It may be a setting or a calibration problem rather than the battery itself. Our remote diagnostic is free, and we only charge if we fix it remotely.
Book a free remote diagnosticMy GivEnergy Solar/Inverter/Batteries system went down and the GivEnergy Administrators are totally non- existent/useless. Luckily, I found Ron, who used to be a GivEnergy Installer, and beyond my wildest dreams, he sorted everything out remotely from 200 miles away. His approach to everything is very professional and I cannot recommend him more highly. Thanks very much Ron!!
Givenergy panels and battery had been offline for a couple of months after various changes by Givenergy to their app etc. Ron did a fantastic job of sorting it out - got things up and running almost immediately, followed by some fine tuning to get things fully configured. What a legend - great service, great comms, great result.
Ron was very knowledgeable and patient as we worked through the cause of Givenergy Hybrid Inverter suddenly failing (with 0W grid). He was able to quickly identify the probable cause, and point me in the right direction to identify the ‘burnt out’ AC isolator switch & piece of cable, which I was able to find a local electrician to replace. The best £95 I have spent. Thanks Ron.
I can’t praise this firm enough. After hearing my solar panels rattling in very windy conditions, I contacted Solar Tech (as my installers no longer trade). Ronald was fantastic at explaining what he thought the issue was likely to be. Communication was great throughout keeping me fully updated. The team worked really hard on the day to carry out the necessary work. I can now sleep soundly at night without worrying about the solar panels on my roof. I would thoroughly recommend this firm. Thank you for sorting the problem out.
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. 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.
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.
Each one is explained further down the page, with links to the full STS guides.
Over a normal day the percentage should rise while it charges and fall while it powers the house, without sudden jumps. Check it is not paused, the inverter light is green (steady or flashing) and the battery light is solid green.
The app always counts from 0 to 100%, however much the cells hold. A worn battery and a healthy one can both read full.
Photograph every battery's label and the inverter's, and screenshot the Software tab in the GivEnergy portal.
Only a qualified engineer should open, disconnect or service a battery module. Your part is the battery button, the isolators and the DC MCB, used in the right order.
Battery off first, the battery DC MCB last, then wait. The DC MCB is never used as an on/off switch.
A battery can look dead when it is only paused, cold or set up wrongly. Rule those out first.
In the GivEnergy app or portal, the percentage should climb while the battery charges, overnight or from solar, and drop while it runs the house. The state-of-charge history graph should move in smooth curves. Steep drops or jumps point to calibration drift, covered in our calibration guide.
A paused battery will not charge or discharge, whatever the schedule says. In givenergy.cloud go to My Inverter, then Remote Control, then Battery, and look at Pause Battery. It is one of the most overlooked reasons a working battery looks broken.
On the inverter, solid green means it is running normally and flashing green means it is in waiting mode, which is fine. The battery's status light should be solid green. Red means a fault, except flashing red on a Gen 1 or Gen 2 battery, which means its charge is very low. Battery faults are recorded under My Inverter, then Event Log. The hardware checks guide explains each light.
With more than one battery, their percentages should stay within a few points of each other. A gap of 10% or more that is still there when the system is idle needs a closer look.
Below about 0°C the battery stops charging to protect its cells, and at around 5°C it can hold up to 10% less. There is no heater inside. More in GivEnergy batteries in cold weather.
Our free remote diagnostic tells you whether it is the battery itself or something around it, so you know what you have before you describe it to anyone.
The number in the app is useful day to day. It is not a measure of how healthy the battery is.
The battery management system (BMS) scales the gauge so that full reads 100% and empty reads 0%, whatever the cells really hold. A battery that has lost capacity still climbs to 100%; it just gets there sooner. Our field note on measuring a battery's real capacity shows why.
The BMS counts energy in and out, so its idea of full and empty drifts if the battery rarely sees a complete cycle. A soft calibration resets that. It does not bring back capacity the cells have lost.
The BMS also reports a calibration capacity, which can drift below the figure on the label. Treat it as a pointer, not a test result. Some Gen 1 5.2 and 2.6 packs are a special case, covered in 80% batteries and the 2024 firmware.
The honest way to know capacity is to charge to full, run the battery down in one go under a normal load, and count the kilowatt-hours that come out. The GivEnergy BMS also reports a state of health figure, which independent apps such as InvLocal (invlocal.app) show on their battery cards. InvLocal is not affiliated with or endorsed by GivEnergy, and STS has no link with it.
Our remote health check includes a battery health review: charge and discharge patterns, BMS events, and estimated capacity against the rated figure, with a written report. It needs access to your monitoring account.
Remote health checkGather the details while the system is still running and the portal still shows it.
Each battery and the inverter carries a label with its model and serial number. Take a clear, straight-on photo of each one. Battery model codes start GIV-BAT-, All in One codes GIV-AIO- and hybrid inverter codes GIV-HY-.
In givenergy.cloud, the Software page under My Inverter lists the inverter ARM, inverter DSP, battery BMS and dongle versions separately. Screenshot it. Our firmware update guide explains each one.
