I have about a 10 year old inverter and it's manual came with 2 cautions.
1) It will draw about 1 amp even if nothing is plugged into the 110V side.
If you leave it plugged into a recepticle that gets power with the ignition
in the "off" position it could drain your battery.
2) Don't have it connected to 12V when you start the engine as it may damage
the inverter. I've accidentally done this several times with no damage.
It will not hurt it as it has a low voltage cut out in it anyway. I
think the caustion comes from having a heavy load on it and then
voltage drops durring starting and then comes back up and it could
surge into load attached to it when power is suddenly restored.
I've had a 400W inverter in my truck for years and never had a problem...
It has a low battery shut down and a surge protector or something... when the
inverter is on and the laptop is plugged in and you shut the ignition off, it
pings at me twice when I turn the engine back on.. lol
Also, I think that the newer inverters, especially the brand name ones, have
added a lot of protections...
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.