Sigenergy Fault Code Index
Every Sigenergy SigenStor alarm code — from grid protection trips and battery faults to communication errors and AFCI arc detection. Each four-digit code explained with the most likely cause and what to do next. Covers the full 1000 to 5000 series from the official alarm list.
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Sigenergy Fault Code Index
- Free remote diagnostic — results same day · no fix, no fee
- Codes visible in mySigen app & SigenCloud
- SigenStor EC 5 · 8 · 10 · 12 kW systems
If your SigenStor is showing a persistent fault code in the mySigen app or has stopped exporting, a remote diagnostic identifies the cause from alarm logs and operating data — usually within 30 minutes.
Book free Sigenergy diagnosisHow diagnostics workI have a GivEnergy system consisting of two batteries, two inverters and a controlling EMS (Energy Management System) which has not worked since Nov 2025. After six months I discovered Solar Tech Support, reached out to them and Ron phoned me back – how often do you get that service? Could not be more helpful – worked directly with me over the phone, outside what I would call normal working hours. Lucid explanations and we were able to discuss the issues and history using camera and email history. As this was a very rare setup, Ron was able to access an EMS expert in the field to confirm the solution. One sunny day in, I am now only paying for standing charge and a few pence for spikes in grid consumption while battery catches up with house demand.
When my GivEnergy system had an issue, I was completely left without support and had honestly lost all hope. Thankfully, I searched online and found Ron, which completely turned things around. After sending him a message, he responded incredibly fast and called me to assure me that he would get the problem fixed. I really admire his dedicated, supportive nature and his determination to find a solution. With this kind of outstanding attitude and customer service, he has absolutely secured a future customer in me.
Ron want out of is way to help, nothing was to much. He was very thorough in what he did Very knowledgeable I would highly recommend Ron and his company He did a fantastic job for me. if you have any problems, he'll do his best to help you out and resolve your problem. I wouldn't hesitate to recommend them
Ron took me through a diagnostic to confirm my GivEnergy Inverter had a fault. A common one as it turns out with the AC Inverter. As GivEnergy is defunct there is no immediate fix, aside from sourcing 2nd hand replacement. It may be that a fix becomes available over the summer which would make a lot of GivEnergy customers happy (Again)
Contacted Ron with a problem and he sorted it out quickly with no problems at all. Very knowledgeable on anything solar/ batteries. I would recommend him to anyone
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
Contacted Solar Tech Support in desperation. After explaining the issues I had with my system a diagnosis was made and a solution proposed. Fantastic service, even contacted a manufacturer to arrange replacement parts for me. Great communications, explained all they were doing and what I had to do, clearly and precisly. Followed up to confirm all was ok. Excellent service.
After GivEnergy went into liquidation, just my luck, my battery started playing up (internal board crashed). Contacted my installer - not interested! Found Solar tech support on a Google search. Sooo glad I found this company! Ron is extremely helpful and has plenty of experience. He soon confirmed what the fault was, and helped me to get my system up and running again. Now moved my GivEnergy account to Solar tech support, and will definitely use again if I have more issues. Unusual to find such a helpful company in these times, no morons reading scripts, just direct contact with the engineer.
Contacted Solar Tech Support when trying to understand what my Givenergy inverter problem might be and what might be my options. Received good/honest advise which backed up my thoughts.
Ron is a super star. Two months ago my GivEnergy battery failed a firmware upgrade leaving it a brick. My installer couldn't/wouldn't fix it. GivEnergy couldn't/wouldn't fix it. Then they went into administration and all hope was lost. A flurry of emails later and Ron had diagnosed the fault (failed USB flash drive, something I'd suspected) and talked me through resolving it. Two months of nothing resolved in about 3 hours. It's great to work with someone who pays attention to the details, knows that they're doing (not just following a script) and gets stuff sorted without a fuss or up-charging.
