One of the primary challenges pumps can present to any inverter is that the pump's locked rotor current can be five times the inverter's nominal power rating. If your inverter is too small, you may not be able to successfully operate that pump. Let's discuss two other less obvious possibilities and two possible solutions.

A. The pump's wattage is too high.
Let's say you have a 2000 watt pump on one leg of the GS8048A-01 Radian. Because in this example scenario you have 25% of the inverter's capacity on one leg, the inverter's load may be imbalanced and/or the pump's harmonic distortion could be causing the inverter to shut down. If you pull on one side of the inverter too hard, then you may off-balance the transformer. The solution may be to place a soft start on the pump and placing some capacitors between the inductive load.

B. The pump is a 120V pump.
On the GS8048A, there are two 4000 watt, 240 volt power modules. Often, people mistakenly believe that each leg provides 120V to sum 240V, when in fact each leg is 240V. The solution may be to install a step-down transformer like the OutBack Power PSX-240 Autotransformer and two 25A breakers (as each breaker would take a hot wire of 120V) inside the GSLC panel, both of which would go between the Radian and the load. Both legs of the Radian would feed into the PSX-240, so the PSX-240 will take 240 out of the inverter, feed it through the transformer, then step it down to 120V for the pump. The pump would then evenly draw on both legs of the Radian.

Depending on the GSLC model you have, you may be able to install the aforementioned 25A circuit breakers in the same GSLC, however, if you exceed the GSLC's 600V maximum input voltage rating, then you may need another GSLC.