Mars Rock 2000W Micro Solar PV Power Off Grid Inverter User Manual

1. Introduction

The Mars Rock 2000W Micro Solar PV Power Off Grid Inverter is a device designed to convert direct current (DC) from various sources like storage batteries, solar panels, and wind power systems into alternating current (AC). This inverter utilizes high-frequency power conversion technology, incorporating a ferrite transformer for a lighter and more compact design compared to older models. It produces a pure sine wave output, ensuring high-quality AC power suitable for a wide range of appliances.

1.1. Working Principle

The inverter functions by taking DC input and transforming it into AC output. Its internal structure includes a bridge, control logic, and line circuit, all working in conjunction to achieve efficient power conversion.

1.2. About Pure Sine Wave

A pure sine wave output replicates the alternating current found in standard utility grids, often with superior quality due to the absence of electromagnetic pollution. This high-quality AC is ideal for powering all types of loads, including sensitive electronics, though it requires more advanced technology and higher manufacturing costs.

1.3. About Inductive Loads

Inductive loads are electrical products that operate on the principle of electromagnetic induction, such as motors, compressors, and relays. These appliances typically demand a starting current significantly higher (approximately 5-7 times) than their normal operating current. For instance, a refrigerator consuming 150 watts during operation might require over 1000 watts to start. Additionally, inductive loads can generate a back electromotive force voltage when switched on or off, which can exceed the inverter's voltage tolerance and lead to transient overload. Therefore, such appliances necessitate a robust power supply with a stable waveform.

1.4. Applications

This inverter is suitable for solar and wind power systems that provide both AC and DC power. It can power various original equipment, including lamps, electric cookers, desktop computers, notebook computers, computer monitors, fax machines, printers, LCD TVs, fans, DVD players, mobile phones, digital products, drills, and electric irons. When powering inductive appliances, ensure they comply with the inverter's specifications to prevent overload.

2. Installation Instructions

Follow these steps carefully to ensure proper and safe installation of your inverter:

1. **Turn off the switch:** Before making any connections, ensure the inverter's power switch is in the OFF position.
2. **Connect DC cables to battery:** Connect the red DC cable to the positive (+) terminal of your battery and the black DC cable to the negative (-) terminal. Ensure a secure connection.
3. **Initial power-on test:** Turn on the inverter's switch to verify it starts normally. Observe the digital display for any error indicators.
4. **Connect AC appliance:** If the initial test is successful, please connect the plug of your electrical appliance to the inverter's AC output socket. Finally, turn on the inverter's switch again to supply power to the appliance.

2.1. Battery Connection Configurations

The inverter supports various DC voltage inputs. Ensure your battery bank matches the inverter's input voltage requirement. Below are common battery connection configurations:

2.2. Off-Hybrid Grid System Integration

The inverter can be integrated into an off-hybrid grid system, combining solar and wind power sources with battery storage to provide reliable AC and DC power.

2.3. Available Socket Types

The inverter is available with various socket types to accommodate different regional standards. Please ensure you have the correct socket type for your appliances.

3. Operating Instructions

Once properly installed, operating the Mars Rock inverter is straightforward. The digital display provides real-time information about the system's status.

3.1. Digital Display (E Model)

The E model of the inverter features a comprehensive digital display that shows critical operational parameters and protection statuses:

• **Power On:** Indicates the inverter is active.
• **Battery Connected:** Confirms a successful battery connection.
• **Battery Level:** Shows the current charge level of the connected battery.
• **Battery & AC Output Voltage:** Displays both the input DC voltage from the battery and the output AC voltage.
• **Frequency:** Shows the output AC frequency (e.g., 50Hz or 60Hz).
• **Output Load Percent:** Indicates the percentage of the inverter's capacity currently being used by connected loads.
• **Inverter Low Voltage Protection:** Activates if the input DC voltage drops too low.
• **Inverter Overload Protection:** Activates if the connected load exceeds the inverter's capacity.
• **Inverter Over Temperature Protection:** Activates if the inverter's internal temperature becomes too high.
• **Inverter Normal Working:** Indicates the inverter is operating correctly.
• **Inverter Under Protection:** General indicator for any active protection mode.
• **Inverter Over Voltage Protection:** Activates if the input DC voltage is too high.

