Solar Help
I have an older Class B motorhome and have been thinking about solar. I can boondock now for 2 days before I have to recharge my 125ah battery. The only thing that draws power is the 12V fridge whic...
Forum Discussion
You get approx. Isc with 12v and PWM as your expected max amps when pointed and the sun is up high, so about 9.5a on the 150w.
Imp and Vmp only get you the named watt size for the panel. You would only see Imp (lower amps than Isc) if the battery voltage got up way high on the IV curve--not going to happen with a controller in the 14s.
That dealer also has a 160w going for $174 not shown on his website table yet. However I would get two 80s instead for the same price (two x $87) for ease of handling, unless shipping cost makes a difference. No idea what his shipping costs are like, sorry.
Each 80w will get approx 5.1a Isc so there is a nice 10.2a package. Isc for the 100w is actually 6.4a marked on the panel, but I get 6.3 actual. But 100/130 x 8.2 is 6.3 so that works for me :) (I have two of the 100s)
The site's table as a few typos in its Iscs etc he hasn't fixed, so check figures if critical. Easy way for Isc is compare with 130w at 8.2 for ratio. eg, 160/130 x 8.2 = 10.1
eg note the typo in the Imp for the 230w panel, but it is correct for the 190w given the Vmps.
Imp and Vmp only get you the named watt size for the panel. You would only see Imp (lower amps than Isc) if the battery voltage got up way high on the IV curve--not going to happen with a controller in the 14s.
That dealer also has a 160w going for $174 not shown on his website table yet. However I would get two 80s instead for the same price (two x $87) for ease of handling, unless shipping cost makes a difference. No idea what his shipping costs are like, sorry.
Each 80w will get approx 5.1a Isc so there is a nice 10.2a package. Isc for the 100w is actually 6.4a marked on the panel, but I get 6.3 actual. But 100/130 x 8.2 is 6.3 so that works for me :) (I have two of the 100s)
The site's table as a few typos in its Iscs etc he hasn't fixed, so check figures if critical. Easy way for Isc is compare with 130w at 8.2 for ratio. eg, 160/130 x 8.2 = 10.1
eg note the typo in the Imp for the 230w panel, but it is correct for the 190w given the Vmps.
