Battery Voltage drop when running my 600w invertor

• CM

  Carlo Monaghan

  10/25/24, 3:29 AM

  Hi newbie here, 

  I purchased the following kit:

  ECO-WORTHY 200 Watt 12 Volt Complete Solar Panel Starter Kit for RV Off Grid with Battery and Inverter: 2pcs 100W Solar Panel + 30A Charge Controller + 100Ah Lithium Battery + 600W Solar Inverter

   

  I've hooked up some outdoor patio lights to the invertor. The battery voltage is around 13.1v but when I turn on the lights the battery voltage drops to 11.1v and when I turn them off will go back to normal 13.1v.

   

  I did a test and allowed the lights to run for 15 minutes. On the charge controller I was getting an E01 error and the invertor displayed 10.7v. I stopped the test here as I didn't want to drain the battery and get a low voltage error once it hits 10.4v. As before the voltage jumped up 2v and would sit at 12.7v on the charge controller and invertor displays.

   

  Is this normal?  Do I need a larger battery bank? I was expecting to get a few hours of running time at least.

   

  Thanks

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• V

  Vadim

  11/26/24, 4:54 PM

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• rg

  roger grinstead

  11/28/24, 4:00 AM

  @Carlo Monaghan 

  what size wire do you have from your battery to your inverter? How many lights do you have and their wattage? You only have 600 watts to play with. Should be running led to get the most light for the power. 

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