Review on PolyEnergy Converter Waterproof Refrigerator Replaceable by Sanny Hoffman

I checked all the output voltages and they were all within +/- 0.2V of the gauge. Had it been properly loaded, it might even have been there. It feels very well built. My only problem is that it doesn't run on auxiliary power in a fixed installation. When the power is removed, the output voltage defaults back to 4.9V. For my intended use, this could potentially damage circuitry from low voltage. I found a workaround by leaving it on with my RV batteries and switching the output via a solid state relay and microcontroller with a minimum voltage check built into the code from one of the ADC inputs as an extra precaution. It works for me, so I'm happy with the product! For everyone else, just make sure you select the voltage before plugging in, or install a relay on the output and leave it on battery voltage.