P30L overcharging?

Discussion in 'Charge Controllers' started by Radster, Sep 20, 2020.

  1. Hi,
    I just installed the P30L in my van, 100 W panel + 100 Ah 12V battery. With a fully charged battery from shore connection previous, I'm finding that the P30L is running the voltage up on the system. The battery voltage is exceeding 18 volts when connected to the panels and I fear its beginning to boil the battery. When I disconnect the panel from the controller, the system voltage immediately reverts to ~12.6 volts (with mini fridge on). Any ideas why its doing this?
  2. I figured it out. I seem to have assumed the controller to have the ability to flip a switch.
    TomT likes this.
  3. Have you checked the battery, to see if you were boiling the electrolyte? Do you have a Battery temperature sensor? Remember, that the panel will charge the battery, at a charge greater than 12 volts, during the day.

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