In order to determine how long it would take to charge a 100Ah battery with a 200W solar panel, we must consider several factors, including the voltage of the battery, the system efficiency, and the intensity of sunlight. Below is a step-by-step guide:

1. Determine the Battery's Total Energy Capacity

The battery's energy capacity can be determined by applying the formula:

Battery Capacity (Wh) = Battery Voltage (V) * Battery Capacity (Ah)

Assuming the battery is 12V, the energy capacity would be:

Battery Capacity (Wh) = 12V * 100Ah = 1200Wh

Therefore, the battery contains 1200 watt-hours (Wh) of energy.

2. Determine the Solar Panel Output

A 200W solar panel ideally generates 200 watts of power per hour under full sunlight. However, because solar panels are affected by factors like weather, angle, and efficiency, let's assume about 5 hours of effective sunlight per day on average (this can vary depending on your location).

So, the solar panel generates:

Energy per day (Wh) = 200W * 5 hours = 1000Wh

This is the same as 1000 watt-hours (Wh) of energy per day in ideal conditions.

3. Calculate Charging Time

We can now calculate how long it would take to charge the battery from the solar panel.

To charge a 1200Wh battery fully using a 1000Wh daily output, it would take:

Charging Time = Battery Capacity (Wh) / Daily Solar Panel Output (Wh)

Charging Time = 1200Wh / 1000Wh/day = 1.2 days

It would therefore take 1.2 days of maximum sunlight to charge the 100Ah battery from a 200W solar panel.

Key Things to Keep in Mind:

• Efficiency Losses: The real efficiency of the charging process (considering losses in battery, wiring, and solar charge controller) will contribute to the time of charging. Efficiency is typically 80-90%, so the real time will be marginally higher.
• Sunlight Variability: The amount of sunlight per day depends on location and weather, which can influence the actual charging time.

In real life, it may take 1.5 to 2 days to fully charge the battery under average conditions.

Click here to access the latest wholesale prices for LZY solar products!