Victron Energy Support — MultiPlus, VE.Bus & Off-Grid Fault Diagnosis
- Off-grid & hybrid specialists
- VE.Bus, MPPT & GX diagnostics
- Independent from Victron Energy
MultiPlus faults, MPPT errors, VE.Bus communication failures, and Cerbo GX monitoring issues — most are resolved remotely once the root cause is identified.
Book your free remote diagnosticSee the Solar Health PlanSafety: If your Victron system is making unusual noises, showing persistent alarms, or running hot, isolate at the AC and DC switches before investigating.
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!
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!
Common Victron problems we diagnose
Victron systems use VE.Bus networking, dedicated MPPT controllers, and GX monitoring — a fundamentally different architecture from grid-tied brands. These are the fault categories we handle most.
The #1 Victron support question. Multiple root causes: incorrect charge parameters, BMS lockout from a third-party battery, AC input current limit set too low, VE.Bus firmware mismatch, or DVCC configuration errors preventing the inverter-charger from entering bulk or absorption charge.
See diagnostic guide →Load exceeds the MultiPlus or Quattro continuous rating. Common in off-grid systems with electric showers, kettles, or immersion heaters. Includes load shedding strategies, PowerAssist configuration, and correct sizing guidance for off-grid installations.
See diagnostic guide →BMV or SmartShunt SoC trigger not starting the generator, relay wiring issues, or the MultiPlus rejecting generator power due to frequency or voltage tolerance settings. Growing demand as more UK properties run fully off-grid with backup generators.
See diagnostic guide →VE.Bus communication failures are the second most common Victron fault. Usually caused by self-crimped RJ-45 cables, daisy-chain topology issues in multi-unit setups, or phase master loss in parallel and three-phase configurations. Covers errors 3, 4, 5, 11, 14, and 17.
See diagnostic guide →Cerbo GX losing internet connectivity is a persistent complaint. WiFi dropout, Ethernet DHCP failure, static IP misconfiguration, and VRM access token expiry are the main causes. Affects the ability to monitor and control the system remotely via the VRM portal.
See diagnostic guide →Error 33 (PV overvoltage) and Error 38 (PV input shutdown) are the most searched Victron MPPT faults. SmartSolar 150/45 and 250/100 most affected. Usually caused by panel string voltage exceeding the controller's maximum Voc — particularly in cold weather when panel voltage rises.
See diagnostic guide →Third-party lithium BMS cutting power is common in Victron systems using Pylontech, BYD, or Dyness batteries. Low-temperature charge protection, cell imbalance, SoC calibration drift, and incorrect DVCC settings are the main triggers for unexpected BMS disconnects.
See diagnostic guide →Bluetooth pairing with VictronConnect, firmware updates, VRM portal registration, Cerbo GX network configuration, and remote console access. Covers the complete monitoring setup from physical connection to live VRM dashboard.
See setup guide →Initial VEConfigure setup, ESS assistant installation, UK grid code selection (G98/G99), charge current limits, battery monitor configuration, and AC input current limit. Covers the full commissioning sequence for grid-connected MultiPlus-II systems.
See setup guide →What we do for Victron system owners
Remote Victron System Diagnostic
We access your VRM portal data, review alarm logs, check VE.Bus and VE.Direct communication status, and analyse MPPT performance data to identify the root cause of any fault.
Off-Grid System Recovery
Off-grid Victron systems need fast resolution — there is no grid to fall back on. We prioritise off-grid callouts and provide remote VEConfigure changes to restore power while investigating the underlying fault.
On-Site Victron Inspection
Physical inspection of VE.Bus cabling, RJ-45 connectors, MPPT PV string connections, battery bank wiring, and GX device networking. Full system health check and written report.
Victron datasheets, manuals & warranty PDFs
Download datasheets, installation manuals and warranty documents for Victron MultiPlus inverters and battery systems. Self-hosted and always current.
Victron fault code index
Seeing an error code on your Victron system? Our fault code index explains what each code means, common causes, and safe next steps.
About Victron Energy systems — what makes them different
Victron Energy is a Dutch manufacturer that dominates the UK off-grid and hybrid solar market. Unlike grid-tied inverter brands that combine everything into a single box, Victron uses a component-based architecture: separate inverter-chargers (MultiPlus, MultiPlus-II, Quattro), dedicated MPPT solar charge controllers (SmartSolar, BlueSolar), and a central monitoring hub (Cerbo GX or Venus GX) running Venus OS. These components connect via VE.Bus (for inverter-chargers), VE.Direct (for MPPT controllers and battery monitors), and VE.Can (for compatible batteries and BMS units).
This modularity gives Victron systems enormous flexibility — supporting parallel operation, three-phase configurations, multiple MPPT strings, and a wide range of third-party batteries. The trade-off is complexity. The most common queries we handle: MultiPlus not charging, VE.Bus error codes, MPPT PV overvoltage, Cerbo GX offline, battery BMS disconnect, and generator auto-start failures. Victron's own VRM portal provides excellent data when it's connected — our job is diagnosing faults when it isn't, or when the data reveals a configuration problem. STS provides independent support — not affiliated with Victron Energy.
STS supports all major inverter and battery brands. If your Victron system is paired with a third-party battery, visit that brand's page for battery-specific guidance.
Browse all supported brandsVictron Energy questions answered
Ready to fix your Victron system?
Tell us your Victron hardware (MultiPlus model, MPPT controller, GX device), the battery brand, and what faults you're seeing. We'll review the VRM data and provide a clear diagnosis.
- Not affiliated with Victron Energy
- Free remote diagnostic · no fix, no fee
- Off-grid emergency priority available
Got a solar fault or need a quick answer? Drop us a message — we usually reply within a few minutes. Mon–Fri, 9am–7pm.