If you're asking if we've tried this hooked to the tractor...no. But, what is it you're forseeing as a problem? I have had small 2A battery charger hooked to it to keep the battery up during tests.

I also ran the battery withOUT any charger hooked to it while cycling the compressor on fillups after draining the tanks. I thought it would pull the battery down faster w/no charge, but I got tired of trying to do that & just gave up.