How about this battery bank?

[Almost There]

I was exploring one of the Canadian National Historic Sites yesterday (Bar U Ranch, Longview, Alberta) and came across this battery bank and charger sitting in one of the storage sheds.

Not mobile possible but still - one hugeass big battery bank!



And an adjustable voltage charger!

 

[Crave]

WOW! That looks like it may have vacuum tubes in it.