Forum Discussion
Salvo
Mar 18, 2015Explorer
So your data is not from a typical charge profile.
I have 130W and usually go into absorption by 1 pm. Unless you're really using a lot of power, with 500W, the battery should be in absorption by noon. That means max charging current is cut back.
I would add an amp meter (or Turnigy Watt Meter) to the charge controller to monitor max current. Otherwise, you're in the dark whether to switch one panel off or not.
I have 130W and usually go into absorption by 1 pm. Unless you're really using a lot of power, with 500W, the battery should be in absorption by noon. That means max charging current is cut back.
I would add an amp meter (or Turnigy Watt Meter) to the charge controller to monitor max current. Otherwise, you're in the dark whether to switch one panel off or not.
CA Traveler wrote:Salvo wrote:I wanted to determine the panel and controller output capability and used the inverter, etc to draw the maximum amps from the controller. The controller kept the battery voltage at about 13.8V.
What was Vbat when charging at 43 A? Was it held down?CA Traveler wrote:
As another reference point my 3x250W flat panels on 3/3/15 in Phoenix with a clear sky produced 43A or 600W at the controller output. This was for 1.5 hours before the clouds moved in. There were several peaks of 48A. For 2X panels this would product 28A or 400W.
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