I can add to the list of customers who had already 'given up' on GivEnergy due to their appalling customer service, and that was before they went into administration (their Trustpilot reviews don't lie!). So you can imagine my desperation when, having changed my ISP and my Inverter, predictably, proving to be the only device that didn't connect automatically to my new network, I found zero prospect of any customer support with GivEnergy having called in the administrators just five days earlier! The salvation came from Solar Tech Support. My IT advisor stumbled across their web site and some very helpful tips for beleaguered GivEnergy customers, as well as an offer to provide direct assistance. Nothing ventured, I decided to drop them an E-Mail, with very low expectations based on my experience of GivEnergy customer support. Within an hour Ron had responded with some pin point advice, and after a few exchanges of E-Mails he had nailed the problem, enabling the combined efforts of my IT advisor and solar installer to resolve it and reconnect my Inverter. Thank you Solar Tech Support, and Ron in particular, for coming to the aid of a deserted and despondent GivEnergy customer. Expert, razor sharp advice and first class customer service, even though I wasn't officially a customer.
This company are a rare gem, I had a very unusual problem following a failed firmware upgrade on my GivEnergy kit. I then found out GivEnergy were in administration and had dismissed all their support staff! None of the usual fixes to try and restore my inverter comms would work, and I looked everywhere, forums, GivEnergy youtube support videos - even AI couldn't figure it out. My installer was talking about huge sums for system replacements, and being vague / evasive about if they'd even install replacement GivEnergy inverter. Enter Solar Tech Support, reassuring and knowledgeable from the very start, I've learnt loads about my solar system though the friendly chat while my engineer worked as he diagnosed the problem and figured out a fix procedure that I've not found anywhere else - amazing . If you need solar system repairs - especially if you like me have been left high and dry by GivEnergy, I cannot recommend this company enough. Give them a call.
I sent a message on their website regarding a problem I have on my Givenergy system. Although not supplied by Ronald, I thought it was worth an email. Within the hour on a Saturday, he phoned and we discussed the problem. He logged in remotely and gave excellent advice. I'm too far away for his on-site help but he did diagnose the problem and was happy also to chat through my thoughts about an upcoming solar/battery install I'm planning. Great bloke.... if only he was nearer!
I have a GivEnergy system consisting of two batteries, two inverters and a controlling EMS (Energy Management System) which has not worked since Nov 2025. After six months I discovered Solar Tech Support, reached out to them and Ron phoned me back – how often do you get that service? Could not be more helpful – worked directly with me over the phone, outside what I would call normal working hours. Lucid explanations and we were able to discuss the issues and history using camera and email history. As this was a very rare setup, Ron was able to access an EMS expert in the field to confirm the solution. One sunny day in, I am now only paying for standing charge and a few pence for spikes in grid consumption while battery catches up with house demand.
When my GivEnergy system had an issue, I was completely left without support and had honestly lost all hope. Thankfully, I searched online and found Ron, which completely turned things around. After sending him a message, he responded incredibly fast and called me to assure me that he would get the problem fixed. I really admire his dedicated, supportive nature and his determination to find a solution. With this kind of outstanding attitude and customer service, he has absolutely secured a future customer in me.
Ron want out of is way to help, nothing was to much. He was very thorough in what he did Very knowledgeable I would highly recommend Ron and his company He did a fantastic job for me. if you have any problems, he'll do his best to help you out and resolve your problem. I wouldn't hesitate to recommend them
Ron took me through a diagnostic to confirm my GivEnergy Inverter had a fault. A common one as it turns out with the AC Inverter. As GivEnergy is defunct there is no immediate fix, aside from sourcing 2nd hand replacement. It may be that a fix becomes available over the summer which would make a lot of GivEnergy customers happy (Again)
Contacted Ron with a problem and he sorted it out quickly with no problems at all. Very knowledgeable on anything solar/ batteries. I would recommend him to anyone
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
Contacted Solar Tech Support in desperation. After explaining the issues I had with my system a diagnosis was made and a solution proposed. Fantastic service, even contacted a manufacturer to arrange replacement parts for me. Great communications, explained all they were doing and what I had to do, clearly and precisly. Followed up to confirm all was ok. Excellent service.
