This should help solve the issue when the battery does not charge the next day:
Might not be ideal but is working.
I select Dyness as my battery as is what I have, you should select your brand Pylon or whatever.
Then:
SOC 20%
Force Charge 20% - I selected 300W charge rate as the minimum I can select, 5000W is the default.
Self use
ON - make sure all are zeroes on the dates to charge/discharge and you have "Stop" selected , not "Run"
Battery Reserve
ON =>
21% (also make sure you allow charge from grid to Battery)
This is what happens:
Battery goes down normal consumption until it reaches 20%.
At this point the inverter should stand by the battery and power from AC, but this is not the case with the solis, hence the "issue".
Instead, the inverter will power itself from Battery DC from 20% to 19% at a rate of 19W (5W up or down), when it touches 18% (this is 3% less than the Battery Reserve setting of 21%, as someone mentioned) the battery will be charged at max amps (5000W) up to your setting of Battery Reserve pct +1 extra pct, this is
21%+1% => 22%... and then... what we all want, the battery to go to Standby with 0W consumption from battery (inverter to use AC grid if it needs power):
It took ~9 hours to go from 20 to 18% (I have a 9.6 Kw battery system) consuming those 19W from DC, should be less if you have less capacity.
The trick to get the battery to charge the next morning is to setup Backup Supply to "
Disable" in Control Parameter menu.
You can see below, battery is charging. I didn't have to do anything with the inverter this morning.
When Backup Supply was set to "Enable" the issue, as some have mentioned here, is that the Battery does NOT charge the next day.
Tonight I will test something else that might work too and have the battery a bit better charge throughout the winter:
SOC 38% & Force Charge 38% - I selected 300W charge rate as the minimum I can select, 5000W is the default.
Self use
ON (if this is not ON then battery doesn't get used under the battery percentage set)
Battery Reserve
ON =>
39% (also make sure you allow charge from grid to Battery)
Edit: [CONFIRMED IT DOES WORK AS EXPECTED]
What I expect to happen is:
Battery will go down normal consumption until it hits 39%.
Then it will trickle the 19W off the battery from 39% until it reaches 36%, it should then charge up to 40% and go to standby.
Next morning it should charge normal when sun hits panels.
I'll post here how it goes. if anyone is doing alternative tests and / or confirm the theory it would also help!
Next tests could include to use the Custom Self Define parameters as
@SeaGal mentioned in the earlier post
#29
to try to get the inverter to just put the battery to standby when it reaches a certain percentage the first time it happens, and avoid to have to set all this up to force the battery to be recharged once to get the standby activation and the 19W consumption from DC instead AC.
Battery doesn't need this extra stress and usage, would increase its life & performance.
Also, the "recharge" at 5000W does also come from AC to battery DC and it consumes extra energy to do that, not sure why Solis is forcing this behaviour.
PS: if you don't have the A10037 firmware, this should also work, but you would see incorrect W in the DC usage of battery.
I used to see 62/63W before, however my Dyness app was telling me 19W which does match now the inverter figures.
as I don’t know if 100% safe for my battery type, I have Dyness and I select that, cannot specify custom DOD when I pick Dyness, only SOC and Forcecharge.
