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Old 26-07-2014, 07:26   #61
noelex 77's Avatar

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Re: Spectra Water Makers Advice Please

Originally Posted by witzgall View Post
One of the reasons I think people get the energy calculations wrong is that they ignore charge efficiency of their batteries. Lead Acid, wet cells typically only store 1ah for every 1.3ah produced. That means that to put 1h back into the battery bank, you need to producer 1.3 amps for an hour.
It is an important factor in calculating the energy budget, although 30% is a bit high.

It is not a big factor with watermakers, because most of the time people operate them when they are energy positive (or close to it) so the power is supplied directly by solar, or the generator rather than going through the conversion process of adding to the battery and then extracting it.

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