After GivEnergy went into liquidation, just my luck, my battery started playing up (internal board crashed). Contacted my installer - not interested! Found Solar tech support on a Google search. Sooo glad I found this company! Ron is extremely helpful and has plenty of experience. He soon confirmed what the fault was, and helped me to get my system up and running again. Now moved my GivEnergy account to Solar tech support, and will definitely use again if I have more issues. Unusual to find such a helpful company in these times, no morons reading scripts, just direct contact with the engineer.
Contacted Solar Tech Support when trying to understand what my Givenergy inverter problem might be and what might be my options. Received good/honest advise which backed up my thoughts.
Ron is a super star. Two months ago my GivEnergy battery failed a firmware upgrade leaving it a brick. My installer couldn't/wouldn't fix it. GivEnergy couldn't/wouldn't fix it. Then they went into administration and all hope was lost. A flurry of emails later and Ron had diagnosed the fault (failed USB flash drive, something I'd suspected) and talked me through resolving it. Two months of nothing resolved in about 3 hours. It's great to work with someone who pays attention to the details, knows that they're doing (not just following a script) and gets stuff sorted without a fuss or up-charging.
I can add to the list of customers who had already 'given up' on GivEnergy due to their appalling customer service, and that was before they went into administration (their Trustpilot reviews don't lie!). So you can imagine my desperation when, having changed my ISP and my Inverter, predictably, proving to be the only device that didn't connect automatically to my new network, I found zero prospect of any customer support with GivEnergy having called in the administrators just five days earlier! The salvation came from Solar Tech Support. My IT advisor stumbled across their web site and some very helpful tips for beleaguered GivEnergy customers, as well as an offer to provide direct assistance. Nothing ventured, I decided to drop them an E-Mail, with very low expectations based on my experience of GivEnergy customer support. Within an hour Ron had responded with some pin point advice, and after a few exchanges of E-Mails he had nailed the problem, enabling the combined efforts of my IT advisor and solar installer to resolve it and reconnect my Inverter. Thank you Solar Tech Support, and Ron in particular, for coming to the aid of a deserted and despondent GivEnergy customer. Expert, razor sharp advice and first class customer service, even though I wasn't officially a customer.
This company are a rare gem, I had a very unusual problem following a failed firmware upgrade on my GivEnergy kit. I then found out GivEnergy were in administration and had dismissed all their support staff! None of the usual fixes to try and restore my inverter comms would work, and I looked everywhere, forums, GivEnergy youtube support videos - even AI couldn't figure it out. My installer was talking about huge sums for system replacements, and being vague / evasive about if they'd even install replacement GivEnergy inverter. Enter Solar Tech Support, reassuring and knowledgeable from the very start, I've learnt loads about my solar system though the friendly chat while my engineer worked as he diagnosed the problem and figured out a fix procedure that I've not found anywhere else - amazing . If you need solar system repairs - especially if you like me have been left high and dry by GivEnergy, I cannot recommend this company enough. Give them a call.
I sent a message on their website regarding a problem I have on my Givenergy system. Although not supplied by Ronald, I thought it was worth an email. Within the hour on a Saturday, he phoned and we discussed the problem. He logged in remotely and gave excellent advice. I'm too far away for his on-site help but he did diagnose the problem and was happy also to chat through my thoughts about an upcoming solar/battery install I'm planning. Great bloke.... if only he was nearer!
Grid protection faults are the most commonly reported Sigenergy alarms in UK installations. The SigenStor monitors voltage, frequency, and phase balance continuously and disconnects when parameters exceed G99/G98 thresholds.
