Cause in inverter mode	Solution
No output voltage on AC-out-2, even after waiting.	Circuit breaker or fuse in the AC-in input is open as a result of overload.	AC input is not connecting. Follow steps in MultiPlus generator FAQ.
Unit will not switch over to generator or mains operation.	The battery voltage is excessively high or too low. No voltage on DC connection.	Remove overload or short circuit on AC-out-1 or AC-out-2, and reset fuse/breaker.
Inverter operation not initiated when switched on.	The battery voltage is low.	Ensure that the battery voltage is within the correct range.
'Low battery'	The battery voltage is low.	Charge the battery or check the battery connections.
'Low battery' (Shutdown)	The converter switches off because the battery voltage is too low.	Charge the battery or check the battery connections.
Overload	The converter load is higher than the nominal load.	Reduce the load.
'Overload' (Shutdown)	The converter is switched off due to excessively high load.	Reduce the load.
'Over Temperature'	The environmental temperature is high, or the load is too high.	Install the converter in a cool and well-ventilated environment, or reduce the load.
'Low Bat V Overload' (Shutdown)	Low battery voltage and excessively high load.	Charge the batteries, disconnect or reduce the load, or install higher capacity batteries. Fit shorter and/or thicker battery cables.
'High DC Ripple'	Ripple voltage on the DC connection exceeds 1.5Vrms.	Check the battery cables and battery connections. Check whether battery capacity is sufficiently high, and increase this if necessary. Install batteries with a larger capacity. Fit shorter and/or thicker battery cables, and reset the inverter (switch off, and then on again).
'DC Ripple Shutdown'	The inverter is switched off due to an excessively high ripple voltage on the input.	Ensure that the AC input is between 185VAC and 265VAC, and that the frequency is within the range set (default setting 45-65 Hz).
The charger does not operate.	The AC input voltage or frequency is not within the range set.	Remove overload or short circuit on AC-out-1 or AC-out-2, and reset fuse/breaker.
The charger does not operate. 'Bulk Protection' shown.	Circuit breaker or fuse in the AC-in input is open as a result of overload. The battery fuse has blown. The distortion or the AC input voltage is too large (generally generator supply). EasySolar-II GX is in 'Bulk protection' mode thus, the maximum bulk charging time of 10 hours is exceeded. Such a long charging time could indicate a system error (e.g. a battery cell short-circuit).	Replace the battery fuse. Turn the settings WeakAC and dynamic current limiter on. Check your batteries. NOTE: You can reset the error mode by switching off and back on the EasySolar-II GX. The standard EasySolar-II GX factory setting of the 'Bulk protection' mode is switched on. The 'Bulk protection' mode can be switched off with help of VEConfigure only.
The battery is not completely charged.	Charging current excessively high, causing premature absorption phase.	Set the charging current to a level between 0.1 and 0.2 times the battery capacity.
	Poor battery connection.	Check the battery connections.
The battery is overcharged.	The absorption voltage has been set to an incorrect level (too low).	Set the absorption voltage to the correct level.
The charging current drops to 0 as soon as the absorption phase initiates.	The float voltage has been set to an incorrect level (too low). The available charging time is too short to fully charge the battery. The absorption time is too short. For adaptive charging this can be caused by an extremely high charging current with respect to battery capacity, so that bulk time is insufficient. The absorption voltage is set to an incorrect level (too high). The float voltage is set to an incorrect level (too high). Poor battery condition. The battery temperature is too high (due to poor ventilation, excessively high environmental temperature, or excessively high charging current). Defective battery temperature sensor The battery is over-heated (+50°C)	Select a longer charging time or higher charging current. Reduce the charging current or select the 'fixed' charging characteristics. Set the absorption voltage to the correct level. Set the float voltage to the correct level. Replace the battery. Improve ventilation, install batteries in a cooler environment, reduce the charging current, and connect the temperature sensor. Disconnect the temperature sensor plug in the EasySolar-II GX. If charging functions correctly after approximately 1 minute, the temperature sensor should be replaced. Install the battery in a cooler environment Reduce the charging current Check whether one of the battery cells has an internal short circuit

11.2. VE.Bus error codes

VE.Bus system error codes are displayed on the GX display. Refer to the VE.Bus error codes documentation for interpretation: https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes.

