Great advice from Ronald at Solar Tech Support, got my inverter back on line and stable.
Mervyn Ethelston · Aug 2026 Google
Brand support · Sofar Solar
Sofar Solar Support — HYD Hybrid, ME3000SP Battery Faults & Tariff Configuration
Sofar battery not charging, ME3000SP not working, SolarMan offline, grid disconnection faults — we diagnose Sofar Solar hybrid and AC-coupled systems at the engineering level. Remote-first, but WiFi isn't remote work: if the datalogger needs reconnecting to your WiFi, we can set it up on site, from £195. Independent from Sofar Solar and your installer.
Free remote diagnostic £125 only if we fix it remotely
- Not affiliated with Sofar Solar
- HYD hybrid, ME3000SP & G3 series supported
- SolarMan & tariff configuration specialists
Sofar battery not charging overnight?
Most Sofar configuration issues are resolved remotely in a single session. Tell us your inverter model and what you're seeing.
Book your free remote diagnosticSafety: If your Sofar inverter or battery shows error lights, isolate at the DC switch before investigating.
What an amazing service. They got my solar inverter back up and running after a firmware update went wrong. It is a breath of fresh air to deal with such a professional company.
Richard Street · Sep 2026 Google
An amazing experience and service from Ronald - totally 100% recommend. All remotely sorted with no need to wait around for someone to pop in and sort. I was a little nervous about doing this but was really easy and he talks you through the steps. Just such relief and we are back up and running again.
Emma Fletcher · Oct 2026 Trustpilot
Ron was Absolute God send . After 6 months of nightmares with the installer who messed up in every single aspect of the install... Ron came investigate and provide me with a detailed report and standing behind his words for my case His knowledge and understanding are simply exceptional. I can not express how happy I am to have the luck to deal with him
Boris Rusev · Oct 2026 Google
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
What an absolute star. Ron went well beyond what i would have hoped for. His attention to detail was incredible, even making good the work of others.
Miles Gladson · Sep 2026 Google
Sofar Faults
Common Sofar Solar problems we diagnose
Sofar Solar has a large UK install base across two distinct product generations — HYD hybrid inverters and the older ME3000SP AC-coupled units. We support both.
Battery & Charging
Most common
Battery not charging overnight
Sofar HYD hybrid inverters use SolarMan for schedule configuration. If the battery isn't charging on cheap rate, the TOU schedule likely has the charge window disabled, grid charge toggled off, or the SoC minimum already met. For ME3000SP units, the schedule is set locally on the device — a common source of confusion after router changes.
See diagnostic guide →ME3000SP
ME3000SP not working / EPS mode fault
The Sofar ME3000SP is an AC-coupled BESS managing battery charge/discharge alongside an existing solar system. Common issues: schedule set incorrectly after a power cycle, EPS mode not triggering during a grid outage, battery not communicating correctly over RS485, or the unit being stuck in a fault state requiring a configuration reset.
See diagnostic guide →BMS
Battery BMS communication fault
Sofar HYD hybrids communicate with their paired battery via CAN bus or RS485. A BMS comm fault stops the inverter from reading battery state, preventing charging and discharging. Common causes: wrong battery type selected on the inverter, loose CAN cable, or Pylontech/Dyness protocol mismatch if a third-party battery is paired.
See diagnostic guide →Common
Battery not discharging as expected
Battery fully charged but the Sofar inverter isn't drawing from it. Check the discharge schedule and minimum SoC threshold in SolarMan. A BMS protection trip will also prevent discharge — check the inverter event log for battery protection errors.
See diagnostic guide →Grid & Production
Common
No solar production
Sofar inverter powered but not generating. Check SolarMan for DC input voltage — if zero or very low, inspect DC isolators and PV string connections. DC isolation faults (G-ISO) and MPPT errors can suppress production while battery functions continue normally.
See diagnostic guide →Grid
Grid disconnection fault
Sofar inverters comply with G98/G99 and disconnect if grid voltage or frequency exceeds limits. The inverter reconnects automatically. In high-solar-density areas, repeated trips may require export limit configuration. The ME3000SP can also issue grid fault codes related to its AC coupling point.
See diagnostic guide →EPS
No backup during power cut
Sofar HYD hybrids support EPS mode, but it requires dedicated EPS wiring and must be enabled in settings. The ME3000SP also supports an EPS/off-grid mode but is frequently not commissioned for it. If backup power failed during an outage, EPS was likely never set up — or the load exceeded the EPS output rating.
See diagnostic guide →
Services
All services →
What we do for Sofar Solar owners
Remote Sofar Diagnostic
We review SolarMan data, TOU schedules, BMS logs, and error history for HYD hybrid inverters. We also review ME3000SP configuration logs and event history.
✓ SolarMan data review (HYD series)
✓ ME3000SP configuration audit
✓ Battery BMS fault isolation
Sofar Tariff Configuration
We configure TOU charge/discharge schedules for HYD hybrid inverters, or set the direct schedule on ME3000SP units, to correctly use Octopus Agile, Go, Intelligent, Flux, or any other tariff.
✓ TOU schedule build (SolarMan / direct)
✓ ME3000SP charge window setup
✓ Grid charge & SoC targets verified
On-Site Sofar Repair
EPS circuit verification, CAN bus checks, battery BMS pairing, DC fault location, and component replacement for Sofar HYD inverters and ME3000SP units.
