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We provide a three-year warranty for the poor performance of battery products when used correctly in accordance with the product manual instructions.. The warranty is in effect from the date of purchase by the user. Please read the product manual carefully before installing and using the product and use the battery correctly under the manual's instructions.

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Frequently asked questions

Our team of dedicated engineers and battery experts are always just a phone call away to answer your questions and make your switch to lithium seamless.
We're here to help you understand how our batteries work and how to implement them in a system that's right for you.
Can’t find what you’re looking for in our FAQS?
Give us a call at +8619146482625 Or contact us by email: sales@easunpower.com.

LiFePO4 Lithium Battery

1. Are Easunpower LiFePO4 Lithium batteries safe?

Yes. LiFePO4 is an inherently safe chemistry and the most stable lithium-type battery on the market.
Easunpower lithium cells are UL-certified for the highest safety and sustainability standards. All Easunpower LiFePO4 batteries come with an internal Battery Management System, which protects against under-voltage during discharge, over-voltage during charge, over-current during discharge, over-temperature during charge and discharge, and short-circuit protection – protects battery cells from damage. Additionally, Easunpower LiFePO4 Lithium batteries have been tested to be free from the risk of fire, and electric shock in harsh environments.

2. Easunpower LiFePO4 Lithium batteries as starting batteries?

No. Easunpower LiFePO4 lithium batteries are not intended to be used as starting batteries but energy storage, please do not use them to start any devices.

3. Can I charge Easunpower LiFePO4 lithium batteries in cold weather (under freezing temperatures)?

The Easunpower 12V 100Ah LiFePO4 batteries can be safely charged between 32°F to 113°F (0°C to 45°C). But when charging under the freezing point, the battery cells may be damaged.

4. How do I store Easunpower LiFePO4 lithium batteries?

It is recommended to store Easunpower LiFePO4 batteries at 50% state of charge (SOC). If the batteries are stored for long periods, cycle the batteries at least every 6 months. Recommended storage environment: 10℃~35℃ (50℉~95℉), 45%RH~75%RH.

5. How long to charge Easunpower LiFePO4 lithium batteries?

You can charge our Easunpower 12V 100Ah lithium battery with a 12V 10Ah or 12V 20Ah charger, and a full charge will take 10 hours and 5 hours respectively.

6. Can I charge Easunpower LiFePO4 Lithium batteries with solar panels?

Yes, you can charge Easunpower LiFePO4 lithium batteries with solar panels. There are 3 ways to charge.

1. Using Solar Panels

The battery can be fully charged in one day (with effective sunshine 4.5 hrs/day) by 300W solar panels. It may take more than one day to fully charge the battery by ≥300W solar panels since the duration and intensity of light would be a great factor for their charging efficiency.

Besides solar panels, there are 2 more ways to charge.

2. Generator/Alternator

If the alternator or generator supports DC output, a DC-to-DC charger is needed to connect the battery to the generator; if your alternator or generator supports AC output, please add a suitable battery charger to connect the battery and the generator according to our recommendations. The Recommended Charging Voltage: 14.2V - 14.6V. The Recommended Charging Current: ① 20A (0.2C): the battery will be fully charged in around 5 hrs to 100% capacity; ② 50A (0.5C): the battery will be fully charged in around 2 hrs to around 97% capacity.

3. LiFePO4 Smart Chargers

To charge 12V battery, it is recommended to use 14.6V battery charger.

The Recommended Charging Voltage: 14.2V - 14.6V.

The Recommended Charging Current: ① 20A (0.2C): the battery will be fully charged in around 5 hrs to 100% capacity; ② 50A (0.5C): the battery will be fully charged in around 2 hrs to around 97% capacity.

7. What to do when receive the battery?

Upon receiving your battery, please note that it may arrive with a low State of Charge (SOC) as a result of the transportation and storage process. To ensure peak performance, we advise promptly charging the battery to prevent over-discharge.

If you intend to store the battery for an extended period without use, we recommend charging it to a SOC 50% and conducting maintenance every three months. These measures will help preserve its functionality and performance in the long run.

