AlphaESS Error Code Reference
Every AlphaESS SMILE inverter error code and battery alarm — the numeric code, what triggered it, and whether you need an engineer or can resolve it yourself. Look up your code below or browse by system area.
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AlphaESS Error Code Reference
- Sourced from official AlphaESS SMILE5 maintenance manual
- Covers SMILE5, SMILE-S5, and SMILE-BAT series
- Includes inverter errors (100xxx) and system alarms (110xxx)
If your AlphaESS inverter is flashing red or showing a numeric error code and you're unsure what to do next, a remote diagnostic identifies the root cause from your Alpha Cloud data — typically within 30 minutes.
Book free AlphaESS 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!
Fault codes triggered by mains supply conditions — voltage deviations, frequency shifts, grid loss, and relay failures. The inverter disconnects from the grid automatically when these protections activate.
100010 — Grid_relay_fault
Inverter error — grid relay
110004 — dc_power_alarm
Alarm — grid overvoltage derating
110021 — Grid Loss Alarm
Alarm — no grid detected
110022 — Grid Volt Alarm
Alarm — grid voltage out of range
110023 — Grid Freq Alarm
Alarm — grid frequency out of range
110024 — 10min Grid Volt Alarm
Alarm — sustained voltage deviation
110027 — LN Reverse Alarm
⚠ Wiring fault — do not ignore
110059 — grid waveform abnormal alarm
Alarm — waveform distortion
Codes related to the DC input from solar panels — insulation resistance, string polarity, overvoltage from too many panels in series, and input detection failures.
100007 — Insulation_fault
Inverter error — insulation resistance
100012 — PV_Reverse
⚠ Polarity reversed — do not touch DC
110014 — Pv over voltage
Alarm — PV string voltage too high
110048 — No Pv Input Alarm
Alarm — no solar generation
110049 — Input Power Limit Alarm
Alarm — PV input power limited
Codes from the battery management system and the inverter's battery interface — covering overvoltage protection, undervoltage shutdown, communication loss, and overcurrent events during charging or discharging.
100025 — BAT_OVP
Inverter error — battery overvoltage
100026 — BAT_UVP
Inverter error — battery undervoltage
100027 — Battery_lose
Inverter error — battery not detected
100030 — BAT1_discharge_OCP
Inverter error — battery overcurrent
110005 — Battery stops running alarm
Alarm — battery shutdown
Internal inverter errors related to the DC bus, output stage, and power electronics. Many of these recover automatically from transient grid disturbances — persistent occurrences indicate a hardware fault requiring professional diagnosis.
100005 — BUS_OVP1
Inverter error — DC bus overvoltage
100038 — Output_DC_over_current
Inverter error — DC output overcurrent
100041 — Output_DC_over_voltage
Inverter error — DC output overvoltage
100046 — DC_Input_Disturbance
Inverter error — DC input disruption
100054 — Dc_bus_undervolt
Inverter error — DC bus undervoltage
100166 — inverter circuit abnormal
Inverter error — internal circuit fault
100167 — boost circuit abnormal
Inverter error — boost converter fault
110040 — Inv Volt Low Alarm
Alarm — inverter voltage low
Faults related to the backup (UPS) output — the secondary AC output that powers essential loads during a grid outage. Overload and overvoltage protection events on this circuit.
100042 — Output_short
Inverter error — output short circuit
100043 — Output_overload
Inverter error — backup overloaded
100052 — Backup_ovp
Inverter error — backup overvoltage
110050 — Output Power Limit Alarm
Alarm — output power limited
Ground fault detection, arc fault protection, insulation monitoring, overtemperature shutdown, and fan failure alarms. These codes indicate safety-critical conditions — some require the system to be isolated before any inspection.
100008 — GFCI_fault
⚠ Ground fault — isolate system
100058 — AFCI_check_protect
Inverter error — arc fault protection
110006 — over_temperature_alarm
Alarm — inverter overheating
110029 — GFCI Alarm
Alarm — ground fault warning
110030 — ISO Alarm
Alarm — insulation monitoring
110034 — Fan Abnormal Alarm
Alarm — cooling fan fault
Internal system errors related to firmware, memory, DSP communication, and the 12V auxiliary supply. These typically require AlphaESS support involvement for remote firmware updates or hardware diagnosis.
100060 — Dsp_selfcheck
Inverter error — DSP self-check failed
100122 — EEPROM R/W Failure
Inverter error — memory read/write
100123 — DSP communication failure
Inverter error — DCDC module comms
100145 — 12V auxiliary power Fault
Inverter error — 12V supply failed
100165 — data storage error
Inverter error — data storage
110036 — FLASH ID Alarm
Alarm — flash memory ID
110037 — ReadFlash Alarm
Alarm — flash memory read
110039 — Machine Type Alarm
Alarm — firmware model mismatch
AlphaESS may release new error codes with firmware updates, and different SMILE hardware generations can have additional codes not shown here. Share the exact numeric code from your LCD or Alpha Cloud alarm history and we'll identify it. AlphaESS also maintain support via cloud.alphaess.com.
AlphaESS fault code questions
AlphaESS error code you need diagnosed?
Share the numeric error code from your LCD or Alpha Cloud alarm log, describe what the system is doing, and when the fault first appeared. We'll identify the root cause and recommend whether it needs a remote fix or an on-site visit.
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