Solar voltage help...
I just connected my solar kit (160w cmp12 controller)and the voltage while connected to the rv batteries reads 16.55v. Is this normal or too high? Sorry but im new to this.
Forum Discussion
BFL13 wrote:
... you need a controller with 20% margin over panel rated Isc...
IGNORE all these people saying you should have a 10a controller.
Morningstar says that their 10A unit doesn't need 20% margin. Alright, ignore them :)...
EsoxLucius wrote:
14.4 volts in bulk and absorption and 13.2 volts in float would not properly charge and maintain my batteries. Hence, the inexpensive controllers won't always give one what is needed. Be nice to your batteries!
Yes. Inexpensive controllers - even from a brand name - will almost never give one what is needed. Non-adjustable setpoints and temp-comp is 2 reasons why, and there are other reasons as well. Cheaper clones of inexpensive brand units may also have reliability issues - their circuit boards are not sealed properly against elements, and all the components are hit and miss, higher possibility that something fails soon or won't work from the day one.
The concept that expensive controllers are expensive only on retail end, is a myth. Expensive controllers (= known brand AND loaded with features) means more investment in R&D, manufacturing and QC.
If controller is just one of toys, than this all doesn't matter. I'm living seasonally in off-grid rig, and need to be able to rely on solar, so units without necessary features or that are not reliable will simply not work for me.
