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Problem diagnosis · Dyness

Dyness Tower-Pro HV Faults — BMS Alarm, Insulation Error & Module Stack Diagnosis

Your Dyness Tower-Pro is showing a fault. The inverter has flagged a BMS alarm, an insulation error, or a module communication failure — and the battery has stopped charging or discharging. Tower-Pro systems operate at high voltage, so diagnosis needs to be methodical and safety-first. This guide covers every common fault path.
  • HV battery fault diagnosis
  • Tower-Pro 2–6 module stacks
  • All compatible inverter pairings
Tower-Pro showing a fault or alarm?

We analyse the inverter event log and BMS data to determine whether the fault is transient, a configuration error, or a hardware issue requiring on-site work.

Book your free remote diagnosticBack to Dyness hub

Independent — not affiliated with Dyness.

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
⚠️

Safety critical: The Dyness Tower-Pro operates at high voltage (100–400V DC). Do not open the tower enclosure, disconnect modules, or touch HV cables unless you are an HV-qualified engineer. Isolate at the DC switch and AC isolator before any investigation. If you see arcing, smell burning, or notice swelling on any module, evacuate and call 999.

Diagnostics

5-step Tower-Pro HV fault diagnosis

Tower-Pro faults fall into two categories — BMS alarms (internal battery management) and insulation faults (safety/wiring). Start by identifying the alarm type from the inverter event log, then follow the correct diagnostic path.

1

Check the inverter event log for the specific alarm code

Dyness Tower-Pro faults are reported through the paired inverter's monitoring platform. Navigate to the event log and look for the alarm:

Common Tower-Pro alarm types
HV insulation fault: Ground leak between DC circuit and earth — safety-critical, isolate immediately
BMS communication error: Inverter lost contact with Tower-Pro BMS — usually configuration
Cell overvoltage/undervoltage: Individual cell outside safe window — BMS protection trip
Over-temperature: Module temperature exceeded safe limit — ventilation or ambient issue
Module address conflict: Two modules with same DIP switch address — communication failure

The alarm code determines which diagnostic path to follow. If you cannot access the event log, we can retrieve it during a remote diagnostic session.

2

Determine whether it is an insulation fault or a BMS alarm

These require completely different responses:

Insulation fault (safety-critical)

Current leaking between HV DC circuit and earth. Causes: moisture ingress, damaged cable insulation, loose earth connections, condensation from temperature cycling. Isolate immediately. Do not restart. Requires HV-qualified engineer for investigation.

BMS alarm (configuration/degradation)

Internal battery management issue — cell imbalance, temperature protection, module address conflict, or communication failure. Usually a configuration error or gradual degradation. Most are resolved remotely or with minor on-site adjustments.

If you're unsure which type you have, treat it as an insulation fault — isolate first, then investigate.

3

Check module stack addressing and master-slave configuration

The Tower-Pro uses a modular stacking design — 2 to 6 modules per tower (3.84kWh each). Each module needs a unique address:

Master module: Communicates with the inverter via CAN bus. Only one module should be master.
Slave modules: Communicate through the master via inter-module link cables. Each needs a unique address.
Address conflict: Two modules with the same DIP switch setting cause a CAN bus conflict — the BMS reports a communication error.
After adding a module: Update the address on the new module, update the battery count on the inverter, and verify total capacity matches.

DIP switches are accessible on each module. Check the Dyness Tower-Pro installation manual for the correct addressing scheme for your stack size.

4

Check for cell imbalance in the affected module

Each Tower-Pro module contains LiFePO4 cells in series. Cell imbalance develops over time:

Mild imbalance (under 100mV): Try full charge to 100% SoC → rest → full discharge to minimum SoC. Repeat 2–3 times. This allows the BMS balancing circuitry to work.
Moderate imbalance (100–200mV): Extended balancing cycles may help, but the module is showing age-related degradation.
Severe imbalance (200mV+): Cells are likely degraded beyond recovery — module replacement needed.

