The LG ESS Home Battery Recall: Affected Units and What Owners Were Told

The hazard is a manufacturing one, not a wear-and-tear one. Electrical Safety First links the recall to specific electrode manufacturing issues that could potentially result in thermal instability leading to an overheating incident². LG Energy Solution's own notice states that incidents have occurred and caused damage to property¹. The remedy is free: replacement of affected batteries, removal from the property at no cost, a diagnostic software update intended to identify and shut down batteries at risk of overheating, and compensation for extra electricity costs after a shutdown¹.

For a household, this is the sharpest version of a wider point about energy independence. A home battery reduces reliance on the grid and on a supplier, but it adds a new dependency on a manufacturer's safety programme, its remote update channel and its willingness to stand behind a product years after installation. This page sets out which units are caught, how to check, what the remedies are, and what remains unresolved.

A live safety recall, and why it keeps widening

The defining feature of this recall is that it is not a closed list. LG Energy Solution's serial number checker carries the instruction to check again because the recalls have expanded to include additional models and batteries⁴. The same wording appears on the UK recall notice and the registration page¹. A battery that cleared a check when the recall was first announced may now be caught, and an owner who checked once has no assurance that the answer still holds.

That pattern is not unusual for cell-level defects. The trigger here is a manufacturing issue in the electrode, which is a property of a production batch rather than of a model line, so the affected population is defined by serial number and build, not by the name on the datasheet. Electrical Safety First describes the recall as covering RESU ESS home batteries and lists the affected models as subject to replacement of all potentially affected batteries².

The wider regulatory backdrop matters for how seriously to take it. The government's product safety consultation notes that non-compliant or incompatible battery components and the use of batteries outside their safe design parameters can lead to thermal runaway, causing fires⁶. An official report on domestic battery energy storage systems, published in 2020, put the position bluntly: even though few incidents with domestic battery energy storage systems are known in the public domain, the use of large batteries in the domestic environment represents a safety hazard⁷. A recall of this kind is the system working, but it is also a reminder that a home battery is a large lithium installation sitting inside a dwelling.

For the household, the practical consequence is that the recall is an ongoing obligation to check, not a one-off notice. The maker's own guidance says each affected ESS home battery is marked with a unique serial number, which can be used to identify affected batteries⁴. That serial number is the only reliable identifier, and it is the thing to keep a record of.

Which models are affected

The affected list spans the low-voltage RESU range and the high-voltage RESU H series. LG Energy Solution's recall notice names the models and their model numbers together¹.

Electrical Safety First independently lists the RESU7H Type C, RESU10H Type C, RESU7H Type R and RESU10H Type R as affected models subject to replacement of all potentially affected batteries². The two lists overlap on the H series; the maker's notice is the fuller list and includes the low-voltage models and the RESU10M.

The recall notice describes the affected RESU batteries as LG branded systems¹. That description sits alongside a warning that matters more than the branding: affected batteries may be inside an energy storage system even if it is not LG-branded⁴. A rebadged cabinet, an installer-branded enclosure or a system sold under another name can still contain a recalled RESU module. The badge on the outside is not the test; the serial number on the battery is.

The hazard, and the incidents behind it

The failure mode is thermal. Electrical Safety First attributes the recall to specific electrode manufacturing issues that could potentially result in thermal instability leading to an overheating incident². That is a defect introduced in manufacture, present from new, and not something an owner can detect by watching the battery behave normally.

LG Energy Solution's notice confirms the consequence: incidents have occurred and caused damage to property¹. The notice does not quantify them, and no figure for the number of UK incidents appears in the recall material.

The general risk picture is well documented. The government's product safety consultation states that non-compliant or incompatible battery components and the use of batteries outside of their safe design parameters can lead to thermal runaway, causing fires⁶. The 2020 official report on domestic battery energy storage systems recorded that few incidents were known in the public domain at that time, while still concluding that large batteries in the domestic environment represent a safety hazard⁷. A recall of this scale is what happens when a batch-level defect is identified after installation, and it is the mechanism that keeps a known manufacturing fault from becoming a household fire.

For a household weighing what a battery does for its independence, this is the honest counterweight. The battery reduces dependence on the grid and on a supplier's tariff, but it introduces a dependence on the maker's safety monitoring, on a remote update path, and on the maker still being there to honour a replacement. That is a real exposure, and it is the reason registration matters.

How to check a battery, and where the serial number is

The check itself is simple. LG Energy Solution's guidance is to enter the serial number of the battery in the serial number checker to see if the battery is affected, or to register in consumer registration¹. The support article repeats the instruction: enter the serial number of your battery in the serial number checker to see if your battery is affected⁵. The European checker is also live⁴.

Finding the serial number depends on the model, and the maker gives two different locations.

• RESU3.3, RESU6.5, RESU10 and RESU13: look to the right-hand side of the battery. The serial number label may be partially obscured by battery cables or conduit⁴.
• RESU7H and RESU10H Type C, Type R and Type R (Secondary): there are two places. Underneath the battery, adjacent to the cable entry, and behind the access cover at the bottom right of the battery⁴.

That warning is the maker's own and it is the one instruction on this page that carries a direct physical risk if ignored. A partly obscured label on the right-hand side of a low-voltage unit can be read without moving anything; if it cannot, the check can be done through the registration route instead.

Registration is not optional in the maker's framing. The recall notice states that owners must register an affected battery by going to the serial number checker page and entering the requested details, or by contacting LGESEG by telephone or web¹. Registration is also how a recall reaches an owner at all, which is why consumer bodies recommend registering all electrical appliances so the manufacturer can make contact if a problem arises⁸.

