I have a Giandel 1500 Watt Pure Sine Wave Inverter (model # PS-1500KAR), two 12.8V 100 AH Chins batteries, wired in parallel for a 200 AH capacity. Charging isn't a problem.

My current load on this inverter is less than 100 Watts. I have a couple of chest freezers that near the inverter in my garage and I tried to plug in one of them, and the system shut down. I have been monitoring the energy use of these freezers for about 6 month and on their worst days, the both pull a combined 125 watts on average. The highest peak load I have seen on the (again, both combined) is around 580 Watts, but for less than a minute. So my question is why did it shut down when plugging in only one freezer? Do I need to distribute the load between the 2 outlets on the inverter? I know compressors have surge loads, but surely 1600 watts (surge) can cover it? The batteries have a 100 A discharge rate from the BMS, and I think each battery is only seeing 1/2 the load. Thanks.