very
Solis RHI 5kw + Pylontech US500 not stopping discharge at defined SOC
- Thread starter K-Tech
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SelfUse on --> min-SOC 20% Force-Charge 15%;
Backup on --> Backup-SOC 30%-->charge from grid allow;
EPM --> feed in 100w allow,
Backup output enable,
Battery pylonLV
Hello, I'm new in this forum. Fortunately I found this thread and help me a lot.
I have a SOLIS RHI-5K-48ES-5G inverter ( model 3105, firmware 3D0037) coupled with two pylontech 3000C bateries.
I detected two problems. First: the drain of battery when SOC is below 20%. Second: The battery gone to idle mode and I didn't able to active to normal functioning. No errors, no alarm, all status ok. ¿What was happening?
After read this thread I tried two tricks (and now my batteries are alive again).
Before this read, I tried to shutdown the batteries, the inversor .... No success, the batteries are idle. When I manage to charge batteries from grid they run OK, but when shut off the grid charge they again go to idle mode. (just a slow flashing green led in batteries but no charge status bar led).
So I do the following:
1) set the EPM on to feed 100w allow as Hiedi said. Then charged from grid the batteries from 17% to 22% SOC. After that, it still where idle.
2) Set the backup mode to ON just few minutes. The inverter begin to charge the batteries with 4000W from grid. Previously set the reserve SOC to 30%. But I not waited to reach 30%, actually I deactivate the backup mode two minutes after start on. When charging battery where showing the led SOC status bar (and I can ear airfans from inverter).
After stop the charge, all continue to run as they should, except that when SOC reached again 20% it began again a slow drain of 130w (actually are far less than this). Just a note: during few seconds it began to export about 90w to grid. The point 1) above perhaps avoided the inverter to get again idle.
When PV production where greater than house charge, the batteries charged again from PV. Good!!
The only thing not resolved is the drain when reached 20%, but at lest I've been able to resurrect the bateries.
I have a SOLIS RHI-5K-48ES-5G inverter ( model 3105, firmware 3D0037) coupled with two pylontech 3000C bateries.
I detected two problems. First: the drain of battery when SOC is below 20%. Second: The battery gone to idle mode and I didn't able to active to normal functioning. No errors, no alarm, all status ok. ¿What was happening?
After read this thread I tried two tricks (and now my batteries are alive again).
Before this read, I tried to shutdown the batteries, the inversor .... No success, the batteries are idle. When I manage to charge batteries from grid they run OK, but when shut off the grid charge they again go to idle mode. (just a slow flashing green led in batteries but no charge status bar led).
So I do the following:
1) set the EPM on to feed 100w allow as Hiedi said. Then charged from grid the batteries from 17% to 22% SOC. After that, it still where idle.
2) Set the backup mode to ON just few minutes. The inverter begin to charge the batteries with 4000W from grid. Previously set the reserve SOC to 30%. But I not waited to reach 30%, actually I deactivate the backup mode two minutes after start on. When charging battery where showing the led SOC status bar (and I can ear airfans from inverter).
After stop the charge, all continue to run as they should, except that when SOC reached again 20% it began again a slow drain of 130w (actually are far less than this). Just a note: during few seconds it began to export about 90w to grid. The point 1) above perhaps avoided the inverter to get again idle.
When PV production where greater than house charge, the batteries charged again from PV. Good!!
The only thing not resolved is the drain when reached 20%, but at lest I've been able to resurrect the bateries.
pm2000
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That’s the model I have and the firmware I had.
Ring Solis and ask the. To upgrade you to A10037 firmware like I got . You’ll get corrected drawn wattage figures , not much, but is fixed.
finalbillybong
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Interesting. I have the RHI-6K-48ES-5G and Solis told me that 3D0037. (which I have) is the most up-to-date version of the firmware. I might open a new ticket (that will hopefully be assigned to a different agent) and request A10037 once my replacement data logger has arrived.
I don't know which firmware is most recent. My SOLIS RHI-5K-48ES-5G (model 3105 and firmware 3D0037) when consuming battery below stablished 20% SOC, displays 128 W, while my measurements are just 100W lesser, i.e. 28W. The 28W are also according with the rate of percent wasted from my two pylontech 3000C ( 7 kwh capacity).
