Classic going to absorb at 92% SOC

[asdex]

My wife is at the farm this week grafting trees and she read 0.5kW at 10pm which isn't much. I don't see much info on this.
Would this figure be higher if the batteries were more discharged though the day?
I'm expecting this is the case.
If so when I'm there this weekend I'll drain the batteries down more.
It would be nice to have a figure of what the PV panels could have provided on a given day (sun strength, cloud etc) without it being dependent on battery SOC.
Then you could work out efficiency and do some tweaking easier.
I'll get here to re-read again tonight incl AH's and SOC.
Cheers,

[Westbranch]

just for comparison, we have been here for 5 days in a row, with clear skies and torrential down pours ....  yesterday was sunny and the battery started at 82%SoC  we pulled in 4.3 Kwh a new record!

...  Normally we taken in 1.5 to 2.2 Kwh on a nice sunny day, with batteries at ~90% SoC...ABSORB by 2 pm with real charging starting at  ~11:00due to shading... ABSORB Volts set to 27.8V , temp adjusted and battery temp is ~ 19.0* C

[ClassicCrazy]

The SOC is just what is taken out - and then recharged into the battery .

The daily kWh will also include both the SOC amount plus any loads that are being used during the day too.  So if it took 2 kWh to fill the batteries back up to 100%  but  you also pumped water during the day that took 3 kWh then the daily kWh would be 5 kWh .  So all the energy that the controller puts out is shown in daily kWh .

Larry

[asdex]

I see thanks. In that case we should get a high kwh figure tonight as she has the water heating on.
Cheers,

Just got an update from the farm. kWh now 1.9
Battery output 44 amps 27.8v
PV input 1220 watts 77.5v
Batteries in float.

[ClassicCrazy]

If a load  is on at night then that energy use will be reflected in the SOC . 

Larry

[Resthome]

If a load  is on at night then that energy use will be reflected in the SOC . 

Larry

Yep and it would depend on the solar production of the following day to see if it is al put back in and reflected in the next days kW.

We are only on the boat occasionally so here is a sample of output.

[asdex]

Hi, I have a photo of the Classic screen and see 148AH which seems alot for a day from a 1920w PV array.
Does it sound correct?
Picture attached.
Thanks,

[ClassicCrazy]

How many kWh was it for the day ?  On my system that is all I pay attention to and means something to me. It would also be a value that is comparable for others if they have 12v, 24v , 48v systems .
Larry

[asdex]

I thought this reset at midnight each day.

[Vic]

Hi asdex,

YES,  the Ah should reset at 11:59:59 PM,  Local time each day.  The reset may  need to be enabled  --  "  arst  ",  or similar ...   forget.  FWIW,   Vic

[SuperTed]

Hi Asdex
I'd make that a bit less than 4.5 KWh
My Array is about 5Kw and On a fine day in winter we can get about 18KWh with low batteries
in summer with diversion to the water heater (1800W) we have been up to 25KWh in a day
We are In Taranaki, New Zealand
so Looks ok to me
Cheers
Alister

[asdex]

Thanks SuperTed, that does look correct going by your comparison.
I'll hunt around in my log file for the reset at midnight as well.
Cheers,

[ClassicCrazy]

There is a reset at midnight  setting but it is to reboot the Classic at midnite , which some of us have on from when there were some firmware inconsistencies .

I believe the kWh going back to zero at midnight is by default and I don't know if it can be changed - never tried it.

Just thought I would mention that so there was no confusion.  Rebooting also sets the kWh back to zero so that is why it is done at midnight so it doesn't mess with the kWh reading -  but I think the SOC is remembered  and not erased with a reboot.

Larry

[asdex]

Thanks, yes I searched my log file and didn't see a function to reset kWH or AH at midnight.
Cheers,