Hi All, I have an AC coupled Radian that is used to back up certain loads when the grid is down. It is paired with the Northstar Blue (Outback) batteries. The system sits in float nearly all the time. During a recent grid outage, the batteries had less than half the capacity that I would have expected, and they are only about 3.5 years old with very few cycles on them.
I tried to talk to Outback about it, which seems to not be possible anymore. I did talk to Northstar, and they recommend not leaving the batteries in float all the time. I am wondering if anyone knows of a way to force the Radian to automatically discharge the batteries to a certain voltage ideally once a week, but could do daily. Essentially, I would like to utilize a time of use schedule where I can force the radian to not use the grid and just use the battery to power the loads for a little while. Ideally this would be automatic, and not require the customer to go through the grid breaker every once in a while. It seems that from the manual, I need to keep the Radian in Grid Tie mode in order for it to be able to sell excess PV back to the grid. Any ideas? Thanks! -Dave -- [image: Logo] <https://www.sungineersolar.com/> Dave Tedeyan, P.E. Owner | Sungineer Solar p: he | him | his a: 1653 Slaterville Rd. | Ithaca, NY 14850 w: www.sungineersolar.com <http://www.sungineersolar.com/> c: (607) 270-0370
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