Bypass / Blocking Diodes
Here is the situation: I have 2 roof top panels (95W GoPower, Imp 5.53, Vmp 17.2) mono and a 100W Windy City (Imp 5.75, Vmp 17.4) poly panel wired in parallel on the roof. No room for more. For l...
Forum Discussion
LOL, then they're both wrong. If the controller is outputting the exact same voltage in both conditions then the battery MUST get identical current. Current is dictated by Ohm's Law:
I_charge = (V_controller - V_battery) / R_cable
The only way charging current can be different is if the charge controller output voltage changes.
When in float, doesn't matter if you have one panel or 10 panels connected to the controller, charging current will be the same. Charging current is not dictated by the number of panels but what the battery will accept at your float voltage.
I_charge = (V_controller - V_battery) / R_cable
The only way charging current can be different is if the charge controller output voltage changes.
When in float, doesn't matter if you have one panel or 10 panels connected to the controller, charging current will be the same. Charging current is not dictated by the number of panels but what the battery will accept at your float voltage.
vermilye wrote:Salvo wrote:
Interesting scenario.
My money is on measurement error. When in pwm mode, the battery gets the same average current (over the time period of one complete pwm cycle) whether 4 panels are connected or 2 panels.
Get yourself a better amp meter.
The current measurements are with the same meter, ie the GoPower controller or the TriMetric battery monitor. Both show the drop in output current when the portable panel is added when the controler is in float...
