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Old 08-26-2014, 08:15 PM   #10 (permalink)
rmay635703
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Join Date: Jun 2008
Location: Somewhere in WI
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Silver - '10 Chevy Cobalt XFE
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Quote:
Originally Posted by oldtamiyaphile View Post
I my experience, a healthy 120Ah starting battery accepts <5Wh from the time the engine is switched off to the time the controller enters float charge. I don't need to tell you that's too small to ever measure the MPG gain.
This behavior is specific to EV's and hybrids, personally if you can fit a small solar panel to trickle charge your car I recommend it for any car and especially EV's.

In the case of the insight the DC-DC is less efficient than you may think because of the lead battery and also there are loads using Cobbs setup that now do not require the DC-DC to fire which is what increases FE, add to that Cobb likely drives like a hypermiler so the effect is even more exaggerated.

This makes me think even more strongly that a 14v deep cycle FLA belongs in every EV and hybrid, no inverter needed until the battery would deplete.

Cheers
Ryan
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