8. What are the Differences Between a Group 24 and Group 31 Battery?

The main difference between a Group 24 and Group 31 battery lies in their physical size. Group 24 batteries are generally smaller compared to Group 31 batteries.

Can read on Deep Cycle Group 24 VS Group 31 for more information.

9. Can I connect Easunpower lithium battery in series or paralle?

To connect in series or parallel, batteries should meet the below conditions:

  • identical batteries with the same battery capacity (Ah) and BMS (A);
  • from the same brand (as lithium battery from different brands has their special BMS);
  • purchased in near time (within one month).
10. How many batteries can I connect in sereis or parallel?

The maximum number of connecting Easunpower 12V 100Ah lithium batteries in series or parallel is 4 (4S or 4P). Please notice that the Easunpower lithium batteries can ONLY be connected in series or parallel with the same brand (Easunpower), same type (lithium), same voltage (V), same capacity (Ah), same BMS and similar purchasing date (within 3-6 months).

Solar Inverter

1. What is an off-grid inverter?

Off-grid inverter working mode: connect solar panels to supply power to the load and charge the battery at the same time; you can use the grid or battery to supply power to the load; but cannot feed electricity into the grid;PV+ battery supplies power to the load. When the energy is insufficient, it will automatically switch to bypass mode.

2. What is an Hybrid inverter ?

Hybrid inverter working mode:
Hybrid inverters are also called switched inverters. It not only has the function of an off-grid inverter, but also can sell the power stored in the battery to the grid company;PV panel + battery supply power to the load, and it can also supply power to the load through the PV+ grid

3. What batteries can the inverter support?

Lithium battery, lead-acid battery, gel battery

4. What is the inverter battery voltage requirement?

1KW inverter is equipped with 12V battery; 2KW-3KW inverter is equipped with 24V battery; 4KW-5KW inverter is equipped with 48V battery, which can connect batteries in series or parallel

5. What types of solar panels can the inverter support?

Polycrystalline solar panel, monocrystalline solar panel

6. How many solar panels can be connected to the inverter?

Each inverter must first confirm the solar panel MPPT working voltage range and PV Array Power (you can check the inverter parameter table on the product page). The input voltage of the solar panel cannot exceed the maximum value; the power of the solar panel that can be connected cannot exceed the maximum value

7. Can the inverter work without a battery?

Inverter models that can work without battery:
Off-grid inverter:SML III 3.5KW; SML III 5.5KW; SMG II 3.6KW; SMG II 5.6KP; SMV III 3KW; SMV III 5KW; SMP 5KW; SMR II 5.5KW; SM IV 5.6KW;  SMV IV 5.6KW; SM II 5K PLUS; SMW 3.6KW; SMW 8KW
Hybrid inverter: all models can work without battery

8. Can inverters work in parallel?

If you need inverters that can work in parallel, you can contact us before purchasing and we will recommend the model for you

9. Can the inverter be connected to the wind turbine?

Yes, but you can only connect the output of the wind turbine to the battery, not the inverter

10. How to connect solar panels?

According to the VMP voltage specification of the solar panel, the PV working voltage range connected to the inverter in series, and the open circuit voltage does not exceed the maximum voltage of the inverter.The PV voltage of inverter II and III models should be connected in series above 200V

11. What are the factors of solar panel output power?

1. The output power of solar panels is mainly related to light irradiance and installation angle. The power of each period will be different, it will decrease in the morning and evening, and will increase at noon.
2. The shadow effect. When the solar panel is under light and blocked, it will affect its MPPT tracking. Whether it is completely blocked or partially blocked, it will affect the output power.
3. Hot spot effect, mainly due to damage to the battery panel.

12. What is the no-load loss of the inverter?

The no-load loss of the inverter is about 1A. For example,  24V inverter, the no-load loss is about 24W. You can refer to the manual;No-load loss is mainly reflected in: display screen, auxiliary power supply, DC-AC Conversion, booster circuit, etc.