Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
Location: CA Bay Area
Mentioned: 9 Post(s)
Quoted: 1123 Post(s)
I am pretty confident it will. Those things take minimal power. I am occasionally running my laptop off 80W inverter in the car. The 80W is marginal supply and with low computer battery on hot days the inverter will overheat, when automatic switch shuts it down, but for occasional use the 80W is all it takes. The 250W inverter I am using in the truck has a fan running constantly what not only takes extra power, but makes annoying noise, so choose your inverter carefully.
If you really want to be safe, you can build the independent battery system. Don't need big battery for what you use, so the smallest car battery should do. Find the space for it, connect to the main battery via at least #8 wire and install combiner on this wire. Combiners are pretty expensive, but other way is to install regular relay, that would be activated with ignition on. Not too complicated.