✓ Evidence-led targeted checks
✓ Safety-focused report
✓ Repair or replacement path
Documents
Sofar datasheets, manuals & warranty PDFs
Download datasheets, installation manuals and warranty documents for Sofar 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
Sofar fault code index
Seeing an error code on your Sofar 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
·SolarMan monitoring & connectivity errors
About Sofar Solar systems — what you need to know
Sofar Solar is a Chinese manufacturer with a large UK installed base across two distinct product generations. The ME3000SP was one of the most widely installed AC-coupled battery energy storage systems in the UK between 2016 and 2021 — it retro-fits to existing solar systems to add battery storage and operates independently of the solar inverter. The newer HYD series (HYD 3600–6000 EP) are all-in-one hybrid inverters combining solar MPPT, battery management, and grid connection. Both use SolarMan for monitoring — the same platform used by Sunsynk and Hanchu systems.
The ME3000SP has a large installed base of older units now approaching the 7–10 year mark, and configuration faults or component wear are increasingly common on these systems. For newer HYD hybrid systems, the configuration issues are similar to other SolarMan-based hybrids. Common queries: Sofar ME3000SP not charging, Sofar HYD battery not charging overnight, Sofar SolarMan offline, ME3000SP EPS mode fault, and Sofar battery BMS comm fault. STS provides independent support — not affiliated with Sofar Solar.
HYD Hybrid Inverters
HYD 3600-EP — 3.6kW single-phase
HYD 4600-EP — 4.6kW single-phase
HYD 5000-EP — 5.0kW single-phase
HYD 6000-EP — 6.0kW single-phase
Monitoring: SolarMan / SolarmanPro
ME3000SP (AC-Coupled)
3kW AC-coupled BESS
Retro-fits to any solar system
RS485 battery communication
Widely installed 2016–2021
Battery Compatibility
Sofar BATT3000/5000 batteries
Pylontech PYLON protocol
Dyness & other LFP batteries
Grid: G98/G99 compliant
Related problem pages
We also support
STS supports all major inverter and battery brands. Sofar HYD inverters are often paired with Pylontech or Dyness batteries — visit those brand pages for battery-specific guidance.
Browse all supported brandsExplore
More Sofar help
Battery not charging
Solar battery not charging from solar or the grid? This covers every common cause. Free remote diagnostic — no fix, no fee. Same-day.
See battery not chargingSofar common problems & faults
Independent Sofar problems support across the UK — 2 faults STS engineers diagnose and repair. Free remote diagnostic, no fix no fee.
See Sofar common problems & faultsSolarMan offline
Solar monitoring portal showing offline? Tell a local WiFi fault from a dongle hardware failure, a firmware issue or a cloud-side outage, and fix it.
See SolarMan offlineDocuments & downloads
Download Sofar datasheets, installation manuals, warranty PDFs, app guides and wiring diagrams. HYD hybrid inverters and ME3000SP systems.
See documents & downloadsSofar Solar questions answered
For Sofar HYD hybrid inverters, the TOU schedule is configured in SolarMan. Check the charge window is enabled, grid charge is on, and the SoC minimum is below the current battery level. For ME3000SP units, the schedule is set directly on the device — not via an app — and can be inadvertently reset after a power cycle or firmware update.
The ME3000SP is an AC-coupled Battery Energy Storage System that manages charging and discharging alongside a separately installed solar inverter. It was one of the most common retrofitted battery systems in the UK from 2016–2021. Sofar no longer actively markets the ME3000SP, but units remain in widespread operation. We provide full diagnostic and configuration support for ME3000SP systems.
SolarMan offline means the Sofar inverter's WiFi datalogger has lost its connection, and in most cases only remote monitoring is affected. The system usually keeps running, but offline doesn't prove it, so check the inverter's own screen. This most commonly happens after a router change, ISP upgrade, or password update. If the datalogger won't rejoin your WiFi, we can set it up on site, from £195.
Yes. For HYD hybrid inverters we configure the TOU schedule in SolarMan. For ME3000SP units we configure the charge window directly on the device. Both approaches can be set up to capture Octopus Agile, Go, Intelligent, Flux, or any other time-of-use rate. Most configurations are completed remotely in a single session.
Book
Ready to fix your Sofar system?
Tell us your Sofar model and what you're seeing. We'll review the data and come back with a clear diagnosis — usually same day.
- Not affiliated with Sofar Solar
- No fix, no fee covers remote fixes. On-site work is quoted in writing before we start.
- On-site visits available across the UK
Service notice
We’re busier than ever. Thank you for your patience.
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.
Ronald Director, Solar Tech Support
On-site: Yorkshire only, for now
Remote: UK-wide, as usual
Remote fix: £125 if we fix it, no charge if we don’t
Replies: within 7 days
We use cookies to measure traffic and ads, sharing limited hashed data with Meta and Google. Decline keeps only essential cookies. Privacy policy
STS Solar Tech Support
Usually replies within minutes
Hi there!
Got a solar fault or need a quick answer? Drop us a message and we usually reply within a few minutes. Mon–Fri, 9am–7pm.
Start WhatsApp Chat
Got a solar fault or need a quick answer? Drop us a message and we usually reply within a few minutes. Mon–Fri, 9am–7pm.
End-to-end encrypted