This product solved the problem I had where I could not charge my EB3A from my non-inverter backup generator. 10K Inverter generators that run off Natural Gas do not seem to be available so it is important to be able to charge from any generator that is available to you in a power outage, particularly on cloudy days. I also have the the DC car charger and Portable Solar panels so this offers one more option. The adapter basically just simulates 200 watts of solar and uses the same DC input on the EB3A as other DC options would use.