28W sounds spot on for the DC draw of the Solis itself from the batteries when there is no PV input - e.g. overnight.
pm2000
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I had your same problem when I had 3D0037 and after upped to A10037 the watts displayed were spot on, i.e. 19W, 24W or 29W tops.
finalbillybong
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How did you get Solis to apply version A10037? I've asked for that version and they keep telling me that 3D0037 is the most up-to-date version.
pm2000
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an agent over the phone did apply it remotely
Ring Solis UK, tell them that your inverter reads cuadruple the wats when feeding the inverter with DC and under the SoC.
If the product is meant to be on 15-20W standby why does it read almost 70W?
I have a dongle for my batteries and they were telling 19W discharge when the inverter was saying around 70W, after the update to A10037 the numbers matched.
Ring Solis UK, tell them that your inverter reads cuadruple the wats when feeding the inverter with DC and under the SoC.
If the product is meant to be on 15-20W standby why does it read almost 70W?
I have a dongle for my batteries and they were telling 19W discharge when the inverter was saying around 70W, after the update to A10037 the numbers matched.
After some weeks dealing with Solis Inverter RHI-5K-48ES-5G (model 3107, Firmware 3D0037) these are the points I've observed
which would help to understand and avoid some problems with the anomaly discharge of battery after low SOC limit has been reached.
The inverter is connected to grid and two batteries Pylontech 3000C giving about 7kwh of charge capacity, but it would be the same for other
battery model and capacity. Self use mode set.
First an important feature we need to have in mind: The inverter reaction to a sudden change in home load or in FV production is not instantaneous. It take some seconds to run properly as expected. In the meanwhile it try export or import energy to/from grid.
So if we limit the export to grid to 0W a fast change in load or production may drive the FV production to very low values (independently of how the SOC of batteries are). This situation can last some minutes. (I had almost 25 minutes with just 38W in a situation where 1600W were expected).
Advice: Never block the export to grid. Optimal limit to export is about the variation in home load or production we can have in two or three
seconds. Don't worry about exporting to grid if no desired, this situation will remain just few seconds, usually less than a minute.
Another effect limiting export to 0W is the inverter will never awake the IDLE batteries when they are below SOC. If early in the morning the FV production is over home load it should begin to charge the batteries, but because the delay effects I told before if it cannot export energy during few seconds the inverter cannot awake the batteries.
And now let's see why the battery is discharging after the programed low limit is reached. Actually it depends to the FV production when the limit is
reached:
- If reached with FV production available but still importing from grid because of high home load, then batteries are set to IDLE by inverter. They will be in that state (as it should be) till FV production again were over home load and then became to charge (remember, if we allow export to grid).
- If reached with FV production already 0 and discharging from batteries, then they will remain discharging at low rate to feed the inverter. In addition firmware 3D0037 will give wrong measures (Two or three times higher than real values). Users with 1A0037 firmware are reporting correct measures for energy borrowed from battery.
Please, Solis, fix that.
which would help to understand and avoid some problems with the anomaly discharge of battery after low SOC limit has been reached.
The inverter is connected to grid and two batteries Pylontech 3000C giving about 7kwh of charge capacity, but it would be the same for other
battery model and capacity. Self use mode set.
First an important feature we need to have in mind: The inverter reaction to a sudden change in home load or in FV production is not instantaneous. It take some seconds to run properly as expected. In the meanwhile it try export or import energy to/from grid.
So if we limit the export to grid to 0W a fast change in load or production may drive the FV production to very low values (independently of how the SOC of batteries are). This situation can last some minutes. (I had almost 25 minutes with just 38W in a situation where 1600W were expected).
Advice: Never block the export to grid. Optimal limit to export is about the variation in home load or production we can have in two or three
seconds. Don't worry about exporting to grid if no desired, this situation will remain just few seconds, usually less than a minute.
Another effect limiting export to 0W is the inverter will never awake the IDLE batteries when they are below SOC. If early in the morning the FV production is over home load it should begin to charge the batteries, but because the delay effects I told before if it cannot export energy during few seconds the inverter cannot awake the batteries.
