EDECOA EM-302A Hybrid Inverter: Installation and User Guide
This document provides comprehensive instructions for the installation, configuration, and operation of the EDECOA EM-302A hybrid inverter.
Index
Installation
This section details the steps for installing the EDECOA hybrid inverter.
Description
The EDECOA EM-302A is an all-in-one unit featuring a 6200W pure sine wave inverter, an 80A battery charger, and a 110A MPPT charge controller. It offers configurable input voltage ranges via an LCD screen or Wi-Fi module, adjustable battery charging current, and selectable solar/AC charger priority. The inverter includes a multiple protection system with automatic restart during AC recovery and a cold start function to optimize battery performance.
Important Considerations:
- Off-Grid Operation: This is an off-grid inverter. It cannot compensate for excess energy generated to the electric company. Excess energy is stored in the batteries.
- Grid-Tied vs. Off-Grid: The hybrid inverter can be installed even without a grid connection, provided a battery is always connected.
- PV Input Voltage Range: The inverter has a PV input voltage range of 55-450 Vdc. If a voltage lower than 55 Vdc is connected, the inverter will not detect the installation.
- Calculating Solar Panels: To calculate the number of panels needed, consider the maximum supply voltage (Vmp). For example, 34.89 Vmp * 2 panels = 69.78 Vdc. It is recommended to install one additional solar panel to account for voltage loss.
Accessories Included:
- 1m x 25mm² positive cable
- 1m x 25mm² negative cable
Important Note on Powering On:
All inverters are shipped with the power button in the OFF position. Ensure the inverter is turned ON after installation. The LCD display will illuminate when PV load is detected, regardless of the button's position, which might cause confusion.
System Diagram:
Illustrates the connection of the inverter to utility power, solar panels, and batteries, powering various household appliances.
Connection Example:
Shows a typical setup with multiple solar panels connected in series to the inverter, which is then connected to batteries and utility power.
Description
LCD Screen
The LCD screen allows for control and configuration of the hybrid inverter. Various programs can be selected based on installation needs.
- AC/INV Icon: Indicates when devices are powered by the grid (solid) or by battery/solar panels (flashing).
- CHG Icon: Indicates when the battery is fully charged (solid) or charging (flashing).
- FAULT Icon: Indicates a fault condition (red solid) or a warning of a potential fault (flashing).
Input Source Information:
- AC: Indicates AC input.
- PV: Indicates PV input.
- INPSTRATT: Displays input voltage, input frequency, PV voltage, battery voltage, and charger current.
Configuration Program and Fault Information:
- Configuration Programs: Indicated by a gear icon.
- Warning and Fault Codes: Warnings are indicated by a flashing icon with a warning code; errors are indicated by a flashing icon with an error code.
Battery Information:
Displays battery level in 25% increments (0-24%, 25-49%, 50-74%, 75-100%) in battery mode and charging status in line mode.
Load Information:
- OVERLOAD: Indicates overload status and load level (0%-25%, 25%-50%, 50%-75%, 75%-100%). A checkmark symbol (✓) is used.
- Mode Operation Information: Describes different operating modes such as unit connected to the grid, unit connected to PV panel, BYPASS mode (load supplied by utility, utility charger working, DC/AC inverter working), and alarm disabled status.
Configuration
Configuration is accessed by pressing the ENTER button for 3 seconds. Use the UP/DOWN buttons to select programs and ENTER to confirm or ESC to exit.
Configuration Options:
- Output Charging Mode: Options include Solar + Battery + Utility (SBU), Solar + Utility + Battery (SUB), and others. The choice depends on the installation and grid availability.
- Battery Charging Mode: Options include CSO (Solar priority), SNU (Solar and Utility simultaneously), and OSO (Solar only).
- Charging Current: Options typically include 50A (default), 60A, and 80A for faster battery charging.
- Transfer Time: Options for switching between power sources, with APL (0.01s, 90-280 VAC input) and UPS (<0.01s, 170-280 VAC input) for sensitive devices.
- Power Saving Mode: Can be enabled or disabled. When enabled, the inverter may shut down if no load is detected.
