Small GT inverter question [RE-wrenches]

[Allan Sindelar]

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Wrenches,
Here's (another) interesting one...We have an unusual request from a local
architect whose neighbor to the south wants to put up a multistory building
that would severely shade his business building.

New Mexico has a solar rights law from 1977 that establishes that "the right
to use the natural resource of the sun's energy is a property right. A solar
right is the right to unobstructed light from the sun to a solar collector.
A solar collector means any type of solar device which collects not less
than 25,000 btu's on a clear winter solstice day for the purpose
of: -heating or cooling a building; -heating or pumping water; industrial,
commercial, or agricultural processes; -generation of electricity." Turns
out that the law is still in force, and 25,000 btus is about a 3' by 3'
surface--it's collection, not generation.

This person wants a small grid-tied PV system mounted on his roof in order
to register a solar right and restrict multistory development to the south.
He has a small roof area (I haven't seen it yet), and so the fewest number
of modules possible is desireable.

This is especially relevant in that we recently removed 32 KC120s and Y2K
BOS from an upscale home for one of his professional clients who had bought
the place. These modules will be donated to a local school, but some of them
may be available to the architect to use for this purpose. The KC120s are
12V modules, so minimum voltage is important if these modules are to be
usable here. The Sunny Boy 700 won't work with any module combination, and
the SB1100 needs at least 11 modules, which is too many.

Who makes the batteryless GT inverter with the lowest threshold array
voltage? Which inverters are the best choice for a very small system? Do we
have to use 24V modules anyway?

Any advice appreciated.

Allan at Positive Energy

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