Be very thoughtful of buying a battery powered "generator". It usually can only power applications very short period compared to say gasoline powered one. Here is an ideal estimation:
4 40V 4Ah batteries give a total 640Wh energy. Assuming 0% energy loss during 40V to 110V conversion, it can power a 1000W output for 0.64 hour only.
4 40V 4Ah batteries give a total 640Wh energy. Assuming 0% energy loss during 40V to 110V conversion, it can power a 1000W output for 0.64 hour only.
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