Originally Posted by brownoarsman
It's a 410 watt inverter
with a surge rating of 810 watts. The crockpot is 70-90 watts continuous load at these settings. I've installed it according to the manual which merely called for plugging it into a 12v outlet. It's possible the 12v outlet can't supply the load, which is why I was going to try clamping it to the battery
(or the perko switch because it's easier to access) tomorrow when I can contort myself into the laz again.............
That would be the next test, connect the inverter
directly to a 12 volt boat or car battery
. There's no telling how much voltage drop there is in the wiring
to your boat's 12 volt outlet.
What I'm not reading in your post is any mention of overcurrent protection. We can assume that there is a fuse or circuit breaker protecting the wiring
to the 12 volt outlet but if you're going to wire this inverter to the battery, the wiring will need an appropriate sized fuse or circuit breaker within 7 inches of the source of power.
Because the resistance of the conductors matters more at 12 volts than at 120 volts, your best plan is to keep the 12 volt wiring as short as possible and extend the 120 volt wiring to where the crockpot or other load will be.