My solar system has been working fine for almost a year, then suddenly when repeated power outages occurred for 30 days in a row every morning from 1;30am to 6;30am my batteries started running flat.I have two sets of 4 x 200a/h batteries in parallel. Drawing about 500watts from the inverter during this period .Eventually I sat there and watched the charging cycle as it happened and noticed time and again the bulk charge cycle jumps straight to float cycle,as soon as it reaches 56,4v setpoint. Then it just idles there until the next power outage.It does not go into saturation. I tried everything,changed setting no.2 from 50 to 30 to 40 to 60 and it made no difference.Eventually I found setting no.32 was set on aut, so I changed it to 360 minutes and presto,my batteries are charging and the system is saturating.

My question is what is the best time advised to set this saturation time(32) on.?

15 hours ago, Trace said:

My question is what is the best time advised to set this saturation time(32) on.?

I have no idea; I have been suggesting 60 minutes as a wild guess. I suspect that any fixed period of time will be a compromise: sometimes too short, not charging the battery enough, and sometimes too long, stressing the battery unnecessarily. Which of these is the case depends on the cloud/sun pattern for any particular day.

If you have a PIP-4048MS or equivalent, then you should be able to run patched firmware that fixes this problem properly. Check this post to see if you can run patched firmware, and if so what version.

Thanks for your reply, Much appreciated.Will attempt what you suggest.