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bcbob's avatar
bcbob
Explorer
Jun 03, 2016

Low amps from solar panels

I have 2 Renogy 100 watt solar panels flat mounted on my motor home.
19.9 volts from panels to charge controller with a 30 amp inline fuse between panels and CC. Charge controller is a 30 amp PWM. My question is.....the panels can produce up to 5.62 amps each, but are now only producing between 2-4 amps in mid day full sun. Any suggestions on what can be done short of getting on the roof? The volts coming from the panels seem OK, but the amps are way low. Up until a few days ago I was getting between 9-10 amps. Panels are in parallel.
When I remove the inline fuse my amp meter will read the same as the CC.
  • jake2250's avatar
    jake2250
    Explorer
    Jun 04, 2016
    Yeah,, physically go up and check the panels,, we were camping for a week and the first three days I was doing great (two 100 watt panels) 9.5 amps, then it dropped in half after we had a little rain one night,, threw the ladder and had two good size leaves that blew off a tree and got pasted on the panels.
    A good wipe down and I was back to 9+ amps and I was happy!!
  • Old_Days's avatar
    Old_Days
    Explorer II
    Jun 03, 2016
    I think I would go on the roof and clean the panels and look for lose wires. My Renogy panels have the lip on the frame so after a rain they hold a small amount of water.

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