Moixa and GridShare: What Happened to the Company

Moixa no longer trades as an independent home battery company. Lunar Energy acquired Moixa on 24 August 2022, describing it as a global software company for distributed energy resources management, and the GridShare Membership scheme that Moixa sold to battery owners is no longer offered. Anyone searching for Moixa GridShare today is usually an existing battery owner trying to work out what happened to a reward, a warranty or a payment.

The scheme itself was straightforward while it ran. GridShare Membership was a free programme open to Moixa Battery owners, paying a guaranteed £50 annual reward for the first three years of membership, with reimbursement for savings lost when the battery was used for grid services¹. Membership ran on a three-year contract and carried a warranty benefit for as long as the household remained a member¹.

The dependence it created is the part worth understanding. A household that joined handed a degree of control of its battery to a third party's software platform, in exchange for a modest annual payment and extended warranty cover. When the company behind that platform was acquired and the scheme closed, the household kept the battery but lost the reward, the extended cover and the route to the original provider.

What happened to Moixa: the Lunar Energy acquisition

Moixa's history in UK home energy runs back further than GridShare. The company won a £1.3m contract for an energy storage demonstration in April 2014, under a government solar strategy that funded storage trials³. By April 2019 it was supplying both the interface and the energy storage units for the EFES project, a vehicle-to-grid and home storage trial⁴. It was also a consortium member on the V2GB vehicle-to-grid project alongside Nissan, Energy Systems Catapult, Cenex, Western Power Distribution, National Grid ESO and Element Energy⁵.

That record matters because it explains what Lunar Energy was buying. Moixa had become a software business, managing distributed energy resources rather than making batteries, and GridShare was the product of that shift. The acquisition completed on 24 August 2022, and the GridShare Membership page that households relied on carries a date of 7 March 2022, months before the sale¹.

The practical consequence for a household is that the counterparty changed. A membership agreement made with Moixa passed into a company whose stated focus was home electrification at scale, and the consumer-facing membership programme was not carried forward. There is no published successor scheme for Moixa battery owners under the GridShare name.

GridShare Membership: what it was and who could join

GridShare Membership was Moixa's free membership programme, open to any Moixa Battery owner after installation, at no cost¹. The eligibility wording was tighter than the headline. It was only available to customers who had purchased batteries directly from Moixa, and only select customers who had bought from third parties were applicable¹.

That distinction is the first thing to check if a household is trying to establish whether it was ever a member. A battery bought through an installer or a third-party supplier may never have qualified, regardless of the hardware being identical.

Membership ran on a three-year contract¹. Within it, the household agreed that its battery could be used to support the UK energy network, and Moixa agreed to pay a reward and to reimburse savings lost as a result. The scheme was one of a number of household flexibility arrangements that pay for control of a home device, a category that includes supplier-run demand flexibility and smart charging trials⁶.

For a household's energy independence, the trade is worth naming plainly. The battery stays on the property and keeps storing cheap off-peak electricity, which is a genuine reduction in reliance on peak-price grid power⁷. What the household gives up is exclusive control of when the battery charges and discharges, and it takes on a dependence on a company's software, its servers and its continued trading. That last dependence is exactly what failed here.

How the virtual power plant worked: 25,000 batteries and 250MWh of storage

GridShare's proposition was aggregation. Rather than one household battery responding to grid signals, Moixa's software coordinated many, presenting them to the network as a single controllable resource. By January 2021 the software had connected over 25,000 small-scale residential batteries².

The scale of that fleet sits in context against the wider storage picture. Grid-scale battery storage in Great Britain reached 7.3GW by June 2026, according to the government's clean flexibility roadmap⁸. A distributed fleet of home batteries is a different kind of asset: smaller individually, but sitting behind the meter where it can also serve the household's own consumption.

Participation was not universal even among members. Moixa stated that only batteries within its contracted areas were used to support the UK energy network¹. A household could hold membership and still see its battery never called on, because no flexibility contract covered its region.

Where a battery was called on, the arrangement was a form of domestic virtual power plant, the same principle later applied to electric vehicles in vehicle-to-grid trials⁵. The household's stored energy became a small part of a network service, and the household was paid for the inconvenience rather than for the electricity itself.

The rewards: £50 a year for three years, plus reimbursement for lost savings

The headline payment was a guaranteed £50 annual reward for the first three years of membership¹. Alongside it sat a separate reimbursement for savings lost when the battery was used for grid services. Moixa measured and reported the impact on the household's usual battery behaviour and then reimbursed any savings lost¹.

The reimbursement was calculated by simulating how the battery would have behaved had it not taken part in grid services, then working out lost savings using either the household's actual tariff or an assumed tariff rate where no tariff information was provided¹. Moixa's own worked example showed a £15 annual reimbursement against a £50 annual reward, giving a £50 net benefit in that case¹.