And now let's see why the battery is discharging after the programed low limit is reached. Actually it depends to the FV production when the limit is
reached:
- If reached with FV production available but still importing from grid because of high home load, then batteries are set to IDLE by inverter. They will be in that state (as it should be) till FV production again were over home load and then became to charge (remember, if we allow export to grid).
- If reached with FV production already 0 and discharging from batteries, then they will remain discharging at low rate to feed the inverter. In addition firmware 3D0037 will give wrong measures (Two or three times higher than real values). Users with 1A0037 firmware are reporting correct measures for energy borrowed from battery.
Please, Solis, fix that.
I have export set to zero (RHI-3K-48ES-5G). As far as I can tell (from the live graphics of the LCD) the inverter ignores that for peak-lopping and smallish amounts go to the grid temporarily; The DNO grid meter also registers 'reverse operation' codes.
Solis never 'assigned' the ticket number issued for the problem of SOC value being ignored. The ticket number was then cleared from their system. I guess my next option is to submit a warranty claim.
BTW, the SOC thresholds are respected if the inverter is set to 'backup' mode (i.e. as the minimum set reserve for the battery), but not in 'self-use' and this in any case could allow the battery to drain very low during a power cut.
Solis never 'assigned' the ticket number issued for the problem of SOC value being ignored. The ticket number was then cleared from their system. I guess my next option is to submit a warranty claim.
BTW, the SOC thresholds are respected if the inverter is set to 'backup' mode (i.e. as the minimum set reserve for the battery), but not in 'self-use' and this in any case could allow the battery to drain very low during a power cut.
Bright_Sky
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Hi all,
I'm so glad to have found this thread as I too am experiencing battery drain with my Solis inverter.
Inverter: Solis Hybrid 3.6kW (S5-EH1P3.6K-L, Model 3102, Firmware 3D0037).
Battery: Pylontech US5000.
Configuration:
Battery SOH = 100%
Overdischarge SOC = 25%
Forcecharge SOC = 10%
Mode = Self Use
Time of Use Parameters: Charge Limit = 60A, Discharge Limit = 60A, Charge Time = 00:10 to 04:50. (No Discharge Time Set, all 00:00).
Charging from Grid = Allow.
AC backup = Disabled.
From 00:10 to 04:50 the battery charges from grid as expected. At 100%, charging from grid stops. Within this time period the battery does discharge ~100W so I've never seen the battery at 100% at the end of this time. It looks like normal houselhold usage. I do not have the discharge current set to 0A so may try this setting thereby ensuring the battery is not used during the configured time. What is slightly confusing here is that I have my water immersion on overnight and that doesn't pull from the battery.
From 04:50 to 00:10 the battery supplements household use as expected in conjunction with the solar PV panels. Not the best time of year for solar, but I have seen the panels charging the battery.
When the battery charge drops to its Overdischarge SOC (set at 25%), higher draw stops but a 100W continuous drain takes the SOC below 25%. This can be seen on the Solis Cloud app and the battery icon remains purple. I've not had it down to the Forcecharge value (set at 10%), but it does appear to continue <20%. The battery does not idle or go to sleep as I would expect.
However, by going into the inverter settings (Advanced Settings -> Storage Energy Set -> DSP Update) and pressing 'Ent', the inverter cycles and triggers/forces the battery to go to sleep. This is shown on the battery as the charge meter LEDs go out, and the power LED flashes. The Solis Cloud app then shows 0W draw on the battery and the icon is grey.
The next day everything repeats and battery drain is back again once it reaches 25% SOC.
I'm so glad to have found this thread as I too am experiencing battery drain with my Solis inverter.
Inverter: Solis Hybrid 3.6kW (S5-EH1P3.6K-L, Model 3102, Firmware 3D0037).
Battery: Pylontech US5000.
Configuration:
Battery SOH = 100%
Overdischarge SOC = 25%
Forcecharge SOC = 10%
Mode = Self Use
Time of Use Parameters: Charge Limit = 60A, Discharge Limit = 60A, Charge Time = 00:10 to 04:50. (No Discharge Time Set, all 00:00).
Charging from Grid = Allow.
AC backup = Disabled.
