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Brand support · Pylontech Battery Storage

Pylontech Battery Support — US2000 / US3000 / US5000 BMS Faults & Inverter Pairing

Pylontech battery not charging, BMS communication fault, PYLON protocol pairing issues, or inverter compatibility problems — we diagnose Pylontech battery systems across all common inverter pairings. Independent battery specialists, not affiliated with Pylontech or your installer.
  • Not affiliated with Pylontech
  • US2000, US3000, US5000 & Force H2 supported
  • All compatible inverter pairings supported
Pylontech battery not working correctly?

Most Pylontech BMS and pairing issues are resolved remotely. Tell us the battery model, your inverter brand, and what you're seeing.

Book your free remote diagnosticSee the Solar Health Plan

Safety: If your Pylontech battery shows a red fault LED or unusual heat, isolate at the DC switch before investigating.

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
Pylontech Faults

Common Pylontech problems we diagnose

Pylontech is one of the most widely deployed battery brands in the UK — the faults we see are consistent and well-understood. Most are resolvable remotely.

Battery & Charging
🔋
Most common
Battery not charging overnight

Pylontech batteries don't hold their own schedule — charging is controlled by the paired inverter's TOU configuration. If the battery isn't charging overnight, start with the inverter's monitoring platform. Check that the charge window is enabled, grid charge is on, and the SoC minimum is below your current charge level.

See diagnostic guide →
📡
BMS
BMS communication fault (PYLON protocol)

The inverter has lost communication with the Pylontech BMS. Pylontech batteries use the widely-supported PYLON protocol over RS485 or CAN. Common causes: wrong protocol or baud rate selected on the inverter, damaged communication cable, or DIP switch addressing errors in a multi-module stack. Diagnosable remotely from inverter event logs.

See diagnostic guide →
⬇️
Common
Battery not discharging

Pylontech battery at 100% but the inverter isn't drawing from it. Check the inverter's discharge schedule and minimum SoC threshold. If a BMS protection trip is active (e.g. cell imbalance, over-temperature), the battery will hold off discharge until cleared. Check Pylontech LED status — flashing amber often indicates a cell balance issue.

See diagnostic guide →
🔌
Pairing
Inverter compatibility / pairing problem

Pylontech batteries work with open-protocol hybrid inverters (Solis, Sofar, Victron, Lux, SolaX) but not closed systems like GivEnergy or Fox ESS. The inverter must be set to use the correct battery type (Pylontech/PYLON, not generic lithium). A mismatch between expected and actual battery capacity — common when adding modules to an existing stack — can also cause pairing failures. We verify the full communication and capacity configuration.

See diagnostic guide →
Services

What we do for Pylontech battery owners

Remote Pylontech Diagnostic

We review inverter logs, PYLON protocol communication data, and battery BMS error history to find the fault — whether it's in the battery, the inverter, or the communication layer.

PYLON protocol communication audit
Battery module LED status interpretation
Inverter schedule & capacity configuration
Book remote diagnostic

Inverter Pairing & Configuration

We configure the correct PYLON protocol, baud rate, battery capacity, and module count on the paired inverter. Works with Solis, Sofar, Victron, LuxPowerTek, SolaX, and other open-protocol inverters.

PYLON protocol & baud rate matching
Battery count & capacity setting
TOU schedule optimisation
Book config session

On-Site Pylontech Inspection

RS485/CAN cable verification, DIP switch inspection, multi-module stack health check, and module replacement assessment. HV-qualified engineer available for Force H2 systems.

Physical connection & cable check
Safety-focused report
Repair or replacement path
Discuss visit
Documents

Pylontech datasheets, manuals & warranty PDFs

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

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

Pylontech fault code index

Seeing an error code from your Pylontech battery? Our fault code index explains what each code means, common causes, and safe next steps.

·Battery communication & BMS faults
·Cell imbalance & BMS protection events
·Over-temperature & thermal management
·CAN bus & connectivity errors

About Pylontech batteries — what you need to know

Pylontech is one of the world's largest LiFePO4 battery manufacturers and has one of the highest install bases of any battery brand in the UK residential solar market. Their most widely deployed products are the US series — low-voltage (48V) stackable modules: US2000C (2.4kWh), US3000C (3.5kWh), and US5000 (4.8kWh). These pair with most hybrid inverters via the PYLON RS485 or CAN protocol. For higher-capacity systems, the Force H2 provides a high-voltage architecture. US series batteries are typically rated IP20 for indoor installation with a 10-year warranty.

Pylontech batteries are inverter-agnostic by design, using the PYLON protocol that is supported by most major hybrid inverters. Common UK pairings include Solis, Sofar, Victron, LuxPowerTek, and SolaX inverters. GivEnergy and Fox ESS are closed battery systems and are not compatible with Pylontech. Because the schedule is held by the inverter, most charging problems are inverter configuration issues rather than battery faults. The most common queries: Pylontech US2000 not charging, Pylontech BMS communication fault, Pylontech US3000 LED status, US5000 pairing issue, and Pylontech not discharging. STS provides independent support — not affiliated with Pylontech.

US Series (LV 48V)
US2000C — 2.4kWh per module
US3000C — 3.5kWh per module
US5000 — 4.8kWh per module
10yr warranty · IP20 · stackable
Force H2 (HV)
High-voltage architecture
Multi-tower / multi-rack configs
Requires HV-capable inverter
HV-qualified engineer for site visits
Communication
PYLON protocol (widely supported)
RS485 or CAN bus
Indoor installation (IP20)
Works with Solis, Sofar, Victron, Lux, SolaX…
We also support

STS supports all major inverter and battery brands. If your Pylontech battery is paired with a specific inverter, visit that brand's page for inverter-specific guidance.

Browse all supported brands
FAQ

Pylontech battery questions answered

Start with the paired inverter's monitoring platform — Pylontech batteries follow the inverter's schedule, not their own. Check the charge window is enabled, grid charge is on, and the SoC minimum is below your current battery level. If the schedule looks correct but charging still doesn't happen, look for a BMS communication fault in the inverter's event log — this stops the inverter from reading the battery's state.
Pylontech US series modules have front-panel LEDs indicating state: solid green = normal operation; flashing green = charging or discharging; amber = warning (commonly cell imbalance or high temperature); red = fault (often protection trip). When you have a stack of multiple modules, each module has its own LED — an amber on one module while others show green usually points to cell imbalance in that unit.
Pylontech uses the widely-supported PYLON protocol over RS485 or CAN bus, making them compatible with many open-protocol hybrid inverters. Common UK pairings include Solis, Sofar Solar, Victron, LuxPowerTek, and SolaX. Important: GivEnergy and Fox ESS are closed battery systems — they only work with their own batteries, so Pylontech cannot be paired with these brands. The inverter must be set to the correct battery type (Pylontech or PYLON protocol) — using generic lithium mode is a common commissioning error that causes BMS faults.
All three are 48V low-voltage LiFePO4 modules. The US2000C provides 2.4kWh per unit; the US3000C provides 3.5kWh; the US5000 provides 4.8kWh. Multiple units can be stacked to reach the required total capacity. All use the same PYLON protocol for inverter communication. For a given total storage target, fewer US5000 modules are needed compared to US2000C — making the US5000 more common in larger installations.
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Ready to fix your Pylontech system?

Tell us your Pylontech model, the inverter it's paired with, and what you're seeing. We'll diagnose the fault — usually same day.

  • Not affiliated with Pylontech
  • Free remote diagnostic · no fix, no fee
  • All compatible inverter brands supported

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Call 07944 877 329 Book free diagnostic