I have the batteries that I think will work. I bought an electric golf caddy at a yard sale for $5 and it came with a good 12v 33ah deep cycle wheelchair type battery
. I found another similar battery at work that I'm borrowing for the 24v tests. I'll see if the boss will sell it to me.
The inverter will go up to full power off these batteries and hold close to 500w for a while. The problem I'm having now is with the inverter running too hot
. It apparantly doesn't like to run at rated power off batteries for more than 10-15 minutes or so without going into overheat mode. I've been trying to thermally improve it by mounting it to a large heatsink with thermal grease, and adding extra heatsinking to the hottest area. This helped but I think I'm still going to have to add a small fan that blows across the hottest area while in 24v mode. At least it won't be using 24v mode as often as 12v mode (unless it catches more wind than I expect).