Detailed Configuration Table:
| Program | Option | Description |
|---|---|---|
| 05 | Battery Type | AGM (AGM), Gel/Special (USE), Flooded (FLd), LiFePo4 (L1b) |
| 06 | Auto restart on overload | Disabled (Lfd), Enabled (LFE) |
| 07 | Auto restart on over-temperature | Disabled (Lfd), Enabled (LFE) |
| 08 | Output voltage | 230V (Standard in Europe) |
| 09 | Output frequency | 50 Hz (Standard in Europe) |
| 11/12 | AC charging current | 10A, 20A, 30A, 40A, 50A, 80A |
| 12 | Battery voltage for utility switch | BATT, 51V, 44V, 51V |
| 13 | Battery voltage for returning to battery power | BATT, FUL, 48.0V |
| 16 | Charging mode priority | Solar first (ESO), Solar and utilities (SNU), Only Solar (OSO) |
| 18 | Alarm control | Enabled (bon), Disabled (bOF) |
| 19 | Return to default display | Stay at previous screen (ESP), Return to default (FEP) |
| 20 | Lighting control | Light on (LON), Light off (LOF) |
| 22 | Beeps on primary source interruption | Enabled (AON), Disabled (AOF) |
| 23 | Overload bypass | Disabled (b9d), Enabled (b9E) |
| 25 | Record error code | Enabled (FEח), Disabled (Fd5) |
| 26 | Charging voltage (CV Voltage) | Default: 56.4V (Check battery info) |
| 27 | Floating charging voltage | Default: 54V (Check battery info) |
| 29 | Low DC cut-off voltage | Default: 42V (Check battery info) |
| 31 | Solar input power adjustment | Enabled (automatically adjusts based on load) |
| 33 | Battery equalization | Enabled/Disabled (available for FLD or USE in program 05) |
| 34 | Battery equalization voltage | Default: 58.4V (Range: 40V-50.4V) |
| 35 | Battery equalization time | 60 minutes (50), 120 minutes (120) |
| 37 | Equalization range | 30 days (30d) |
| 39 | Equalization activated immediately | Enabled (REח), Disabled (REd) |
LCD Screen Display Scenarios:
- 230Vdc INPUT / 230V OUTPUT: Shows input and output voltages.
- Battery Charging: Indicates batteries are charging and powering devices. Battery is fully charged when all cells are full.
- 25% Load Used: Shows 25% of battery capacity is used, with 75% remaining.
- Input/Output Display: Shows input voltage, output voltage, battery status, and load percentage.
- AC Input: Displays AC input voltage and frequency (e.g., 230V, 50Hz).
- MPPT Charging Current: Displays MPPT current and load current.
- Battery Voltage and Current: Shows battery voltage and discharge current.
- Output Frequency: Displays output frequency.
- Percentage of Load: Shows the percentage of load being drawn.
- Load in VA/Watts: Indicates the connected load in Volt-Amperes or Watts.
LCD Screen Bottom Part Description:
- No load connected: Inverter is in standby or power-saving mode.
- Line Mode: Charging battery and powering devices via grid and solar, or solely via the grid.
- Battery Mode: Inverter provides power from solar panels to batteries and devices, or from batteries to devices.
Communication Port Pin Definition:
Details the pinout for the communication port (TX, RX, VCC, RS485A, RS485B, GND).
Lithium Battery Mode Configuration:
Instructions for entering lithium battery mode (program 05 'USE') and viewing battery information like voltage, level, charging/discharging current, capacity, and temperatures.
Types of Errors
This section lists common error codes displayed on the inverter's LCD screen and their potential causes and solutions.
- Error 01: Fan locked. Check for obstructions or high ambient temperature.
- Error 02: Over Temperature. Check fan operation and ambient temperature.
- Error 03: Battery voltage too high.
- Error 04: Battery voltage too low.
- Error 05: Output short-circuited or internal component over-temperature.
- Error 06: Output voltage too high.
- Error 07: Overload timeout.
- Error 08: B.U.S voltage too high.
- Error 09: B.U.S soft start failed.
- Error 10: Main relay failed.
- Error 11: Solar charger stops due to high PV voltage.
- Error 12: Over-voltage from battery cell.
- Error 22: Low-voltage from battery cell.
- Error 23: Over-voltage from battery pack.
- Error 24: Low-voltage from battery pack.
- Error 25: Over current - charging.
- Error 26: Over current - discharging.
- Error 27: High temperature on charging battery cell.
- Error 28: High temperature on discharging battery cell.
- Error 29: Low temperature on charging battery cell.
- Error 30: Low temperature on discharging battery cell.
- Error 31: High temperature environment.
- Error 32: Low temperature environment.
- Error 33: High temperature on MOSFET.
- Error 35: Short circuit.
- Error 36: Over voltage on the charger.
- Error 51: Overcurrent.
- Error 52: B.U.S voltage is too low.
- Error 53: Soft start failure.
- Error 55: Over DC voltage.
- Error 56: Battery connection problem.
