We sold them for years as well, short of Interstate, there was none other that compared. We had a great route driver and salesman though as well, but rarely had to warranty any of them. I took some Interstates on consignment, they saw them and said they would match anything Interstate would give me, warranty, etc. Of course they also said they would match their price...Interstates were 15% more on average! East Penn was a great company to deal with, but that was 10 years ago. Not sure, but I would assume their product was just as good. I had a deep cycle of theirs that ran a 24 volt motor (just one battery) for 4 hours straight to get us up the Ohio River when the gas station owner got drunk and closed shop 6 hours before he said he was when we asked on the way down. Anyway, ran that motor and never seemed to even budge the charge level for all that time!