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Brand support · AlphaESS

AlphaESS SMILE Support — Hybrid Inverter, Battery & AlphaCloud

SMILE hybrid inverters with SMILE B battery storage are spreading across UK installations. BMS communication alarms, EPS not activating, AlphaCloud portal offline, charge mode configuration — we diagnose AlphaESS systems at the engineering level. Remote-first. Evidence-led. Independent from AlphaESS and from your installer.
  • Not affiliated with AlphaESS Co. Ltd
  • All SMILE and SMILE B models
  • AlphaCloud portal diagnostics
Not sure where to start?

Most solar faults are diagnosed remotely in a single session. Tell us what you're seeing and we'll work it out.

Book your free remote diagnosticSee the Solar Health Plan

Safety: do not open inverter or battery enclosures. If you smell burning or see arcing, isolate at the consumer unit and call 999.

5.0
13 Trustpilot reviews
Trustpilot Google

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.

Ian · May 2026 Trustpilot

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.

Sree · May 2026 Trustpilot

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

Dennis Brown · May 2026 Trustpilot

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)

Tony Deacon · May 2026 Trustpilot

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

Phill · May 2026 Trustpilot

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

michael fairhurst · May 2026 Trustpilot

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.

Mr Machin · May 2026 Trustpilot

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.

Keith Ballard · Apr 2026 Trustpilot

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.

Hugh Speirs · Apr 2026 Trustpilot

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.

Christopher · Apr 2026 Trustpilot

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.

customer · Apr 2026 Trustpilot

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.

Andy Thomas · Apr 2026 Trustpilot

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!

Philip · Apr 2026 Trustpilot

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.

Ian · May 2026 Trustpilot

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.

Sree · May 2026 Trustpilot

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

Dennis Brown · May 2026 Trustpilot

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)

Tony Deacon · May 2026 Trustpilot

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

Phill · May 2026 Trustpilot

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

michael fairhurst · May 2026 Trustpilot

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.

Mr Machin · May 2026 Trustpilot

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.

Keith Ballard · Apr 2026 Trustpilot

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.

Hugh Speirs · Apr 2026 Trustpilot

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.

Christopher · Apr 2026 Trustpilot

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.

customer · Apr 2026 Trustpilot

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.

Andy Thomas · Apr 2026 Trustpilot

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!

Philip · Apr 2026 Trustpilot
AlphaESS Faults

Common AlphaESS problems we diagnose

Every fault below has a proven diagnostic path. Click through for the specific page or book a diagnostic if you're unsure.

EPS & Grid Protection
🔌
EPS not activating

Backup power not available during power cut. EPS disabled, wiring issue, or SoC below minimum threshold.

Guide →
Grid protection trip

SMILE disconnecting from grid due to G98/G99 fault. Voltage, frequency, or isolation error.

See diagnostic guide →
🔆
No solar production

SMILE not generating from panels. DC string fault, inverter protection trip, or grid code lock.

Guide →
📉
System underperforming

Output lower than expected. Panel soiling, string fault, or firmware misconfiguration.

See diagnostic guide →
Fault Codes

AlphaESS fault code index

AlphaCloud displays fault codes and alarms when system errors occur. Our diagnostic process covers all fault categories and alarm codes across SMILE and SMILE B models.

Fault code categories
·BMS cell and module alarms
·EPS mode fault events
·Grid protection alarms (G98/G99)
·Battery protection and isolation faults
Services

What we do for AlphaESS owners

Remote AlphaESS Diagnostic

We review AlphaCloud data, app settings, and error history to identify the exact fault without a site visit.

Fault path identified
Settings validation
Written engineer summary
Book remote diagnostic

SMILE System Recovery

AlphaCloud access lost, portal locked, or firmware misconfiguration. We recover monitoring and rebuild documentation.

Portal ownership recovery
WiFi module reconfiguration
Warranty evidence pack
Start recovery

On-Site AlphaESS Repair

BMS cable fault, battery module replacement, inverter repair, EPS wiring validation. Targeted visit — no guesswork on arrival.

