Solis inverter unable to update charge/discharge to 100A

Stefs_42 · 22-01-2026 03:34PM #1

Hi guys,

Need some advice from ye techie gurus 😁

Currently I have 10kwh dyness storage battery linked to inverter and I also upgarded my system with a beefy 35kwh lipo04 storage all connected to inverter but Im unable to update charge/discharge to 100A. Currenlty set to 20/30A. My current inverter model S5-EH1P5K-L should be able to pull 100A as per data sheet. However if I try updating and saving settings to 100A it reverts back to default 20/30.

Got in touch with Solis, they said its because dyness BMS is restricting inverter.

Would only option be disconnecting comms cable from dyness? How do I go about setting up my inverter then? That also means I wont be able to monitor my batteries via solis app. Should I be worried over this?

Any suggestions how to set this up properly will be greatly appreciated🙏

20260120_094056.jpg

20260120_094411.jpg

20260120_094615.jpg

conor_mc · 22-01-2026 05:21PM

I wrestled with low current charging recently (Solis with GobelPower battery) and it was a battery firmware update that resolved the issue for me. That said, it wasn't quite the same issue as yours - the settings weren't changing but the impact (slow charging) was the same.

graememk · 22-01-2026 06:06PM

You can set it to user defined and still keep the soc from the battery

@...Ghost... do you have a video on the solis battery settings? (It's gary does solar on YouTube I think)

Stefs_42 · 22-01-2026 06:12PM

https://www.boards.ie/discussion/comment/124171053#Comment_124171053

How do I do that graememk?

...Ghost... · 22-01-2026 06:33PM

https://www.boards.ie/discussion/comment/124171053#Comment_124171053

Different Gary 😁

Gary On Power

https://www.boards.ie/discussion/comment/124171066#Comment_124171066

Here you go. There are 2 videos on the settings. Worth watching both.

https://www.youtube.com/watch?v=FVT_r_RAccQ

https://www.youtube.com/watch?v=twyEcR7SCKY

graememk · 22-01-2026 08:27PM

https://www.boards.ie/discussion/comment/124171131#Comment_124171131

Whoops at least I tagged the right person here 😂

Stefs_42 · 22-01-2026 08:46PM

https://www.boards.ie/discussion/comment/124171131#Comment_124171131

Unfortunately non of his suggestions work☹️

I have tried changing battery type to user defined and updated charge and discharge to 100A. However after saving parameters inverter reverts back to 20/30A.

Was onto Solis, they said that firmware on my inverter is up to date.

So what other options can I have in this case?

...Ghost... · 22-01-2026 10:37PM

https://www.boards.ie/discussion/comment/124171489#Comment_124171489

What battery(s) do you have?

Never mind…I see it's a dyness from the first post. The settings in the videos above are mainly aimed at those with DIY batteries, because you can change the BMS settings easily on the battery. I'm not an expert, but I think it is likely the BMS settings are limiting the charge/discharge rate.

mjatkey · 22-01-2026 11:26PM

https://www.boards.ie/discussion/2058431500/solis-inverter-unable-to-update-charge-discharge-to-100a

Charge and discharge aren't set there, they are set in the charge/discharge windows.

Snap shot from Soliscloud

Home Assistant

Not sure what the ones are in your first shot, I don't recall ever making changes there other than enabling/disabling the backup port.

Look under your work mode (I use Feed in Priority) you may be selfuse, but Charge/Discharge settings are same.

Even when set on 100A though most Solis derate to 90A or less hence I leave at 95A which one of the Boardies suggested.

Stefs_42 · 22-01-2026 11:54PM

https://www.boards.ie/discussion/comment/124171736#Comment_124171736

Im not too sure anymore that its BMS either. Tried disconnecting comms port from inverter that speaks with my dyness. Updated to user defined battery. Charge and discharge then dropped to zero. After upping it up to 100A and saving, it reverted back to zero. Am I missing a step in setup or something? As per Garys tutorial, I only missed to change boud rate but would that have anything to do with charge/discharge?

Reconnected back comms from dyness, it defaulted back to 20/30A.

Any other ideas, lads?🙏

Stefs_42 · 22-01-2026 11:58PM

https://www.boards.ie/discussion/comment/124171826#Comment_124171826

Have you also solis inverter? How are you able to update charge/discharge so high?🫣

...Ghost... · 23-01-2026 12:16AM

https://www.boards.ie/discussion/comment/124171879#Comment_124171879

The baud rate has nothing to do with charging or discharging, it's a comms thing. You've already tried disconnecting the BMS from inverter, which was my next suggestion. Check your charge and discharge timers. I have a video for that too if not familiar. @mjatkey is correct to suggest checking the timers which also have charge and discharge ratings. Set them to 95A if you have timers set. It can be done via the cloud or at the inverter. My video covers directly at the inverter.

mjatkey · 23-01-2026 12:28AM

https://www.boards.ie/discussion/comment/124171887#Comment_124171887

Yeap have a couple of Solis, both have been swapped in last 12 months. The 5K is now working fine but the 6K is still waiting for replacement number 2.

You are setting the charge/discharge current in the time of use window? Or are you talking about the rate the inverter uses in its day to day workings, these are not something you would set?

Firmware is 4A004C-050000, get Solis to up/down grade to that and restart inverter.

