Solis inverter settings

Hi. Looking for some help with a new battery I recently installed with my 5kW Solis Hybrid. I installed a 15kWh Gobel Power PC200 and confirmed the User Define battery settings below with Gobel themselves. I’m on the Pinergy EV plan and would like to charge the battery as much as possible over the three-hour night rate period. I have the charge rate set at 100A but I understand the Solis Hybrids have a derating issue whereby the charge current is reduced after a certain amount of time. I believe I am seeing this issue but I am seeing much lower charge rates than I thought I would. See the graph below. By the end of the charging session, I am seeing a rate of only 45A at a SOC of 73% with an average of 11kWh being sent to the battery each night. Additionally, I installed a fan on the inverter to keep the internal operating temperatures in check. The max temperature I’m seeing with the fan operating is 54C. I should note that the battery has no issue charging to 100% from PV during the day and I am only seeing these issues when charging at night.

Are there any changes I can make to improve the charge current over the charging window?

Thanks for the quick response. Re the charge voltage, I specifically asked Gobel to confirm the floating and absorption voltage last week and the 55.2V values are what they quoted for the battery. I responded to them with the same graph as I sent above but they haven't responded yet. I'll try the higher voltage tonight and see how it fares out. Thanks.

When you say nearly full, what SOC are you talking about? Most mornings, I’m seeing a SOC of about 70-75% after charging from 10%. And as you can see from the graph, the charge rate starts to drop from 50% SOC so not nearly full.

Last time I got to 100% was on 24/10, the last time we got some proper sunshine. The same drop in charge rate was seen the following morning.

Hi,

Looking for some help with Solis inverter.

It's set to self use now. I'd like to change it to Feed in priority which I believe would stop it charging the batteries during the day and export more. We have enough capacity from the battery charging during 2 - 6am.

If I enable feed in priority mode will it automatically disable the self use and charge from Grid option?

There also doesn't appear to be a charge/discharge option under the feed in priority option either. Unless it appears when enabled?

Thanks.

Great. Thanks. Change made. Still charging the batteries but maybe takes a while to apply.

Give these settings a go with the pylon battery profile on the inverter. Set the battery overvoltage higher (60V) on the inverter than the BMS total overvoltage protection and disable the BMS total overvoltage protection switch. You may also need a firmware upgrade on your inverter also.

The latest firmware has updated charging/discharging features allowing the current and SOC settings per charge/discharge session to be set. This is a big improvement however I noticed what I consider to be a shortcoming.

The current logic is: If session SOC is reached then stop charging/discharging but keep the session open until the session end time is reached.

Better logic would be: If session SOC or session end time is reached then stop charging/discharging and close the session.

Scenario: Let's say battery min SOC is 20%, discharge session SOC is 25% and session end is 2200 but 25% SOC is reached at 2100. Any demand between 2100-2200 is fed from the grid not the battery even though there is 5% left to use on the battery (because 25% SOC limit is reached & the discharge window remains open).

I have made a request to Solis to change the logic as above and they replied to say it would be considered if there were more requests for it - so if anyone would like to see this very promising feature improved please send an email to euservice@solisinverters.com.

I'm not at home at the minute to check everything but I did just ask Solis for the latest one. I have the Solis S5-EH1P5K-L, model 3104 and now have inverter version 4B004F-800000.

Yes, just log a ticket by sending a request to euservice@solisinverters.com.

Does anybody know was there an update with solis inverters?, previously up to few days ago my app stopped at sunset telling me house load but now i can see load 24hrs a day.

I have a solis hybrid inverter 5kw and a seplos bms 15kw battery from fogstar and all working well, no solar yet, just load shifting and running house all day from the EV rate which is great but the inverter seems to have a high background consumption.

I thought my minimum power consumption seemed high so I tested by switching all curcuits off one by one until all off and looking at the seplos display could see approx 150w going into the inverter, and all switches off could only being used by the solis.

That is way too much right? Best info I can find says should be some idle consumption but would be expected to be maybe 50w or less?

Any ideas?

I think you must be right, thanks. It is hard to discover this, cannot even see any figure for this consumption in the manual. Kinda makes a mockery of the 97% efficiency claimed! I guess this probably affects most at low usage and becomes less relatively when more power is being pulled out.

I am only using battery at the moment so that 100 to 150 watts adds up to a significant daily share of the battery just to operate.. not a huge problem as so far I am only using at the EV rate. Just effectively reduces my working battery capacity and my calculations for energy cost savings.