Code	Meaning	Cause/solution
1	Device is switched off because one of the other phases in the system has switched off.	Check the failing phase.
3	Not all, or more than, the expected devices were found in the system.	The system is not properly configured. Reconfigure the system. If the error persists, possible communication cable error. Check the cables and switch all equipment off, and then on again.
4	No other device whatsoever detected.	Check the failing unit. Check the communication cables.
5	Overvoltage on AC-out.	Check the AC cables.
10	System time synchronisation problem occurred.	Should not occur in correctly installed equipment.
14	Device cannot transmit data.	Check the communication cables (there may be a short circuit).
17	One of the devices has assumed 'master' status because the original master failed.	Check the failing unit. Check the communication cables.
18	Overvoltage has occurred.	Check AC cables. This device is an obsolete and unsuitable model. It should be replaced.
22	This device cannot function as 'slave'.	Check the communication cables.
24	Switch-over system protection initiated.	Should not occur in correctly installed equipment. Possible solution: increase lower limit of AC input voltage to 210 VAC (factory setting is 180 VAC).
25	Firmware incompatibility. The firmware of one of the connected devices is not sufficiently up to date to operate in conjunction with this device.	1) Switch all equipment off. 2) Switch the device returning this error message on. 3) Switch on all other devices one by one until the error message reoccurs. 4) Update the firmware in the last device that was switched on.
26	Internal error.	Should not occur. Switch all equipment off, and then on again. Contact Victron Energy if the problem persists.

12. Technical Specifications

12.1. Inverter/Charger

Specifications	24/3000/70-32	48/3000/35-32	48/5000/70-50
Model
PowerControl & PowerAssist	Yes	Yes	Yes
Transfer switch	32A 32A 50A
Maximum AC input current	32A 32A 50A
Auxiliary output	32A 32A 50A
Input voltage range	19 – 33V	38 – 66V	38 - 66V
INVERTER
Output voltage: 230 VAC ±2%
Frequency: 50 Hz ±0.1% (1)
Cont. output power at 25°C (3)	3000VA / 2400W	3000VA / 2400W	5000VA / 4000W
Cont. output power at 40°C / 55°C	2200W / 1700W	2200W / 1700W	3700W / 3000W
Maximum feed-in power	2470W / 3000VA	2470W / 3000VA	4400W / 5000VA
Peak power	5500W	5500W	9000W
Maximum efficiency	94%	95%	96%
Zero load power	13W	11W	18W
Zero load power in AES mode	9W	7W	12W
Zero load power in Search mode	3W	2W	2W
AC Input
Input voltage range: 187-265 VAC
Input frequency: 45 – 65 Hz
Charger
Charge voltage 'absorption'	28.8V	57.6V	57.6V
Charge voltage 'float'	27.6V	55.2V	55.2V
Storage mode	26.4V	52.8V	52.8V
Maximum battery charge current (4)	70A	35A	70A
Battery temperature sensor	Yes	Yes	Yes
Programmable (AUX) relay (5)	a-g
Protection (2)	For parallel and three phase operation, remote monitoring and system integration
VE.Bus communication port	Yes, 2x

12.2. SmartSolar MPPT Charge Controller

Specifications	SmartSolar MPPT 250/70-Tr	SmartSolar MPPT 250/100-Tr
Maximum output current	70A	100 A
Maximum PV power	24V: 2000W / 48V: 4000W	5800 W
Maximum PV open circuit voltage	250V
Maximum efficiency	99%
Self-consumption	20mA
Charge voltage 'absorption', default	57.6V
Charge voltage 'float', default setting	55.2V
Protection (2)	a-e

12.3. General

Specifications	Value
Interfaces	BMS-Can port (VE.Can not supported), USB, Ethernet, VE.Direct, Wi-Fi
Remote on-off	Yes
Operating temperature range	-20 to +45 °C (fan assisted cooling). Maximum Altitude 2000m
Humidity (non-condensing)	max 95%
Enclosure Material & Colour	Steel (blue RAL 5012)
Protection category	IP21
Pollution degree	Pollution degree 2, OVC3
Battery-connection	M8 bolts
PV Connection	M6 bolts
230 V AC-connection	Screw terminals 13 mm² (6 AWG)
Weight	24/3kVA - 26 kg 48/3kVA - 26 kg 48/5kVA - 38.6 kg
Dimensions (hxwxd)	3kVA - 499 x 268 x 237 mm 5kVA - 604 x 323 x 253 mm
Standards	Safety: EN-IEC 60335-1, EN-IEC 60335-2-29 Emission / Immunity: EN-IEC 62109-1, EN-IEC 62109-2, EN 55014-1, EN 55014-2, EN-IEC 61000-3-2, EN-IEC 61000-3-3, IEC 61000-6-1, IEC 61000-6-2, IEC 61000-6-3
Anti-islanding	See product page

(1) Can be adjusted to 60 Hz

(2) Protection key: a) output short circuit b) overload c) battery voltage too high d) battery voltage too low e) temperature too high f) 230 VAC on inverter output g) input voltage ripple too high

(3) Non-linear load, crest factor 3:1

(4) At 25°C ambient

(5) Programmable relay which can be set for general alarm, DC under voltage or genset start/stop function.

