spring digital pump controller

I'm looking at upgrading my controllers to the V16 version. Can anyone tell me the difference between the charging version and the non charging version? My batteries are charged using a B2B charger connected directly to the main battery so I assume I don't need the charging version. Before...

Hello, I got some weird problem with the pump controllers. I made an inquiry to several companies, but did not recieve an answer yet. I will post it here. Anybody know a solution? Thanks. " Dear Sir/Miss, We have some difficulties with the Spring Pump Controller Units. We keep getting the...