BFL13
Feb 07, 2014Explorer II
Panels For Mena
Mena will be using PWM so Isc and panel cost is what counts. He was looking at two 150w panels with Isc of 8.95 and $165 each.
So that is lower Isc than usual for 150w (9.46a usual) but cost per Isc amp is $330/17.9 = 18.43 cents.
Compare with same brand's 120w panels at 7.5a and $132. Get three panels for $396/22.5 = 17.6 cents
Now look at the Evergreen 120w at 7.68a and $114 Get three for
$342/23a = 14.9 cents
http://www.solarblvd.com/Solar-Panels-&-Systems-12-Volt-Solar-Panels/c1_269/p2833/Evergreen-EC120-120-Watt-12-Volt-Solar-Panel/product_info.html
So compared with the two 150s, for another $12 he gets 5 more amps. (5 amps is normal Isc for an 80w panel BTW)
Also the frames on those 120s are 1.4" instead of 1" so they should be stronger for mounting.
The only thing is roof real estate open spaces for what will fit where and if mena can do three panels.
Any more ways to spend mena's money for him? (He already bought the 45a PWM controller so we have to work with that.)
So that is lower Isc than usual for 150w (9.46a usual) but cost per Isc amp is $330/17.9 = 18.43 cents.
Compare with same brand's 120w panels at 7.5a and $132. Get three panels for $396/22.5 = 17.6 cents
Now look at the Evergreen 120w at 7.68a and $114 Get three for
$342/23a = 14.9 cents
http://www.solarblvd.com/Solar-Panels-&-Systems-12-Volt-Solar-Panels/c1_269/p2833/Evergreen-EC120-120-Watt-12-Volt-Solar-Panel/product_info.html
So compared with the two 150s, for another $12 he gets 5 more amps. (5 amps is normal Isc for an 80w panel BTW)
Also the frames on those 120s are 1.4" instead of 1" so they should be stronger for mounting.
The only thing is roof real estate open spaces for what will fit where and if mena can do three panels.
Any more ways to spend mena's money for him? (He already bought the 45a PWM controller so we have to work with that.)