Lux ac battery controller

EVandPV · 21 March 2021 at 9:52AM

Starfrog said:

Hi Scott, I guess my issue is i dont have any charge settings set and in the middle of the night and very early morning my battery starts recharging from the grid when it falls below 10 or 6 % I’d rather that it just didnt draw any further power from the grid until the solar starts and theres power available for free to charge it. So it gets recharged during the solar day and then discharges around late evening then for some reason it will get recharged at night up to about 10% or something (i cant see as i tend to sleep then! But not sure what data information will give me the percentage it was charged from and too during the night. Its not a full charge its I’d rather it didnt do any till solar output, and then only from solar until i get my smart metre and i can choose the time and use it effectively. Would there be a specific reason it needs to recharge from a low point below 10 to go back to 10% ?

It should just cut out at 10% or whatever DOD is set.
Can you post a pic of your charge and discharge settings.
You can see what's going on with your soc under the data tab on the web portal. The graph in the top right.

Starfrog · 21 March 2021 at 10:12AM

I think my Aoboet batteries can go lower discharge if I’m not mistaken but here’s the settings i think you mean but there is nothing on them and thats after ive pressed the read button to load the settings. If the battery goes below 10% would it just charge to that level regardless and if so why cant it just wait until the solar is up ?

EVandPV · 21 March 2021 at 10:20AM

I was forgetting you have Aoboets, could be that they have something in the BMS that makes them top up to 10% if they go lower.
But they shouldn't be discharging below 10% in the first place, the Lux should cut off at 10%.

mickyduck55 · 21 March 2021 at 10:23AM

Settings look fine... My Pylons charged all day once during the winter at a very low rate even though everything said dont.. I can only guess that the BMS decided they needed a proper charge as they had been dragging on at 20-40% for days. Clearly this is not the case for you

Starfrog · 21 March 2021 at 12:26PM

My issue is I just haven’t been able to get into the BMS for the batteries, I’ll follow up with the installer as it would be good to see settings (not that any of it would make sense to me at this point but its a start) and see why its choosing to just do a 30 min recharge at some odd hour in the middle of the night.

Starfrog · 21 March 2021 at 12:29PM

EVandPV said:

I was forgetting you have Aoboets, could be that they have something in the BMS that makes them top up to 10% if they go lower.
But they shouldn't be discharging below 10% in the first place, the Lux should cut off at 10%.

I see them go to 6 % often and then always seems to stop at that discharge level

mickyduck55 · 21 March 2021 at 12:30PM

You have had issues with the data right from the install? From the settings displayed the batteries should not go below 10%

Starfrog · 21 March 2021 at 1:35PM

I wonder if I should set that as 6% then ? as it appears to go below 10% (because its able to do that being aoboet) and then it shouldnt keep charging it back up to the 10% it says for the Ingrid that way it will only charge again when the solar PV give sit power ?

EVandPV · 21 March 2021 at 1:42PM

Starfrog said:

I wonder if I should set that as 6% then ? as it appears to go below 10% (because its able to do that being aoboet) and then it shouldnt keep charging it back up to the 10% it says for the Ingrid that way it will only charge again when the solar PV give sit power ?

You could certainly try that but I wouldn't worry too much about it charging your batteries by 4%.
That's a tiny amount of power (4.8kwh x 4% = 0.192kwh) so your talking 1 or 2 pence at most.

Starfrog · 21 March 2021 at 1:59PM

Im all about incrementals, all those little things together make a difference 1 or 2 pence per day is either £3.56 or up to £7.12 per year ! can you tell I'm Scottish

but yes agreed its not worth worrying about but I look at the usage and it doenst make sense. If you look below for some reason yesterday it decided to start charging again when it was at a 6% at around 01:55 it decided to then go all the way to a 24% charge from the grid alone as there was no solar at that time 02:10am ! and I cant think of anything pulling from the grid at that time as I cant see anything on my consumption data ? the data just doesn't seem to match