Choosing an inverter battery without calculating electricity consumption can lead to poor backup performance. A battery that is too small may discharge quickly, while an oversized system can increase costs unnecessarily.
Before purchasing a lithium battery for inverter, homeowners should understand battery capacity, appliance wattage, and required backup duration.
Yukinova Battery offers lithium inverter batteries in different capacity configurations. A simple energy calculation can help identify suitable options.
Understanding Battery Capacity
Battery capacity describes how much electrical energy a battery can store.
Two common units appear in product specifications:
Ampere-hours (Ah): Measures electrical charge capacity.
Watt-hours (Wh): Measures stored electrical energy.
For a basic estimate:
Battery Energy (Wh) = Nominal Voltage × Capacity (Ah)
For example, a 25.6V, 100Ah battery has a nominal energy rating of approximately 2,560Wh, or 2.56kWh.
However, actual usable energy depends on battery discharge limits, temperature, and system efficiency.
How to Size a Lithium Battery for Inverter
Begin by identifying the appliances you want to operate during a power cut.
Consider the following example:
| Appliance | Total Wattage |
|---|---|
| Two ceiling fans | 140W |
| Four LED lights | 40W |
| Wi-Fi router | 10W |
| Television | 80W |
| Total | 270W |
If these appliances operate for four hours:
270W × 4 hours = 1,080Wh.
This means the appliances require approximately 1.08kWh of electricity.
The battery must supply more energy because the inverter consumes some electricity during conversion.
Include Inverter Efficiency
Inverters convert DC electricity from the battery into AC electricity used by household appliances.
This conversion is not perfectly efficient.
If an inverter operates at an assumed efficiency of 90%, the battery energy required for a 1,080Wh appliance load is:
1,080 ÷ 0.90 = 1,200Wh.
This is a simplified estimate.
Actual energy requirements may be higher because of standby consumption, battery discharge limits, and operating conditions.
Consider Future Appliance Needs
Your household electricity requirements may change over time.
You might add another fan, computer, television, or other appliance.
Allowing reasonable capacity for future requirements can make the system more practical.
However, increasing battery capacity without checking inverter compatibility may create charging problems.
The inverter and battery should be selected as a complete system.
Why Voltage Compatibility Matters
Lithium batteries are available in different nominal voltage configurations.
For example, Yukinova Battery’s displayed range includes 12.8V, 25.6V, and 51.2V battery options.
These configurations are not automatically interchangeable.
A battery designed for a 25.6V system should not be connected to an inverter requiring a different battery voltage.
Always follow the manufacturer’s electrical specifications.
Compare Yukinova Battery Models
Visit https://yukinova.com/lithium-inverter-battery to explore available lithium inverter battery models.
Check nominal voltage, energy capacity, charging requirements, and compatibility before purchasing.
Conclusion
Selecting a lithium battery for inverter requires understanding appliance load, backup duration, and usable battery energy. Yukinova Battery offers different configurations that can be compared using these calculations.
Frequently Asked Questions
1. What does 100Ah mean?
It represents a rated charge capacity of 100 ampere-hours.
2. Is kWh more useful than Ah?
kWh helps compare stored energy across batteries with different voltages.
3. Can a 100Ah battery run several fans?
Possibly, depending on battery voltage, fan wattage, and backup duration.
4. Why should inverter efficiency be considered?
Some stored energy is lost during DC-to-AC conversion.
5. Can I connect any lithium battery to my inverter?
No. Voltage and charging compatibility must be verified.
