Robert Bruninga via EV wrote:
FWIW, I have a 72 volt UPS for some house backup power, but there are no
cheap 72 volt solar chargers. So I plan on hooking up three DC/DC float
power supplies set to 13.8 volts, one across each of the three 12v
batteries. Their inputs will all be connected to three solar panels in
series (90 to 110 VDC) and outputs one-each to the batteries..
Best I can tell, they will each do their thing independently, due to
primary/secondary isolation and maintain the charge, and be cheap. Yes,
not multi-stage chargers, but since we have never lost power in almost 10
years, this is not a daily charge/discharge thing. Just a simple float
application.
Bob, note that a "120 vac" power supply may, or may not work on DC. Even
if it does, 120 vac corresponds to 170 vdc. So it is unlikely to work on
72 vdc.
Lee Hart
--
If Valentines are on your mind, here's a daily list to find:
- something to do
- something to look forward to
- someone to love
- someone to take good care of
- and misbehave, just a little
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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