- Error 57: Current sensor failure.
- Error 58: The output voltage is too low.
Troubleshooting Scenarios:
- Unit shuts down during startup: Battery voltage too low (<1.91V/Cell) or reversed polarity. Check battery connections, fuse, and recharge battery.
- Mains present but unit in battery mode: Input protector tripped or insufficient AC power quality. Check AC breaker and wiring, generator status, or input voltage range settings.
- Internal relay repeatedly switches ON/OFF: Likely due to output power reduction or incorrect configuration.
- CHG Flashing: Indicates battery charging. If 'Solar First' is selected and utility is needed, change output source priority.
- Continuous alarm with red FAULT LED: Indicates critical errors like fan failure, over-temperature, short circuits, or component failures. Refer to specific error codes for detailed troubleshooting.
- B.U.S voltage too low: Check battery connections and reset the inverter.
- Output voltage imbalance: Reset the inverter and contact customer service if the issue persists.
- Battery connection issue or fuse burnt: Check battery connections and the fuse.
Warning Types:
- Fan Blocked: Beeps 3 times/sec.
- Battery Over-charged: Beeps once/sec.
- Low Battery: Beeps once/sec.
- Overload: Beeps once every 0.5 sec.
- Output Power Derating: Beeps twice every 3 sec.
- Solar Charger Stops: Due to low battery, high PV voltage, or overload.
- Battery Cell Voltage Issues: Over-voltage or low-voltage from battery cells or packs.
Specifications
Line Mode Specifications:
- Input Voltage Waveform: Sinusoidal (utility or generator).
- Nominal Input Voltage: 230 VAC.
- Low Loss Voltage: 170 VAC ± 7V (UPS); 90 VAC ± 7V (Appliances).
- Low Loss Return Voltage: 180 VAC ± 7V (UPS); 100 VAC ± 7V (Appliances).
- High Loss Voltage: 280 VAC ± 7V.
- High Loss Return Voltage: 270 VAC ± 7V.
- Max AC Input Voltage: 300 VAC.
- Frequency: 50 Hz / 60 Hz (Auto detection).
- Cut-off Low Frequency: 40 ± 1 Hz.
- Recovery (Low) Frequency: 42 ± 1 Hz.
- Cut-off High Frequency: 65 ± 1 Hz.
- Recovery (High) Frequency: 63 ± 1 Hz.
- Short-circuit protection: Circuit breaker.
- Efficiency: >95% (nominal load R, fully charged battery).
- Transfer time: 10ms typical (UPS); 20ms typical (Appliances).
Output Power Reduction: Output power is reduced when AC input voltage drops to 170V.
Inverter Mode Specifications:
- Rated Output: 7.0 kVA / 6.2 kW.
- Output Voltage Waveform: Pure Sine Wave.
- Output Voltage Regulation: 230 VAC ± 5%.
- Output Frequency: 50 Hz.
- Peak Efficiency: 94%.
- Overload Protection: 5s @ ≥150% load; 10s @ ≥110% load.
- Surge Capacity: 2 * rated power for 5 seconds.
- Nominal DC Input Voltage: 48 VCC.
- Cold Start Voltage: 46.0 VCC.
- Low DC Warning Voltage: Varies based on load percentage (e.g., 44.0 VCC @ load < 20%).
- Low DC Warning Return Voltage: Varies based on load percentage.
- Low DC Cut-off Voltage: Varies based on load percentage (e.g., 38.4 VCC @ load ≥ 50%).
- High DC Recovery Voltage: 58 VCC.
- High DC Cut-off Voltage: 62 VCC.
- No-Load Power Consumption: <50W.
- ECO Power Consumption: <15W.
Utility Charging Mode:
- Charging Algorithm: 3-Step.
- Charging Current (UPS): 80A.
- AC Charging Current: 10/20 Amp.
- Bulk Charging Voltage (V): Flooded Battery (58.4V), AGM/Gel Battery (56.4V).
Solar Charging Mode (MPPT):
- Rated Out Power: 6000W.
- PV charging current: 110A.
- Efficiency: 98.0% max.
- Max. PV array open circuit voltage: 450 VCC.
- PV array MPPT voltage range: 55-450 VCC.
- Standby energy consumption: 2 W.
- Battery voltage accuracy: +/-0.3%.
- PV voltage accuracy: +/-2V.
General Information:
- Safety certification: CE/UKCA.
- Operating temperature range: 0-55°C.
- Storage temperature: -15-60°C.
- Dimension (mm): 423 x 290 x 105.
- Net weight (kg): 7.5.