Systems on Octopus or time-of-use tariffs with deep daily cycling tend to show cell imbalance sooner. Modules that have been held at very high SoC for extended periods without regular cycling are also more prone.

Cell-level voltage data may be available through the inverter's battery monitoring screen or via a remote diagnostic.

5

Isolate the faulty module from the stack for individual testing

If the fault persists after addressing and rebalancing checks, a single module in the stack is likely the source. To identify it:

Module isolation procedure
1. Isolate completely — AC off, DC off, wait 60 seconds
2. Remove one module from the stack
3. Update the battery count on the inverter
4. Restart the system with remaining modules
5. If the fault clears, that module is the source
6. Repeat for each suspect module if needed

Do not attempt this yourself. Tower-Pro modules operate at high voltage. Module removal and reconnection must be carried out by an HV-qualified engineer. We can identify the suspect module remotely from BMS data and provide a clear brief for the on-site engineer.

Safety: HV battery work requires appropriate PPE and lockout/tagout procedures. Never assume a module is de-energised — always verify with a multimeter.

About the Dyness Tower-Pro HV battery system

The Dyness Tower-Pro is a high-voltage modular battery system designed for residential and small commercial solar installations. Each module provides 3.84kWh of usable capacity with a 1C charge and discharge rate, meaning the full module capacity can be charged or discharged in approximately one hour. Towers support 2 to 6 modules (7.68–23.04kWh total), carry IP55 protection for outdoor installation, and include a 15-year warranty. Some configurations include an integrated fire suppression module.

Tower-Pro systems pair with hybrid inverters via CAN bus communication. Because the Tower-Pro is inverter-agnostic, the correct protocol and battery type must be selected on the inverter side — just as with other third-party batteries. We see Tower-Pro faults most commonly in three situations: initial commissioning where the inverter battery type or protocol is wrong, stack expansions where a new module was added without updating the address and battery count, and aging systems where cell imbalance has developed over years of cycling. The Tower-Pro B4850 (the low-voltage variant) uses a different protocol and voltage range — they cannot be mixed.

Back to

Return to the Dyness brand hub to explore other common faults and services.

Dyness support hub
FAQ

Tower-Pro HV faults — common questions

An insulation fault means current is leaking between the HV DC battery circuit and earth. Common causes include moisture ingress, damaged cable insulation, loose earth connections, or condensation from temperature cycling. This is safety-critical — isolate the system immediately and do not restart until an HV-qualified engineer has investigated.
Most commonly caused by module address conflicts — two modules with the same DIP switch setting. Other causes: loose inter-module link cable, incorrect battery count on the inverter, or firmware mismatch between the Tower-Pro BMS and inverter. A power cycle clears transient faults. Persistent errors need addressing and configuration checks.
The Tower-Pro supports 2 to 6 modules per tower, giving 7.68kWh to 23.04kWh total capacity. Each module must have a unique address. When adding modules, update the battery count and total capacity on the inverter. The 1C charge/discharge rate means each module can fully charge or discharge in about one hour.
No. The Tower-Pro is a high-voltage system and the B4850 is low-voltage (48V). They operate at completely different voltage ranges and use different protocols. They cannot be mixed in the same installation. To expand, add more modules of the same type — Tower-Pro to Tower-Pro, B4850 to B4850.
Our free remote diagnostic and covers the full alarm analysis — BMS fault codes, cell voltage data, stack configuration, and inverter compatibility. Tower-Pro operates at high voltage, so physical inspection requires an HV-qualified engineer. If a site visit is needed, we provide a clear scope and quote before booking.
Book

Dyness Tower-Pro showing a fault?

Tell us the alarm code from your inverter portal, how many modules are in the stack, and what happened before the fault appeared. We'll analyse the BMS data and provide a clear diagnosis.

  • Free remote diagnostic · no fix, no fee
  • HV battery fault specialist
  • On-site HV engineer available

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