From 00:10 to 04:50 the battery charges from grid as expected. At 100%, charging from grid stops. Within this time period the battery does discharge ~100W so I've never seen the battery at 100% at the end of this time. It looks like normal houselhold usage. I do not have the discharge current set to 0A so may try this setting thereby ensuring the battery is not used during the configured time. What is slightly confusing here is that I have my water immersion on overnight and that doesn't pull from the battery.
From 04:50 to 00:10 the battery supplements household use as expected in conjunction with the solar PV panels. Not the best time of year for solar, but I have seen the panels charging the battery.
When the battery charge drops to its Overdischarge SOC (set at 25%), higher draw stops but a 100W continuous drain takes the SOC below 25%. This can be seen on the Solis Cloud app and the battery icon remains purple. I've not had it down to the Forcecharge value (set at 10%), but it does appear to continue <20%. The battery does not idle or go to sleep as I would expect.
However, by going into the inverter settings (Advanced Settings -> Storage Energy Set -> DSP Update) and pressing 'Ent', the inverter cycles and triggers/forces the battery to go to sleep. This is shown on the battery as the charge meter LEDs go out, and the power LED flashes. The Solis Cloud app then shows 0W draw on the battery and the icon is grey.
The next day everything repeats and battery drain is back again once it reaches 25% SOC.
Welcome! Whilst the battery is set to charge (00:10 to 04:50) the battery will not supply your immersion heater - you immersion will be supplied from grid too. After 04:50 the battery should supply the immersion if needed, but I guess the hot water tank is already hot by that time? ?
It would be expected that the battery will power the Solis, but that should be around 30W, not 100W. From this an other threads it sounds like an upgrade / downgrade / sideways grade to firmware A10037 should fix the power the Solis reports to the Chinese (aka solis cloud app).
My 15kWh of batteries will drain about 1% in 5 hours, powering the Solis, so I would expect a single US5000 to drain about 3% in 5 hours ?.
Bright_Sky
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Welcome! Whilst the battery is set to charge (00:10 to 04:50) the battery will not supply your immersion heater - you immersion will be supplied from grid too. After 04:50 the battery should supply the immersion if needed, but I guess the hot water tank is already hot by that time? ?
It would be expected that the battery will power the Solis, but that should be around 30W, not 100W. From this an other threads it sounds like an upgrade / downgrade / sideways grade to firmware A10037 should fix the power the Solis reports to the Chinese (aka solis cloud app).
My 15kWh of batteries will drain about 1% in 5 hours, powering the Solis, so I would expect a single US5000 to drain about 3% in 5 hours ?.
Hi SeaGal,
On the first point I would agree completely if asked yesterday before looking into this spurious battery drain vs SOC! When set to charge 00:10 to 04:50 I wouldn't expect any draw from the battery. But looking in more detail I noticed ~95W to100W getting pulled from around 3am, only increasing as the early morning goes on. This coincides with the battery being 100% charged at around 3am. So this too could be the battery powering the inverter?! See the screengrab below from the Solis Cloud showing total energy from the battery today.
Normally my immersion has finished heating the tank by 04:50. After that time, I've had to tweak the MyEnergi Eddi to not draw from the battery and only heat the the tank when there is enough PV generation. Bit of a work around in the MyEnergy settings when using a DC-coupled system.
On the second point, I'm coming to the conclusion that whilst the inverter may be operating as designed, it is not as expected.
Without battery, my inverter would shutdown at night without PV. So as I've read in prior posts, its definitely DC only. With the battery connected the inverter will remain live with just the battery.
What is unexpected is that when the 25% SOC limit is reached, the battery doesn't go into idle or whole inverter doesn't shutdown rather than trickle feeding below the limit. I can live with it if now that I understand it.
But the value is wrong (as others have seen). As I type, the battery is below 25% SOC and pulling 105W according to the Solis Cloud app and web portal. If this is meant to be 25-30W then its reading 4 x too high which needs to get fixed.
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Agree. I don't use the Solis Cloud app, but from what others have reported this anomaly is fixed with an upgrade to firmware A10037.
Bright_Sky
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Ive raised a ticket with Solis service but so far have been unsuccessful....
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