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Today for the first time this year (system we inherited in our truck 6 months ago) we achieved absorption via solar and dc-dc charging - I saw this when checking MPPT on app when driving.
About an hour later when we were parked up I noticed that a new day had started before/as the system moved into float - and it seems it then went back into abs.
On the screenshots yesterday and today, both are actually today.
We’ve had problems with the system starting a new day in the middle of the day before, and couldn’t find a fix, so learned to live with it. But obvs, don’t want to be going to absorption twice in a day now we’re getting good solar.
I reckon the MPPT is around 10-12 years old (connected via dongle) - is it on the way out?
My other theory is something to do with re-bulk although I don’t really understand it :)
Any ideas on a fix?