Plan changing overnight so I don't have enough charge for the day

[rknight20772]

Hey

Ive recently added a 2nd battery to my GivEnergy setup, so now ive got 20kwh of storage as I tend to run out towards the end of the day.

I was expecting predbat to use this capacity by fully charging overnight during the IOG cheap rate, then have lots of energy to use during the day, with a forced discharge towards the end of the day.

When I check the plan before I go to bed, that's exactly what the plan shows. But when I wake up in the morning, the battery is usually at less than 30%, so I end up back in the same situation, running out of energy about 5pm as the solar forecast is almost always wrong.

Looking at the messaging, I see the following (as an example from last night)

23:30 - Predbat status change to: Charging target 5%-100%
03:30 - Predbat status change to: Exporting target 73%-41%

This is from the app pop ups - not sure how to get the actual logs.

Is there any way to make sure I have a full battery ready for 530, and that no export happens during the cheap rate window? Whilst its only an irritation at the moment, in a few weeks time the electric underfloor heating for the bathroom will be coming on, and Ill need the energy more at the end of the day.

[gcoan]

Predbat is doing a cost optimisation for you, and if you're on an EV tariff where overnight import rate is less than export rate, it's quite normal to get an overnight charge / discharge / charge cycle.
But I would expect that your batteries are filled by the start of the day and any solar exported next day as this would be the cheapest plan.

You'd need to supply your debug file and log file to enable better investigation.

[rknight20772]

Hey
Thanks for the reply.
Here is the log file. Ive enables debug and see if I get the same this evening.
Looks like the change happens about 03:40 in the log.

predbatlog_excerpt_0335_0415.txt