Brand new 50A 1000V Stud blocking diodes for Solar Panels and Wind Generators.  It prevents the current from being drained from the battery bank when there is no solar power or the wind generator is not running.  It can handle up to 1000V so can even be used for high voltage systems.  Free shipping by first class mail in the US.  We have them in 25A, 40A, 60A and 85A versions.  Check the other auctions.  Contact us if you need large quantities for a good discount or amperage from 1 A to 300 A.