On 07/29/2020 16:35, Willie via EV wrote:
Perhaps you can comment on some trouble I've run into.
After observing that some microinverters worked on battery input and
that string inverters worked well with combined strings of both east
and west facing panels, I became convinced that a single microinverter
could serve one east facing panel and one west facing panel. The two
panels connected in parallel to the microinverter. Tests were
disappointing with generally a microinverter, over a day, producing
less energy than had it been attached to either a single east facing
panel or a single west facing panel. Slopes on the panels are 15-20
deg from vertical so that panels are shaded around 30% of the day and
both E and W receive sun about 30% of the day. It is semi-clear that
even a shaded panel interferes with production from the not shaded panel.
String inverters can do "double duty", producing from east facing
panels early in the day and west facing panels late in the day. With a
smooth change over at mid-day. Microinverters seem unwilling to do
that "double duty".
Diode isolate them so that when one panel is not in the sun, it will
functionally be removed from the circuit.
--
73
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Jim Walls - K6CCC
[email protected]
Ofc: 818-548-4804
http://members.dslextreme.com/users/k6ccc/
AMSAT Member 32537 - WSWSS Member 395
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