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ggi2020 avatar image

What size battery storage is recommended for a 3kwp pv system?

Hi, I'm currently in the process of building a 3kwp pv system. Im not sure how many batteries I will need. The batteries need to be either 12v or 24v if possible. Thankyou.

batterybattery capacity
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2 |3000

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Off grid or you have grid available?

Will you use an inverter or it will be a DC only system?

If you will have an inverter, how big it will be? If 3000VA or larger, go for a 48V system (48V battery).

What type of battery (lead-acid, LiFePO4, etc.)?

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nobodyspecial avatar image
nobodyspecial answered ·

Off grid? Grid tied? Inside the artic circle? On the equator? Sounds like you're pretty new so that was a joke. 1x your daily energy usage is about all that typically makes sense for both space requirements and budget restrictions. So if your daily energy usage is 10kWh then you need 10kWH of storage. That's ~420AH at 24v. If it's cloudier for longer than that you adjust your usage, start the generator or go back on the grid.

2 |3000

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