1010 — Grid power outage
Inverter · grid power
1011 — Grid overvoltage (Level I / II / III)
Inverter · voltage protection
1012 — Grid undervoltage (Level I / II / III)
Inverter · voltage protection
1013 / 1014 — Grid frequency fault
Inverter · frequency protection
1015 — Grid voltage imbalance
Inverter · three-phase
1023 / 1024 / 1025 — AC wiring fault
Inverter · installation
1016 / 1017 — DC component / leak current
Inverter · protection
Solar string faults relate to the DC side — the PV panels and their connections to the inverter's MPPT inputs. Each code includes a sub-ID identifying the specific string number (ID1 = String 1, ID2 = String 2, etc.).
1002 — Low insulation resistance
Inverter · DC side
1006 — PV string input overvoltage
⚠ Inverter shutdown — DC voltage exceeded
1007 — PV string reverse polarity
Inverter · wiring error
1008 — PV string sinking current
Inverter · panel mismatch
1009 — AFCI fault (arc detection)
⚠ DC arc detected — safety shutdown
Battery faults use the 2000-series codes and relate to the SigenBatt energy storage modules. These cover temperature, voltage, insulation, and internal protection events on the battery side of the system.
2002 — Battery low insulation resistance
Battery · safety
2003 — Battery over-temperature
Battery · environment
2005 — Battery under-temperature
Battery · cold weather
2006 — Battery module overvoltage
⚠ Cells overcharged — charge stopped
2007 — Battery module undervoltage
⚠ Deep discharge — discharge stopped
2008 — Battery internal protection
Battery · BMS
Communication faults affect monitoring, metering, and inter-component data exchange. The SigenStor system relies on the gateway for cloud connectivity and on CAN bus for internal component communication.
1018-ID1 — 4G communication fault
Inverter · connectivity
1018-ID2 — CAN communication fault
Inverter · internal bus
1018-ID3 / 4001-ID2 — Meter communication fault
Metering · CT clamp
1018-ID4 / 4001-ID1 — Gateway communication fault
Gateway · cloud connectivity
2004-ID4 — Battery master/slave comm fault
Battery · multi-module
Internal hardware faults indicate a problem with the inverter's or battery's physical components — power modules, control boards, fans, and internal protection circuits. Most require a power cycle as the first step.
1001 / 2001 / 3001 — Software version mismatch
System · firmware
1003 — Inverter over-temperature
Inverter · thermal
1004 — Equipment fault (hardware)
⚠ Internal circuit fault — power cycle required
1005 — System grounding fault
Inverter · earthing
1019 — Internal protection (MPPT / BUS)
Inverter · transient
1026 — Soft start failure
Inverter · startup
Off-grid faults trigger when the SigenStor is operating in backup (EPS) mode during a power cut or in an off-grid installation. The 3000-series gateway codes also appear here for system-level wiring faults.
1021-ID1 — Off-grid overload
Backup · EPS
1021-ID2 — Off-grid short circuit
⚠ Immediate shutdown — check wiring
1021-ID3 — Off-grid output overvoltage
Backup · voltage
1022 — EPO protection (emergency stop)
Safety · manual
3008 — Grid phase loss
Gateway · three-phase
The Sigenergy alarm list contains over 100 individual codes across the 1000–5000 series. This page covers the faults most commonly seen in UK residential installations. If you have a code that isn't listed, share the four-digit alarm code and sub-ID from the mySigen app and we'll identify it.
Full diagnostic — voltage and frequency trips, UK grid code settings, and when to contact your DNO.
Battery over/undervoltage, insulation resistance, internal protection events, and SigenBatt warranty process.
Gateway connectivity, 4G dongle, meter communication, and getting SigenCloud back online.
Sigenergy fault code questions
SigenStor alarm you can't resolve?
Share the alarm code from the mySigen app, when it first appeared, and whether the system is still generating. We'll analyse the alarm history and operating data remotely and tell you whether it needs a settings change, firmware update, or site visit.
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