Voltage drop musings [RE-wrenches]

[mmangelsdorf at hei.com]

Jay and wrenches,
What a mindblowing idea. You are suggesting a 54 or 56 volt DC battery bank,
used with SW5548 and 4048 inverters? Have you successfully done it?
--Yes, I've done it several times successfully.  The systems have been
working now for over 2 years.

Does it work well in all other aspects, besides just MPP matching for
sell-back? Can
it work in gird-backup stand-alone?
--I don't see why not.

Can you EQ the batteries occasionally?
--Yes.

Is DC overvoltage a problem?
--Not as long as you set the SW top DC voltage limit to the max--68.  Also,
set the C40 bulk and float levels at the appropriate voltage levels for a 54
VDC system.

Of course, the real test would be to have two identical systems side by
side, one with a 48 VDC battery bank and one with a 54 VDC battery bank.

marco
proVision technologies
Hilo, Hawai'i


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