Steca Solsum 6.6F charge controllers
I recently got two of these small charge controllers for my bus's two Group 31 starting batteries, with each one connected to one battery. They are powered from the bus's 2kW of PV panels, with each one fed by four panels through a 7.5A fuse. Steca's instruction sheet says that they should be powered by a maximum PV current of 6A - my setup is obviously a little bit more than that! The problem is that one CC always blows its 7.5A fuse, and the other CC is boiling the battery with almost 16V. Evidently I'm simply overpowering them.
So, is there a current limiter that will limit each of these CC's input power to just 6A? How else can I use these little CCs with my bus's panels without overloading them? I REALLY don't want to have to install one or two small PV panels just for them.
40' Crown bus with 2kW of panels on the roof:
Eight tiltable Sharp 255W, two Morningstar TS-MPPT-60, Magnum MS2000, Champion C46540 generator converted to propane, eight golfcart batteries, and maybe a small Exeltech inverter for the fridger.