November 26, 2025Nov 26 HiI've got an issue with my inverters not prioritizing battery and solar. Instead, the grid is being used even when I've set the time of use to draw solar and battery. The result being that my batteries are always at 100% and municipal power is being used even though there's ample battery power.This problem only started after I added an inverter to my original one. Any suggestions would be highly appreciated.
November 27, 2025Nov 27 @JK84 please tell us more about the inverters and the battery. Make, model, capacity.
November 27, 2025Nov 27 39 minutes ago, Bobster. said:@JK84 please tell us more about the inverters and the battery. Make, model, capacity.HiIt’s 2x Deye 8kw Inverters in parallel connected to 5 x 4.8kwh Pylontech batteries.
November 27, 2025Nov 27 It might be unrelated but I have had issues of late with enabling/disabling the time of use remotely, specifically on the new model Deye 8kWs. Has it been set on the inverters manually?
November 27, 2025Nov 27 Author 7 hours ago, Shadders said:It might be unrelated but I have had issues of late with enabling/disabling the time of use remotely, specifically on the new model Deye 8kWs. Has it been set on the inverters manually?Yes, I've set the time of use on the inverter manually.
November 28, 2025Nov 28 When you installed the 2nd inverter did you do firmware update?What are the settings for:Battery 1Battery 3System work mode 1System work mode 2Advanced Function 1
November 28, 2025Nov 28 1 hour ago, Shadders said:It might be unrelated but I have had issues of late with enabling/disabling the time of use remotely, specifically on the new model Deye 8kWs. Has it been set on the inverters manually?HiYes, I’ve set the time of use on the inverter manually.13 minutes ago, Shadders said:When you installed the 2nd inverter did you do firmware update?What are the settings for:Battery 1Battery 3System work mode 1System work mode 2Advanced Function 1Yes, the installer confirmed that the firmware was updated on both inverters.I’m attaching pictures of inverter settings and also of the setting from the Solarman app
November 28, 2025Nov 28 A couple of comments:- I would normally set zero-export power to 20-40W to prevent prepaid meters from tripping. If you haven't had problems don't worry about it
November 28, 2025Nov 28 Check battery %. You've instructed that it would use the battery only in slots 2 and 3, and then only to 70% DOD. For the rest, it should stay at 100%.
November 29, 2025Nov 29 Sorry I had a meeting and did not get a chance to complete my post, following on from earlier:- Personally I would drop SOC earlier in the morning so there is battery capacity for the panels to work closer to their maximum capacity rather than just matching load. You will save more electricity and make better use of your investment. It's nearly impossible in most applications to reach the warranty number of cycles so use the batteries more i.e. in the early morning hours before the sun comes up. Typically I go as low as 40% and as high as 60%- time slot 1, 2 (and maybe 3) I would untick grid charge. If you hit the stated % it will hold at that value but not charge from grid. You only really need to charge to 100% in the evening to give backup for the evening
February 1Feb 1 On 2025/11/28 at 3:14 PM, CobusK said:Confirm these settings Confirmed. These are correct.
February 1Feb 1 Author On 2025/11/29 at 10:19 AM, Shadders said:Sorry I had a meeting and did not get a chance to complete my post, following on from earlier:- Personally I would drop SOC earlier in the morning so there is battery capacity for the panels to work closer to their maximum capacity rather than just matching load. You will save more electricity and make better use of your investment. It's nearly impossible in most applications to reach the warranty number of cycles so use the batteries more i.e. in the early morning hours before the sun comes up. Typically I go as low as 40% and as high as 60%- time slot 1, 2 (and maybe 3) I would untick grid charge. If you hit the stated % it will hold at that value but not charge from grid. You only really need to charge to 100% in the evening to give backup for the eveningHiThanks for this. The system is still:- Keeping batteries at 100% throughout the day and night.Drawing from grid when the house requires more than the solar being produced as opposed to covering the shortfall from the batteries. Edited February 1Feb 1 by JK84 Clarifying the issue
February 1Feb 1 On 2025/11/28 at 3:20 PM, CobusK said:Ensure battery settings are correct These are my battery settings on the master unit.
February 1Feb 1 silly question but under system work mode are all days are ticked? try lowering your tou battery percentages and then also run a test by unticking grid charge under tou settings. bit of trial and error
February 2Feb 2 11 hours ago, Mattyboy said:silly question but under system work mode are all days are ticked? try lowering your tou battery percentages and then also run a test by unticking grid charge under tou settings. bit of trial and errorHiYes, all days are ticked and grid charge is unticked for all time slots.
February 2Feb 2 Two issues bugging me.If you have 5 x 0.5C batteries installed, why are you seeing a 200A discharge limit and not 250A Is the Pylontech spec? Are all the batteries communicating to the inverter? What happens when you run with the battery settings in Voltage mode?On one of the screens above the power inflow and out from from the inverter doesn't match. Around 2.05kW PV, but almost nothing from battery, but then 0.98kW going to loads and 2.68kW exported to grid. Was this transient? Any chance there's a problem with the CT coil fitment?
February 3Feb 3 On 2026/02/01 at 1:18 PM, JK84 said:Thanks for this. The system is still:- Keeping batteries at 100% throughout the day and night.Drawing from grid when the house requires more than the solar being produced as opposed to covering the shortfall from the batteries.Post the current settings on Main Inverter 'SYSTEM WORK MODE' 2 (2nd Menu)This menu Edited February 3Feb 3 by CobusK Add image of SWM 2
February 5Feb 5 On 2026/02/03 at 4:50 PM, CobusK said:Post the current settings on Main Inverter 'SYSTEM WORK MODE' 2 (2nd Menu)This menuHi
February 5Feb 5 Is this your master or slave inverter? Please post all system work mode and battery settings screens for the master inverter.
February 5Feb 5 40 minutes ago, GreenFields said:Is this your master or slave inverter? Please post all system work mode and battery settings screens for the master inverter.Posting setting from the master.
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