renology controller

rjsurfer wrote:
Not adjustable, I have two of them.

Works fine for my 4 T105's

I'm running 700 watts up on the roof and my specific gravity is always spot on and I'm adding water to the batteries maybe once a month, a simplistic way of checking for overcharging.

Ron W.

That still indicates a degree of "overcharging" though. Might be a little tough on the positive plates shedding too soon or whatever.

I was having that sort of water use this summer with about half that much solar on four 6s during a stretch of sunny weather. Batts got to Vabs mid-day which left a long time till dark. Had to reduce time at Vabs and go to Float voltage earlier, which stopped so much water loss, while still getting the batts to "true full" before dark.

Perhaps with the non-adjustable profile that has the two-hours at Vabs, the way to go in long periods of sunny weather would be to disconnect some of the solar, so it takes longer in the day to get to Vabs but you still get to full before dark. Then when it comes to a cloudier time, reconnect all 700w.

BTW, the actual method with my Eco-Worthy controller was to reduce the "Float" voltage setting to 13.6 from 14.5. That controller has no time at Vabs. It goes to Float as soon as you get to Vabs. So you have to pick a Vabs sort of voltage for the Float setting to get any time at a Vabs. Your level of Vabs would depend on how much daytime is left in that period. Leave it high if time left before dark is shorter.

Solar is not a fire and forget system when the weather changes a lot where you are camping.