Derating 24v Solar Panels?
I'm considering running two 250w/24v poly panels; tracked/pointed during spring/fall, and flat during the summer; thru the Tracer 3215BN 30a mppt controller. I can also get 200w/24v mono panels, local...
Forum Discussion
My Can Solar 60 cell 255w has three diodes. Check the owner's manual for which ones you are looking at. Anyway, you can play with how many cells to cover to get what.
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EDIT Quick Test- 60 cell 255w panel
- all in sun Isc 8.79, three cells one end covered (all on one side for half of 6) Isc still 8.77.
As soon as the fourth along (next to middle of panel) covered Isc dropped to 4.4, then when fifth along (leaving only the corner one open, Isc was 0.2 and with all six of the end covered, still 0.2.
You can get intermediate amounts above 4.4 by covering the first three and then part of the fourth.
I haven't tried other combos, but obviously you can tinker till you get what you are looking for.
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Your requirements are changing and you should have the requirements clear before going to design. :)
You haven't even done part of this summer yet on solar to learn what it can do or not, so maybe you will have more ideas by Fall. Meanwhile do some "masterful inactivity" ? What if you get a job at a shipyard in BC or NS? Anything can happen.
------------------
EDIT Quick Test- 60 cell 255w panel
- all in sun Isc 8.79, three cells one end covered (all on one side for half of 6) Isc still 8.77.
As soon as the fourth along (next to middle of panel) covered Isc dropped to 4.4, then when fifth along (leaving only the corner one open, Isc was 0.2 and with all six of the end covered, still 0.2.
You can get intermediate amounts above 4.4 by covering the first three and then part of the fourth.
I haven't tried other combos, but obviously you can tinker till you get what you are looking for.
---------------------------
Your requirements are changing and you should have the requirements clear before going to design. :)
You haven't even done part of this summer yet on solar to learn what it can do or not, so maybe you will have more ideas by Fall. Meanwhile do some "masterful inactivity" ? What if you get a job at a shipyard in BC or NS? Anything can happen.
