Unfortunately, the Customer Service at SS is singing a different tune:
"Due to miscommunication between the manufacturer and us we will no longer carry the 48V 25A chargers. I do apologize for this inconvenience.
With that said, we have 2 solutions you can choose from.
1) Keep the 48V 18A chargers, we will issue you a refund for the price difference.(48V25A$259.99 - 48V18A$199=$60.99) On top of that we will issue you a $50 credit to use on a future purchase.
2) Return the chargers and receive a full refund less the shipping cost to you."
@RichardfromSignatureSolar