Don't know how much energy it takes to separate the hydrogen, but Iwould think you'd need a battery array to power it when the solar cells can't (like under the trees). If solar cells are 20% shaded they loose about 60% of their productivity. Don't exactly understand it, but I think it's sorta like having a dead battery in with some good ones. It just doesn't work right.

97tj, Shaved Ford 9 rear, 4:10's, New 35x12.5 BFG KM2's to test!, Warn x8000i, ARB's, Quick Disco's, Hand Throttle, & it's my DD. smile