Likewise, if he just wants to "switch over" his array to supporting a
battery bank, then the Xantrex 80-600 will allow him to charge a bank from a HV array,
and the Classic 250 will allow him to do that from a lower voltage (but still GTI capable)
array.
I think a lot of people think "switches, relays and wires have GOT to be cheaper than a
$600 charge controller!" but often that's because they haven't added up what good (600
volt rated) disconnects and weatherproof relays actually cost.
I think cdevidal showed a plan with no batteries, and changeover to parallel panels
was to be done by hand on a ladder. Any details of this 36VDC high current bus
system haven't been addressed. Bruce Roe
Sure it is. The Radian, for example, does exactly this - supports a fairly large grid-tied PV array and has all the functionality of an off-grid inverter/battery system. But again, that's spendy.
Likewise, if he just wants to "switch over" his array to supporting a battery bank,
Wrong thread maybe? He doesn't want batteries - he just wants to use the grid tied system while the grid is down.
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