Gen 1 and Gen 2 BMS firmware is mostly in the 3000 series (an early Gen 1 pack that was never updated can show 1036 to 1041), Gen 3 packs run the 4000 series, and All in One batteries BAAA and BADA numbers. Numbers from different ranges cannot be compared, and the number does not tell you the generation: an E.ON-era Gen 1 5.2 can show 4001, as 80% batteries and the 2024 firmware explains. Go by the label and model code. The BMS firmware list covers each version.
Screenshots of the Software page, a week of the state-of-charge history and the event log give you a record of how the battery was running before it left.
Updates can reset settings, and firmware from an unofficial source can leave a working unit dead. STS does not publish firmware files.
Switching a battery off is something you can do yourself. Disconnecting it is not.
You can use the battery button, the AC isolator, the DC isolator on the bottom of the inverter and the battery DC MCB yourself, in the order set out in Check 5. The only cover you lift is the plastic cover over the battery's DC MCB on a Hybrid (or the lid of a Gen 1 battery's separate MCB enclosure), or the DC cover on an All in One.
Only a qualified engineer should open, disconnect or service a battery module. Never open the battery or inverter enclosure: the cells and capacitors inside hold charge even after the system is isolated. Disconnecting any wiring, or working on the DC cables, is for a qualified electrician.
Low-voltage GivEnergy packs are 51.2 V nominal LiFePO4 modules. Depending on the model, each one weighs between 35.5 kg and 110 kg. Specs for every pack are on our GivEnergy battery guide.
Whenever a GivEnergy battery has to be switched off, for an electrician, a fault or anything else, the order matters.
Battery button off first, then the AC isolator, then the DC isolator on the bottom of the inverter (AC-coupled inverters have none; on Gen 2 and Gen 3 it is what GivEnergy's guide calls the toggle switch). The battery DC MCB goes down last. Wait at least 2 minutes before restarting; 5 is safer. Step by step: Hybrid shutdown.
Blue button off, AC isolator off, then the DC MCB down inside the DC cover. Wait 60 seconds. Step by step: All in One shutdown.
It is a protection device. Opening it while current is flowing is hard on the MOSFETs, the electronic switches inside the battery and inverter, which is why it always comes off last. The full procedure for every brand is in our shutdown guide.
The GivEnergy portal links your system to your account through the inverter's WiFi serial number, from its plug-in dongle or its built-in WiFi. Batteries are not linked: the inverter reads them, so a battery can be sold or swapped without touching the account. An inverter with built-in WiFi (Gen 2, Gen 3 and All in One) stays registered to you, and shows as already registered to anyone else, until you transfer it to the buyer in the GivEnergy app. Our monitoring transfer guide gives the steps. A Gen 1 or AC-coupled inverter has a white plug-in WiFi dongle, which can move straight from the old inverter to a replacement that takes the same dongle.
Selling one battery and keeping the rest? In a low-voltage GivBat stack each pack has its own DIP-switch address, and the inverter has to see the ones that remain. We can check that remotely, along with cell voltages and BMS events.
If the battery takes part in Axle Energy's grid events, leave from your Axle account before it goes. Leaving closes the membership and stops Axle controlling the battery, with no exit fee. Our Axle Energy guide shows how.
The same checks apply to a GivEnergy inverter, with two additions.
A green light (steady, or flashing while it waits), a clean event log, and the inverter ARM and DSP versions from the Software page. Photograph its label too: hybrid model codes start GIV-HY-.
The settings live in the inverter, not the battery. Before an old inverter goes, capture the system mode, every charge, discharge and export slot, the export limit and the reserve, so whoever sets up the replacement has them.
Replacing an inverter because it stopped working? Firmware, settings and comms faults often look like dead hardware, and a free remote diagnostic tells you which it is.
Free remote diagnosticOnce the checks are done, this is who to ask.
Sell My Solar, our sister company, buys used GivEnergy batteries and inverters from homes across mainland England and Wales. Its website explains how selling to it works.
A private sale will usually get you more for it, but Sell My Solar makes selling easy. What a battery is worth is for the buyer to say, and Sell My Solar will tell you. The checks above mean you can describe exactly what you have.
Soft and portal calibration, and what a healthy state-of-charge graph looks like afterwards.
Calibration guideWhy the percentage hides lost capacity, and how one full discharge measures what is really there.
Battery discharge testEvery Gen 1 and Gen 2 BMS version GivEnergy logged, and what changed in each one.
BMS firmware listWhere each version is shown in the portal, and what can go wrong when you update.
Firmware update guidePause state, isolator positions, what the lights mean, and the cold-weather charging lockout.
Hardware checksThe safe order for every brand: battery first, the battery DC breaker last.
Shutdown guideHybrid and All in One sequences, step by step, with the waits in between.
GivEnergy restart guideHow to transfer a system to the buyer in the GivEnergy app, and how accounts link owners and installers.
Monitoring transferWhat cover may still be open now the manufacturer is in administration.
Warranty routesIf a check on this page turns up a fault, a percentage that jumps or a pack the inverter cannot see, book a free remote diagnostic. We will tell you straight what is wrong and whether it can be fixed remotely.
I’ve worked on hundreds of GivEnergy systems and know the kit inside out. If yours is playing up, my promise is simple — no fix, no fee: just £125 if we fix it, free if we don’t.
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