Not so long ago, we rented a 5 ton straight truck with a large cargo box that had a tailgate loader on it. The tailgate loader was powered by an electro/hydraulic unit just like the one you are talking about. Right next to the switch that operated the tailgate was a decal that warned users to keep the engine running while operating the tailgate multiple times.
This diesel truck had three heavy duty 12 volt batteries in parallel. Those electro/hydraulic systems draw a huge amount of amperage every time you operate them. Before going down this road, you need to find out the size of alternator in your engine and what the current draw is for the electro/hydraulic unit you're considering. Ignore that and you will constantly have battery issues.
This diesel truck had three heavy duty 12 volt batteries in parallel. Those electro/hydraulic systems draw a huge amount of amperage every time you operate them. Before going down this road, you need to find out the size of alternator in your engine and what the current draw is for the electro/hydraulic unit you're considering. Ignore that and you will constantly have battery issues.
