No spec tread but I know from research the output is around 35-36A DC on the Gen 1, the weather proof storage on the Gen 1 is not suitable for battery through that waterproof cover either. Must an x series upgrade for it, all the owners who have done it are in the X group. The regulator is a shunt type regulator, which is burning off unused power as heat if its not used. I haven't seen a marine switch mentioned but likely a good idea to have manual control of which battery you're loading up. Leaving the other unaffected.