SD_DRACULA · 23-01-2026 10:45AM

https://www.boards.ie/discussion/comment/124171935#Comment_124171935

Defo get Solis to upgrade the FW, I had a similar issue when I had one in the past, would set the rates to 100a and then the damn thing would set them back to 50a until they updated the FW

conor_mc · 23-01-2026 11:11AM

https://www.boards.ie/discussion/comment/124171131#Comment_124171131

I should add, thanks for these Gary - I found them really helpful when troubleshooting my own problem.

...Ghost... · 23-01-2026 01:12PM

https://www.boards.ie/discussion/comment/124172454#Comment_124172454

No problem

on_the_roots · 23-01-2026 02:57PM

It doesn't seem to be anything to do with a BMS. The inverter's charging settings belong to the inverter only, this is supposed to write your new settings regardless.

When it comes to the actual charging/discharging, that's a different story. If the BMS has a limit of say 30A, the inverter will respect that but it has nothing to do with the charging/discharging settings in the inverter (in which scenario would remain the same 100A).

OP clearly has an issue with the Solis firmware.

Paul Kiernan · 23-01-2026 03:05PM

My Sofar inverter won't charge "dumb" batteries without the battery temperature sensor being connected! Could that be the issue here? Maybe it's a setting on the inverter battery parameters?

Stefs_42 · 23-01-2026 04:49PM

Thanks a million for your responses guys🙏 been onto Solis tech support, asked them to up firmware. Trully hooe this helps🙏

Now as for dyness battery that s attached to the system as per spec sheet its recommended charge/discharge rate should be set to 50A. Should I stick to this rule or can bypass that and double the output/input?

ECO_Mental · 23-01-2026 04:59PM

I have a Dyness powerbox and the battery BMS should tell the inverter what to charge and discharge at.. See here...I have three in parallel so that's the combined limit, so divide by three to get the individual limit. When at 100% Soc I'm sure the max discharge is 200Amps and charge is 100Amp

Screenshot_20260123_155532.jpg

SD_DRACULA · 23-01-2026 05:07PM

https://www.boards.ie/discussion/comment/124173574#Comment_124173574

Need to check the spec of the battery I had the 5kwh dyness and they were max 50a charge/discharge but didn't matter when you have 4 of them, current adds up. Newer ones should go to 100a I think.

Stefs_42 · 24-01-2026 09:59AM

https://www.boards.ie/discussion/comment/124171935#Comment_124171935

They said that firmware been pushed on, currently on 4C004F. And im still having issues saving settings. Would i just ask them if they can same FM as yours?

Stefs_42 · 24-01-2026 10:04AM

My ones are 50A aswell. But settings on my inverter are set: charge 20A, discharge 30A. I should be able to change them at least to 50! Inverter supports up to 100, but wont let me save these settings🫣

SD_DRACULA · 24-01-2026 10:18AM

https://www.boards.ie/discussion/comment/124175176#Comment_124175176

Try to get them to push the settings remotely or remove the comms cables of the battery and then save them. Last thing to try as well is to update the FW on the battery, had to do it once myself.

graememk · 24-01-2026 10:41AM

What BMS are you using on the other battery?

Do you have the lead acid battery setting in your options.

It's the BMS that is setting the low current.

When in user defined. Did you try charging from the grid at a higher current?

The BMS could still be overriding the current setting or it could just be showing you what the BMS is reporting.

The 20/30 is coming from the battery. And the inverter is doing what it is told

Stefs_42 · 24-01-2026 11:31AM

https://www.boards.ie/discussion/comment/124175235#Comment_124175235

When i switch to user defined, charge/discharge drops to 000/000. I can change the values to 100, but inverter wont save them. Same like when batteries are connected. Would that not indicate its actually inverter problem? Will get in touch with solis on Monday again🤞

graememk · 24-01-2026 12:40PM

https://www.boards.ie/discussion/comment/124175328#Comment_124175328

User defined, - still needs CAN communication. - it must still take the max current with the battery BMS.

Lead acid doesn't need any communication if that option is there.

mjatkey · 24-01-2026 02:51PM

https://www.boards.ie/discussion/comment/124175176#Comment_124175176

So is it these below TOU settings you are changing? Set a time window of say 5mins discharge at 100a and then do same with a discharge window.

Then check on the battery current in the inverter settings (under battery) and you should see charge and discharge traces.

Stefs_42 · 24-01-2026 06:40PM

Will try this next🙏 what impact will it leave on my battery setup thou? Only way to monitor charge/discharge would be through electricity provider smart meter hourly readings, correct? As solis app then would become useless🫣

Stefs_42 · 24-01-2026 06:50PM

You mean set charge/discharge for set period of time under 100A condition?

Tried that. Set it to 3 hour charge on night rate. Was able to pull in 6kw as per solis app. Theoretically it should be 15kw. But I think main control parameters where its set to 20/30 bypassing all else. I might be wrong.

Could there be higher level admin pass for solis inverter rarher than regular 0010 pass?

Alan McG · 24-01-2026 09:19PM

I've accidentally reset all my parameters in my Seplos BMS software. By any chance can anyone send me a copy of their CSV… I'm absolutely desparate!
Battery is a Mason 314 16kWh with 314Ah CATL cells and uses BMS 3.0

Solis inverter unable to update charge/discharge to 100A

Comments