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I'm looking at getting 4 40 watt PV panels from Sunelec specs are below and wiring them in series to a MPPT charge controller. Any thoughts as to these panels in this application, dealing with Sunelec or the quality of their products?Thank you.Model SUN-40Power (W) 40 WattsOpen Circuit Voltage (V) 21.90 VocShort Circuit Current (A) 2.54 IscMaximum Power Voltage (V) 17.50 VmpMaximum Power Current (A) 2.28 ImpDimensions 22" x 21 1/4" x 1 3/8"$120/ea
OlJarHead, Do you have the SUN-40's? I'm curious if these are a quality or low end panel.As far as going with 4 small panels instead of single large panel, my challenge is mounting them. My cabin is in a wooded area and I expect I'm going to have to get creative with placing the panels to avoid shade. The small panels give me more mounting options and using 4 wired in series allows me to go 48V to my charge controller to cut down on the size of the wire.
This may be an advertising scheme but I looked at sunelec.com today and the price glenn and I gave for our panels have gone up a .10 cents since yesterday and they are saying "PV Industry Shortage is Happening Now!"I wish I had done like glenn and went ahead and got 3 more. Just thought I would put that out there that there may be something to this and that $$ may start on the way back up.
Thanks OJ - I was thinking Phoenix would be the one with their stuff together. I think I have it handled now.
Don,I have a question about the Outback, does it completely power off when the PVs are in the dark or does it stay running off battery power?
Outback FM 60 $525 + $30 battery temp sensorBZ Products MPPT250HV $120 + $30 caseMorningstar TriStar TS-MPPT-45 $415 + $80 display + $30 battery temp sensorThank you.
Anyone know of any information on sizing a post with a certain square feet of PV panels mounted on it?
What really would bother me is losing one of the best tools in my box, the specific gravity measurement! Now that would really be a loss living offgrid!