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Old 02-18-2001
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House battery capacity

Nigel Calder estimates that, including what he calls fudge factors, you need battery capacity equivalent to 4 times your daily usage, i.e., if you need 100 amps per day then according to Nigel you need 400 amp hours. He gives a detailed rationale for all of this. Notwithstanding his considerable expertise and experience, I think he is being quite conservative in his assessment and I personally be comfortable with 3 times daily usage requirements.
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