I have a small boat which I power with 2 x 24volt, 2000 watt, Electric motors. They are connected to 2 x 12v 100ah batteries wired in series for 24v. I have 2 x 200watt solar panels to charge them (given enough days between use). I decided I needed to supplement the system by adding a DC generator to the system for when I need more run time than the batteries can provide. So I looked around and finally found a 24volt 5000watt, Inverter controlled, auto start generator. Unfortunately it was from Asia and fairly expensive with shipping and everything but against my best judgment I ordered it. When it arrived it had a small sticker on the generator saying 72volt. I tried returning it but I would have to pay all shipping costs both directions which is out of my budget so I'm stuck with it. So the first thing I did was get six batteries (72v) to try and start it. Nothing happened when I pushed the start button (no surprise). So I used the backup manual pull start and it started. Then I put a multimeter on the output and it said it was putting out 24v at idle and 60v at full throttle. Is there any way I can safely connect this to charge my 24v batteries? I admit I'm a amateur at this.