I think fungus is right and that the output capacitor is also 35V; I think I was fooled by the angle. So this unit should be conservatively OK with input voltages up to say 20V and current drain of about 1A. In my situation, however, a current restriction is OK, but I will have nominal 24V lead-acid batteries. I might be able to find a 50V (and, therefore, physically bigger) replacement cap though. Ciao, Lenny