Evidence-led targeted checks
Safety-focused report
Repair or replacement path
Discuss visit
Documents

AlphaESS datasheets, manuals & warranty PDFs

Download datasheets, installation manuals and warranty documents for AlphaESS hybrid inverters and battery systems. Self-hosted and always current.

📄Product datasheets & specifications
📘Installation & commissioning manuals
🛡Warranty terms & coverage documents
📱App & software setup guides
🔌Wiring diagrams
Fault Codes

AlphaESS fault code index

Seeing an error code on your AlphaESS inverter? Our fault code index explains what each code means, common causes, and safe next steps.

·Battery communication & BMS faults
·Grid connection & frequency faults
·Over-temperature & protection events
·AlphaCloud monitoring & connectivity errors

About AlphaESS SMILE systems

AlphaESS is a Chinese hybrid inverter and battery manufacturer with growing UK market share. The SMILE range covers single-phase and three-phase hybrid inverters; the SMILE B battery is modular and AC-coupled or DC-coupled depending on model. EPS (Emergency Power Supply) is a standard feature but requires correct configuration — the EPS output circuit must be wired separately from the main load circuit.

As a newer entrant to the UK market, firmware updates are common and can occasionally affect AlphaCloud portal connectivity and app performance. BMS communication alarms between SMILE B battery modules and the SMILE inverter are logged in AlphaCloud but require correct interpretation to diagnose whether the fault is transient or hardware-level.

If you're searching for AlphaESS battery not charging, AlphaESS BMS fault, AlphaCloud offline, AlphaESS EPS not working, or AlphaESS grid fault, STS provides independent diagnostic and repair support across the UK — not affiliated with AlphaESS Ltd or your installer. We diagnose at the engineering level using portal data, app screenshots, and on-site testing where needed.

Compare AlphaESS against other brands: AlphaESS vs GivEnergy, AlphaESS vs Fox ESS, AlphaESS vs Sigenergy, AlphaESS vs Pylontech.

We also support

STS supports all major inverter and battery brands — not just AlphaESS. If you have a mixed-brand system or are comparing options, visit the brand hub.

Browse all 19 brands
FAQ

AlphaESS questions answered

The most common causes are incorrect working mode settings in AlphaCloud or the AlphaESS app, a BMS communication alarm between the SMILE B battery and the SMILE inverter, or a grid fault preventing normal operation. Check the AlphaCloud event log for any active alarms. If a BMS communication alarm is present, a full power cycle (inverter AC off, battery off at isolator, wait 60 seconds, battery on first, then inverter) resolves most transient faults.
AlphaESS EPS requires two things: the backup load must be wired to the dedicated EPS output terminal (not the main load output), and EPS mode must be enabled in the SMILE inverter settings. If the battery SoC is below the EPS minimum threshold at the time of a power cut, EPS will not activate. Check AlphaCloud for the battery SoC at the time of the outage and confirm the EPS output wiring and settings are correct.
AlphaCloud loses data when the AlphaESS communication module (the 4G or WiFi data stick) loses its connection. Check the LED on the communication dongle — a solid LED means connected. Power cycling the inverter (AC isolator off, wait 30 seconds, back on) usually restores cloud connectivity. After a router change or WiFi password update, the dongle WiFi settings need to be reconfigured via the AlphaESS app.
Yes. AlphaESS BMS alarms between the SMILE B battery and SMILE inverter are logged in the AlphaCloud event history. We review the alarm sequence to determine whether the fault is a transient communication dropout (often resolved by power cycle), a firmware version mismatch between the battery and inverter, or a hardware fault in the BMS or CAN cable. Most BMS communication faults on AlphaESS systems are resolved without a site visit.
SMILE is the hybrid inverter unit that converts DC from solar and batteries into AC power for your home and the grid. SMILE B is the modular battery storage system that pairs with SMILE inverters. A complete AlphaESS system consists of one SMILE inverter paired with one or more SMILE B battery modules for scalable energy storage. Some older systems may use different battery models — we diagnose all variants.
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Ready to fix your AlphaESS system?

Tell us what's happening. We'll review your details and come back with a clear diagnosis path — usually same day.

  • Not affiliated with AlphaESS Co. Ltd
  • Free remote diagnostic · no fix, no fee
  • On-site visits available across Yorkshire

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