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Originally Posted by orange4boy
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I'm trying to figure out a way of describing this and writing a good thread title so other hybrid owners would understand. In the ICE crowd you would just call it an alternator delete and everyone gets it. The Prius is a different animal.
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If I were doing it, I would probably approach using a step-up, power supply rated at say 600 W (~45 A @13.8 VDC). It would use a current regulating circuit to tickle the voltage up and displace the inverter load. As soon as the target current from the deep storage battery was reached, hold it there.
The advantage is you won't have to break any circuits and it should minimize worry about open-loop, voltage feedback. You may run into some feedback instability but current sense regulators at these voltages and current levels should be standard parts.
One risk is the slightly higher voltage may lead to incandescent lights being a little "bright" and possibly shorter life. ... Tradeoffs.
Bob Wilson