Hi Joel,
The system I designed at the Real Goods Solar Living Center was been grid-tied
and on battery back-up for 13 years now, goes back to the non net-metering days
and 2 meters. I did a whole "house" back-up with 2 SW5548's on the lighting
panel and 2 SW5548's on the plug-load panel. PV is about 11kW and battery is
good for 8 hours of store back-up. We kept one office off of back-up so we
would know when a power failure occurs and energy use could be cut back a bit.
All the usual problems of you see over 13 years - inverter issues, batteries
not liking a life in float, CC failures and so on, but agin nothing that we
would not experience on a typical o-t-g system.
Take care old buddy,
-jeff o
>From the Solar, Wind and Hydro powered office of Jeff Oldham/Regenerative
>SOLutions
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