The Solar Battery Calculator is designed to help you calculate the size of the solar battery needed for your system. By inputting key parameters such as daily energy consumption, the number of autonomy days, battery voltage, and depth of discharge, the calculator provides an accurate estimate of the required battery capacity. This ensures that your solar system is neither underpowered nor overbuilt, leading to optimal performance and cost savings.
Formula of Solar Battery Calculator
To calculate the size of the solar battery needed, use this formula:
Battery Capacity (Ah) = (Daily Energy Consumption (Wh) * Autonomy Days) / (Battery Voltage (V) * Depth of Discharge (DOD))
Explanation of Terms
- Daily Energy Consumption (Wh): Total energy used by the system in a day, in watt-hours (Wh).
- Autonomy Days: Number of days the battery should supply power without solar panel recharging.
- Battery Voltage (V): The nominal voltage of the battery (commonly 12V, 24V, or 48V).
- Depth of Discharge (DOD): The percentage of the battery’s capacity that can be used (commonly 50%).
Pre-calculated Table
For quick reference, here is a table with pre-calculated battery capacities for common scenarios. This can help you get an estimate without going through the calculations each time.
| Daily Energy Consumption (Wh) | Autonomy Days | Battery Voltage (V) | Depth of Discharge (DOD) | Battery Capacity (Ah) |
|---|---|---|---|---|
| 1000 | 3 | 12 | 0.5 | 500 |
| 2000 | 2 | 24 | 0.5 | 167 |
| 5000 | 5 | 48 | 0.5 | 104 |
Example of Solar Battery Calculator
Let’s go through an example to see how the formula is applied:
- Daily Energy Consumption: 1500 Wh
- Autonomy Days: 3
- Battery Voltage: 24V
- Depth of Discharge: 50%
Using the formula:
Battery Capacity (Ah) = (1500 Wh * 3) / (24V * 0.5) = 375 Ah
This means you need a battery with a capacity of 375 Ah.
Most Common FAQs
The Solar Battery Calculator provides a reliable estimate based on the input parameters. However, actual performance can vary depending on environmental factors and battery quality.
Yes, the calculator can be use for various types of batteries as long as you input the correct battery voltage and depth of discharge specific to your battery type.
Depth of discharge (DOD) is important because it determines how much of the battery’s capacity can be use without significantly reducing its lifespan. Using the correct DOD ensures your battery performs efficiently and