Hi all. I'm shopping for an inverter for my Prius, and am on the fence on which to get. I'm an electrical engineer, but I figure someone has already researched this and if so, it would save me some time. Is the 12V battery big enough to power a 1500 W inverter at full load? I just realized my automotive knowledge from the past doesn't necessarily apply for a Prius, since it doesn't need a bunch of cold cranking amps from the 12 V battery to start it. I haven't yet looked up the specs of the 12 V battery. I found a nice UL Listed 2 kW inverter at homedepot.com for about $160. Thinking about it 2 kW @ 12 VDC = 167 A draw. It should yield about 14 A out @ 120 VAC, which is about the equivalent of a typical branch circuit in the home. Thinking about it, 167 A draw from the 12 V battery is probably too much. A 1500 W inverter would draw about 125 A. Also probably too much. 1000 W inverter would be more like 83 A, which might be in the "reasonable" ballpark, depending on how beefy the 12 V battery is. In any case, it may be a higher load than the battery sees in normal use and toast the car's 12 V battery. (or at least accelerate it wearing out...) ************* The other option, using the traction battery, is better electrically. Higher source voltage = higher efficiency, (around 97%!) and the resulting input current would be a lot lower too. 2 kW @ 240 VDC is only 8.3 A. However, a good sinusoidal, UL Listed 2 kW inverter runs $700. It would also require a wiring custom harness, which will cost some bucks too: a DC fuse, fuseholder, appropriate heat-shrink tubing, welding cable, Andersen PowerPole connectors... This will probably add up to another $100 at least. So we're talking in the neighborhood of $800 for this path, though it would be more useful in a power outage situation. It could run a fridge, modem and WiFi router, etc. A Google search sent me to some older threads, where someone had considered it, but it was obviously for a different Prius and all the pix were missing.