3.2. Remote Switch

The inverter includes a remote switch for convenient control. Before using the remote switch, ensure the inverter's main switch is in the OFF position. When the remote switch is used, the inverter will power on or off accordingly.

3.3. USB Output

A 5V/1Amp USB output port is available for charging small electronic devices.

4. Maintenance

To ensure the longevity and optimal performance of your Mars Rock inverter, follow these general maintenance guidelines:

• **Keep Clean:** Regularly clean the exterior of the inverter with a dry, soft cloth. Ensure ventilation openings are free from dust and debris to prevent overheating.
• **Ensure Ventilation:** The inverter features an intelligent cooling fan that activates when the temperature exceeds 45℃. Ensure adequate airflow around the unit to allow for efficient cooling.
• **Check Connections:** Periodically inspect all DC and AC connections to ensure they are tight and free from corrosion. Loose connections can lead to power loss or overheating.
• **Battery Health:** Monitor the health of your connected batteries. A healthy battery bank is crucial for the inverter's performance and lifespan.
• **Storage:** If storing the inverter for an extended period, ensure it is kept in a dry environment with a temperature between -30℃ and +70℃.

5. Troubleshooting

The Mars Rock inverter is equipped with several protection features to ensure safe operation. If the inverter stops working or displays an error, refer to the following common issues and their indicators:

• **Low Voltage Alarm/Protection:** The inverter will alarm and shut off output automatically if the input DC voltage drops below the specified low voltage threshold (e.g., 9.5V for 12VDC systems). Check battery charge level and connections.
• **Over Voltage Alarm/Protection:** The inverter will alarm and shut off output automatically if the input DC voltage exceeds the specified over voltage threshold (e.g., 15.5V for 12VDC systems). Verify the battery charging source.
• **Short Circuit Protection:** In case of a short circuit in the output, the inverter will automatically shut off output to prevent damage. Disconnect all loads and check for short circuits in your wiring or appliances.
• **Overload Protection:** If the total power draw of connected AC loads exceeds the inverter's rated power, it will shut off output. Reduce the load by disconnecting some appliances.
• **Over Temperature Protection:** If the inverter's internal temperature rises above safe limits (e.g., due to insufficient ventilation or high ambient temperature), it will shut off output. Ensure proper ventilation and reduce ambient temperature if possible.
• **Fault Indicator:** The digital display includes a "FAULT" indicator. If illuminated, refer to the specific protection indicators on the E model display for more details on the type of fault.

If the issue persists after checking these points, please contact customer support.

6. Specifications

6.1. Mechanical Parameters

6.2. DC Voltage Parameters

7. User Tips

• **Match Inverter to Load:** Always ensure the inverter's rated power is sufficient for your connected appliances, especially considering the higher starting current required by inductive loads.
• **Battery Compatibility:** Double-check that your battery bank's voltage (e.g., 12V, 24V, 48V) matches the inverter's input voltage. Incorrect voltage can damage both the inverter and batteries.
• **Cable Sizing:** Use appropriately sized DC cables for connecting the inverter to your batteries to minimize voltage drop and ensure efficient power transfer.
• **Ventilation is Key:** Position the inverter in a well-ventilated area to prevent overheating, which can trigger over-temperature protection and reduce efficiency.
• **Remote Monitoring:** Utilize the remote display to conveniently monitor battery status and inverter performance without needing to access the main unit directly.

8. Warranty & Support

8.1. Warranty Information

This Mars Rock inverter comes with a **2-year warranty** covering manufacturing defects and malfunctions under normal use conditions. Please retain your proof of purchase for warranty claims.

8.2. Customer Support

For technical assistance, troubleshooting, or warranty inquiries, please contact Mars Rock customer support:

• **Tel:** +86-592-2237280
• **WeChat:** marsrockpower
• **Skype:** cnmarsrock or mars-rock
• **Email:** service@marsrock.com.cn
• **Mob/WhatsApp:** +86-18059289868
• **Website:** www.marsrock.com.cn
• **Location:** Xiamen, China