12.4. GX Device

GX Card Specifications

User interface	Value
Display	2x16 character display
Remote Console	yes
Buzzer	yes
Victron comm. ports	1
VE.Direct ports (always isolated)	2 paralleled RJ45 sockets – isolated
Dedicated BMS-Can port (VE.Can not supported)	2 paralleled RJ45 sockets – isolated
VE.Bus	Many battery brands. See battery compatibility for details
Non Victron-products Canbus-BMS batteries	See here for details
Fronius PV Inverters	See here for details
SMA PV Inverters	See here for details
ABB PV Inverters	See here for details
SolarEdge PV Inverters	See here for details
Communication	USB, Ethernet, Wi-Fi, Bluetooth, Smart Micro SDcard slot
USB	1 USB Host port - not isolated
Ethernet	10/100 RJ45 socket
WiFi	built-in
Bluetooth	no
Smart	no
Micro SDcard slot	no
Second CAN-bus port	no
VE.Can port	no
Built-in RS485	n/a
IO	no
Programmable relay(7)	no
Resistive tank level inputs	no
Temperature sense inputs	no
Digital inputs	no
Performance	CPU quad core, RAM 512MB
Other	powered internally, no external supply
Supply voltage	Built-in
Mounting	-20 to +50°C
Operating temperature	yes
Battery backupped clock	yes

14. Appendix

14.1. Appendix A: Connection Overview

Detailed terminal descriptions:

A: Load connection. AC-OUT-1 (N, PE, L from left to right).
B: Load connection. AC-OUT-2 (N, PE, L from left to right).
C: AC input 1, AC input 2, AC Output (N, PE, L from left to right).
D: Alarm contact: NO, NC, COM.
E: Start without Assistants (Press and hold this button when starting).
F: Primary ground connection (PE).
G: Battery positive connection (M8).
H: Battery minus connection (M8).
I: Switch (Terminals top to bottom: -:On, 0:Off, =:charger only).
J: Terminals (top to bottom): Auxiliary power supply 12V 100mA; Programmable open collector output (K1) 70V 100mA; External ground relay +; External ground relay -; Analog/digital (AUX) input 1 +; Analog/digital (AUX) input 1 -; Analog/digital (AUX) input 2 +; Analog/digital (AUX) input 2 -; Temperature sense +; Temperature sense -; Battery voltage sense +; Battery voltage sense -.
K: External current sensor.
L: 2x RJ45 VE-BUS connector for remote control and/or parallel / three-phase operation.
M: Connector for remote switch (Short connection to switch "on").
N: Dedicated BMS-Can port (VE.Can not supported).
O: USB (Host port).
P: Reset Button (Reboots the GX card component only).
Q: Ethernet Port.
R: VE.Direct Port.
S: Solar Positive M6 Bolt.
T: Solar Negative M6 Bolt.

14.2. Appendix B: Block Diagram

The block diagram illustrates the main components: the Inverter/Charger, the MPPT Solar Charge Controller, and the GX Device. It shows how these are interconnected with the battery, AC input, and AC outputs, facilitating understanding of the system's architecture and data flow.

14.3. Appendix C: Parallel Connections

Additional conditions are required for parallel systems. Please refer to the specific documentation: https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems

14.4. Appendix D: Three Phase Connections

Three-phase systems can be configured using multiple units. Master: Unit1 – EasySolar-II GX; Slave1: Unit2 – MultiPlus-II; Slave2: Unit3 – MultiPlus-II. Additional conditions apply, and specific documentation should be consulted: https://www.victronenergy.com/live/ve.bus:manual_parallel_and_three_phase_systems

14.5. Appendix E: Charge Characteristic

14.5.1. 4-stage charging:

Bulk: Constant current applied until nominal battery voltage is reached, then constant power up to gassing voltage (temperature compensated). This stage is entered when the charger starts.

14.5.2. Battery Safe

Voltage is gradually raised to the set Absorption voltage. This mode is part of the calculated absorption time.

14.5.3. Absorption

The absorption period is dependent on the bulk period, with a maximum set absorption time.

14.5.4. Float

Float voltage is applied to keep the battery fully charged.

14.5.5. Storage

After one day of float charge, output voltage reduces to storage level (e.g., 26.4V / 52.8V for 24V/48V chargers) to minimize water loss. After an adjustable time (default 7 days), the charger enters Repeated Absorption mode (default 1 hour) to refresh the battery.

14.6. Appendix F: Temperature Compensation

Default Float and Absorption voltages are at 25°C. Reduced Float voltage and Raised Absorption voltage follow these base values. Temperature compensation does not apply in adjust mode.

14.7. Appendix G: Dimensions

Dimensional drawings and measurements are provided for the different models:

EasySolar-II 24/3000/70-32 MPPT 250/70 GX

Dimensions: 499 x 268 x 237 mm (Height x Width x Depth)
Weight: 26 kg

EasySolar-II 48/3000/35-32 MPPT 250/70 GX

Dimensions: 499 x 268 x 237 mm (Height x Width x Depth)
Weight: 26 kg

EasySolar-II 48/5000/70-50 MPPT 250/100 GX

Dimensions: 604 x 323 x 253 mm (Height x Width x Depth)
Weight: 38.6 kg

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1. Introduction