How big a solar panel does a 120a battery require

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How many solar panels do I need for a 120ah battery?

The general rule would be to make use of this formula: For instance, if you have a 12V 120Ah battery and about 5 hours of peak sun hours in your camping location, the computation would go like this: All in all, you'd need around 300W of solar panels to pair with your 120Ah battery.

How to calculate solar panel size?

Here are some steps to manually calculate the solar panel size for your battery. 1. Convert the battery capacity in watt-hours by multiplying the amp-hours with battery voltage. Let’s suppose you have a 12v 120ah battery. 2.

How much wattage does a solar panel need?

Assuming a solar panel efficiency of 20%, we can calculate the solar panel wattage required: Therefore, you would need a solar panel with an output of at least 900 watts, assuming a 20% efficiency, to charge the 12V 120Ah battery within 8 hours, and 750Watt for 12v 100Ah battery.

How to charge a 12V 120ah battery?

For the 12V 120Ah battery with a watt-hour capacity of 1440Wh and an 8-hour charging time: Therefore, you would need a solar panel with an output of at least 150 watts to charge the 12V 100Ah battery and 180watts to charge 12v 120Ah battery within 8 hours.

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