12 volt to 110 through an inverter

[dirt33]

I don't have a great comprehension of electricity. But, I do know that this forum is great for knowledge and ideas.

In my TT, above the TV in the entertainment center, there is the standard Winegard wall plate that has both a 12 volt outlet as well as the antenna booster. The 12 volt socket on that plate reads "8 amp max".

I use a Stanley 130 max watt inverter to plug into that 12 volt outlet, and I then plug the Vizio TV into that inverter to watch it when not hooked up to shore power. It works fine. However, there is a problem it seems when using other 12 volt power. The switch for the water pump is on the outer wall of the entertainment center, basically "just on the other side" of the entertainment center wall from the 12 volt outlet. When watching TV, anytime any faucet in the trailer is opened enough to kick on the water pump, the TV immediately loses power and shuts off. Once the water pump shuts off, the TV turns back on just fine when using the remote to power it back up.

I do have a different 12 volt outlet that I installed last year, it is located under the dinette and wired directly to the power distribution panel. This past weekend, when the "water pump causes the TV to shut off" problem happened, I unplugged the inverter from the factory 12 volt outlet in the entertainment center, and plugged it into the 12 volt outlet that I had installed. I powered on the TV, and then ran the water pump, and the TV stayed on.

So... is my problem simply that the original 12 volt outlet in the entertainment center is not able to provide "enough" power, due to sharing the wall plate with the antenna booster? Or, is there some other problem, perhaps with wiring? Is my 130 watt inverter too small? (it doesn't seem like it to me, given that it did work fine in the "other" 12 volt outlet...?)

Thank you.