Saw some news about DC mppt..
Solaredge Launches New Top Efficiency Power Optimizers and PV Safety Innovations at Intersolar Europe | SolarEdge Technologies
YouTube - ‪SolarEdge: maximum PV energy at a lower cost - Part 1/3‬‏
It's an idea that I've been thinking about using, since I have a lot of trees around.
Maybe it's possible to DIY some little boards for each panel, that would
do MPPT on it's panel and then discharge it's stored power at the MPP voltage of a fixed value (per the PV spec).
This should keep any panel (
in a parallel config) from dragging the others down with low voltage. (due to shading).
A shaded panel would not even be connected, until it had charged up it's storage capacitor to spec voltage.
It has been my experience that a shaded panel that's not loaded down,
(open) will still have a pretty good output Voltage (not much amps),
but the
voltage will normally exceed the spec MPPV..
So, the function of the DIY circuits would be to isolate any panel,
until it
could contribute it's stored (capacitor) power at higher voltage (MPPV).
The paralleled panels would be pulsing off and on, delivering power pulses to the load.
If any panel was seeing full sun, it would not be isolated, unless the load
pulled down the buss voltage. When that occurred, the DC MPPT board
would disconnect and wait until it had full spec voltage and pulse it to the buss.
Kinda like a poorman's Enphase (but in DC)..
Seems like a good idea,
at this time..
