MultiPlus faults, MPPT errors, VE.Bus communication failures, and Cerbo GX monitoring issues — most are resolved remotely once the root cause is identified, but WiFi isn't remote work: if the Cerbo GX has dropped off your WiFi, follow our free VRM portal offline guide, and if it still won't reconnect, we can set it up on site, from £195.
Book your free remote diagnosticSafety: If your Victron system is making unusual noises, showing persistent alarms, or running hot, isolate at the AC and DC switches before investigating.
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
Absolutely wonderful. Would recommend without hesitation. I had an issue I was thinking would never be fixed and they fixed it. Help, advice and support every step of the way. I can't recommend highly enough. Thank you so much ⭐
Had a problem with my GivEnergy battery which seemed to be a calibration issue. My installer was unable to help so contacted Ron at Solar Tech Support who was immensely helpful. He diagnosed, confirmed and fixed the problem remotely and very speedily. Would thoroughly recommend this company for their knowledge and ability.
Solar Tech have been everything you expect and want from a support organisation. Easy to contact, quick to respond and their expertise and knowledge about GivEnergy Systems was amazing. All the work was done remotely, and they guided me through the recovery of a failed system, which ended up to be down to a physically damaged USB key installed in production that was corrupted and stopping one battery from working, locking the whole system. All fixed and the system is working again. Massive thanks to the team and their help. Will be my goto for any future issues with our GivEnergy system. The pictures shows the condition of the USB as installed..
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.
Wow!!! I have a Givenergy system. The battery stopped charging and depleted fully. Obviously Givenergy went into administration, so I was working with the reseller / installer to get it fixed. They told me they couldn't resolve it and the best they could do was offer me a replAcement at cost, so basically having to buy a new system. I happened to come across STS when searching for how to fix it myself. Ronald has been a god send, within 2 days all is working perfectly and set up correctly. When it comes to experts. He truly is the expert. If you have issues with your Givenergy system and don't know where to go for good help, give him call. 07944 877329. Thanks Ronald, regards Neil W
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. Error 33 is panel string voltage exceeding the controller's maximum Voc, particularly in cold weather. Error 38 is a battery over-voltage protection with a different cause.
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 →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 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.
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.
Download datasheets, installation manuals and warranty documents for Victron MultiPlus inverters and battery systems. Self-hosted and always current.
Seeing an error code on your Victron system? Our fault code index explains what each code means, common causes, and safe next steps.
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 brandsIndependent Victron problems support across the UK — 7 faults STS engineers diagnose and repair. Free remote diagnostic, no fix no fee.
See Victron common problems & faultsIndependent Victron setup support across the UK — 2 setup procedures STS engineers explain step by step. Free remote diagnostic, no fix no fee.
See Victron setup & how-to guidesIndependent solar PV and battery diagnostic, repair and recovery services across the UK. No-fix-no-fee remote diagnostic — same/next day.
See servicesTell 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.
Due to unprecedented demand we’re currently only carrying out on-site work in Yorkshire, and replies are taking up to 7 days. Remote diagnostics continue for the whole UK as normal.
Every message is read and answered, so please don’t send it twice; that only slows the queue.
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