Coleman 2000 Inverter Power Surge

#1
I just bought a Coleman 2000 watt Inverter that runs off of the batteries. I use it for the computer and printer. It seems to be causing a surge that is affecting the lighting that is not run from the inverter but from the batteries seperately.
The lights dim and come back on. The inverter makes a noise and shuts off. We thought when we bought the bigger inverter it would solve problems we had with the smaller inverter as it was shutting off consistently.
 
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