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Very true. . .but we don't have the values for these specific batteries or the charger unit and its eta, so we just did with a perfect system.
Thats a baseline of what it will always cost at least more than this. Which is a pretty good place to start since everything else is pretty highly variable(what is the temperature outside, is there any wind, did you just finish driving and the components are producing extra heat, has the charger been running for a week or is it brand new, are the wires in the outlet new, is it peak off-peak.) In short there are way too many factors for it to be worthwhile to compute an exact amount. The estimates are reasonably close and to get an approximation thats near exact would take alot of effort.
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