The remedies: replacement, diagnostic update and shutdown

There are two distinct tracks, and which one applies depends on the individual battery.

The first is outright replacement. LG Energy Solution states that it will replace all affected batteries for free or provide a new module and remove the battery from the premises¹. The general remedy wording is that LGESEG will replace the battery for free and remove the affected battery from the property at no cost to the owner⁴.

The second is a diagnostic software update. The maker states that a battery may be subject to voluntary corrective action in the form of a diagnostic software update, and that LGESEG is rolling out a free diagnostic software update which is intended to identify and shut down batteries at risk of overheating⁴. The support article carries the same wording⁵. The update is delivered remotely: LGESEG will be implementing the diagnostic software update through the remote software update function provided by the inverter company⁴. That is a dependency worth naming. The update travels over the inverter's communications link, so a system that is offline, unmonitored or no longer connected to its original platform may not receive it until that link is restored.

Where the diagnostic software shuts a battery down, the replacement track takes over. LGESEG will replace batteries diagnosed by the diagnostic software and remove those batteries from the property at no cost to the owner⁴. The same commitment appears in the support article⁵. A shutdown is therefore not a dead end: it is the trigger for a free replacement and removal.

Remote update capability is a normal feature of modern storage hardware, not a peculiarity of this recall; makers advertise remote firmware upgrades as a standard function of their systems⁹. What the recall shows is the other side of that capability: a remote channel is also the route by which a safety shutdown arrives.

What to do while a battery is affected

The recall material does not instruct owners to switch off an affected battery themselves as a blanket measure. The maker's route is the diagnostic update and, where it triggers, a shutdown and replacement. What the recall does establish is that incidents have occurred and caused damage to property, and that the defect is a manufacturing one present from new¹.

General lithium safety guidance is consistent on what to do if a battery shows signs of damage. Electrical Safety First's e-bike guidance states that if you notice any damage, stop using and charging the battery immediately and replace it¹⁰, and the same wording appears in its e-scooter guidance¹¹. North Wales Fire and Rescue Service advises that in the event of a fire, don't try and tackle it yourself, leave and call 999¹². Those are general rules for lithium batteries in the home rather than recall-specific instructions, but they are the right frame if an affected unit shows any sign of distress.

Storage advice is also relevant for a battery that has been shut down and is awaiting collection. North Wales Fire and Rescue Service states that if a device or equipment is stored without being used for any length of time, the battery should be removed¹². For a home battery that is not a do-it-yourself task, and the recall route is removal by the maker.

The independence point is uncomfortable here. A home battery is meant to keep the lights on when the grid fails, and a recalled unit may instead be shut down and removed, leaving the household back on the grid with no storage at all. That is the trade a recall makes: safety first, and a period of reduced self-sufficiency while the replacement is arranged. Households that want to understand what backup normally looks like, and what a shutdown removes, can read battery backup in a power cut and home battery fire safety.

Compensation, and what former residents should do

LG Energy Solution states that LGESEG is providing compensation to affected consumers to cover any additional expenses incurred due to increased electricity bills or costs associated with using alternate energy sources after the shutdown of the affected batteries⁴. The same commitment appears in the support article⁵. The compensation is tied to the shutdown, so it applies to households whose battery has been taken out of service by the diagnostic software rather than to every registered owner.

The mechanism is a claim against the maker, not a credit on an energy bill. Households dealing with a supplier dispute at the same time should keep the two separate: Ofgem's back billing rules limit what a supplier can recover for energy used more than 12 months ago, with an exception where the customer has acted unreasonably, for example by stealing electricity or gas¹³. That is a supplier rule and has nothing to do with recall compensation, but the two can arrive in the same post.

Former residents have a specific route. LG Energy Solution asks that if you used to live at a property that has one of these products but no longer live there, you get in contact with LGESEG by completing the form¹, and the support article repeats the instruction to complete the form or otherwise contact LGESEG using the published details⁵. A former resident may be the only person who knows the battery is in the property, particularly if the current occupier bought the house without a handover pack.

Contact details published for the recall include a European number, +49 (0) 6196 5719 660, and an Italian number, +39 02 3859 4420⁴. On data, LG Energy Solution states that any data collected in the registration form will not be used for sales advertising purposes and will only be used for product support, campaign and recall purposes⁴.

Where the recall leaves a household's independence

A home battery is bought for independence: less grid import, less exposure to a supplier's peak rates, and some resilience when the power fails. A recall of this kind shows the limits of that independence clearly. The household still depends on the manufacturer for the safety of the unit, on the inverter's communications link for the diagnostic update, and on the maker's willingness and ability to replace and remove a faulty battery at no cost. None of those dependencies can be managed by the household itself.

The recall also shows why registration and record-keeping are part of energy independence rather than an administrative afterthought. A serial number recorded at installation, and a registration lodged with the maker, are what allow a recall to reach the right door. Consumer guidance to register all electrical appliances so the manufacturer can contact you about a problem is the general version of the same advice⁸.

What remains unresolved is the scale. The recall notice confirms that incidents have occurred and caused damage to property but gives no count¹, and the affected model list has grown since the recall began⁴. Owners who checked once should check again, and owners who have never checked should treat the serial number as the starting point. For the wider picture of how recalls and safety notices work in this market, and how the RESU range sits among the alternatives, see home battery recalls and safety notices and LG home batteries.