Posted by cylurian on June 8, 2009, 6:18 am
If a charge controller is rated at 12 V and 7 A; does that mean the
max output I can have for the panels are 7 Amps? Or does that mean
that it will only change batteries that are less than 7 A-H?
Posted by Blue Cat on June 8, 2009, 1:44 pm
A charge controller rated 12 V and 7 A is designed to work with solar pv
panels that will charge a 12 volt battery. Typically the input voltage could
be as high as 18 volts (But check the specs to be sure). The 7 A reting
means that it cannot take more than 7 A to charge a battery without damage
to the device. This means that the pv panel you connect to the charge
controller must not output more than 7 amps.
You can connect the charge controller to pv panels with lower current
output, and it will charge batteries with no problem. It will only take a
little more time.