For scale, other household flexibility arrangements pay differently. A smart charging trial offered participants £10 each month⁹, and independent modelling of smart tariffs combined with low-carbon home technologies found savings of up to around £800 a year were possible¹⁰. Those are different products with different obligations, but they show that £50 a year is at the modest end of what households are paid for handing over control of a device.

The warranty benefit: cover for as long as you remain a member

The most valuable part of GridShare Membership was probably not the cash. Moixa's terms promised a warranty for as long as the household remained a member¹. Independent guidance on home battery storage lists the Moixa Smart Battery in 2kWh and 3kWh sizes with a 10-year warranty, extendable for GridShare members¹¹.

That structure tied the warranty to continued participation. A household that left the scheme, or whose membership lapsed, lost the extension. A household that stayed kept cover, but only for as long as the company behind the scheme continued to honour it.

This is the clearest illustration of the dependence a scheme like GridShare creates. The battery is a physical asset on the property, but the longest warranty term depended on a commercial relationship with a company that no longer operates the programme. Households weighing any similar offer should read the warranty condition as carefully as the payment.

Where GridShare fell short: contracted areas, predictable consumption and uptime rules

Three limits shaped what a member actually got. The first was geography: only batteries within Moixa's contracted areas were used to support the network, so members outside those areas held membership without their battery ever being called on¹.

The second was consumption pattern. Automated personalised charging plans were only available for homes with predictable household consumption patterns; households without predictable consumption could still use a time-of-use tariff through static charging plans¹. Members in an active flexibility or grid services area could not have an automated personalised charging plan at all, though their battery could still work with a time-of-use tariff through a static plan¹.

The third was the underlying delivery record of UK energy schemes. An independent consultation found that schemes have been complex, not properly resourced and not given enough time to gain momentum or build capacity¹². Scotland's call for evidence on heat and buildings cited ineffective partnership working, including management of the Capacity Market and the Green Homes Grant Voucher Scheme, as an example¹³. GridShare was a commercial product rather than a government scheme, but it operated in the same crowded, short-lived landscape.

The pattern across UK energy support is one of schemes opening, running for a period and closing. The Metering and Monitoring Service Package has accepted no new applications since scheme closure on 31 March 2022, with post-closure accreditation only through transfer of ownership¹⁴. The Green Homes Grant and Home Upgrade Grant are now closed¹⁵, the Green Deal is closed to new applicants¹⁶, and applications for Energy Bills Discount Scheme heat network support can no longer be made¹⁷. A household joining a time-limited energy scheme should assume it will end.

GridShare is no longer offered: what that means for existing members

GridShare Membership is not available to join. The programme was sold by Moixa, Moixa was acquired by Lunar Energy on 24 August 2022, and no successor consumer membership scheme under the GridShare name has been published. The published terms, reward figures and contact addresses date from 7 March 2022¹.

For a household that was a member, the practical position is that the reward stream has stopped and the extended warranty benefit tied to continuing membership has no obvious provider. The battery itself is unaffected as a piece of equipment: it still charges, still discharges and still stores cheap off-peak electricity for the home⁷.

What has gone is the revenue and the cover. Households with an unresolved complaint about a scheme or a supplier have formal routes: the energy ombudsman service handles disputes between domestic customers and suppliers¹⁸. Where a payment has been missed, network operators may owe an additional £40 in some circumstances¹⁹, and guaranteed standards in Northern Ireland set compensation of £50 for a home and £125 for business premises for a failure to restore supply, then £25 for every 12 hour period after that²⁰. Those are network standards, not scheme payments, and they do not replace a lost GridShare reward.

Leaving GridShare: what changes for your battery and your export tariff

A household that stops participating, or whose scheme has ended, keeps the battery and its household benefits. Independent guidance is clear that installing battery storage lowers the amount of electricity exported to the grid, reducing export payments, but that overall savings are greater than relying on export payments⁷. The battery earns its keep by cutting imports, not by exporting.

The export tariff interaction is the one to check. The Smart Export Guarantee requires electricity suppliers to pay small-scale generators for low-carbon electricity exported back to the National Grid²². Payments are exclusively an export tariff, based solely on how much electricity is exported, as recorded by a smart meter⁶. In scheme year five, 337.8 GWh, or 76.2%, of SEG exports were on tied tariffs⁴. Some smaller suppliers, including 100Green, offer export tariffs for solar panel users that are not covered by the Smart Export Guarantee⁶.

The critical point for battery owners is that having a storage battery may render a household ineligible for some SEG tariffs¹¹. A battery reduces exports, and therefore reduces export payments, whatever scheme sits alongside it. The Feed-in Tariff scheme is closed to new applicants²³, so a household on an existing FIT arrangement should check how its battery affects metered export rather than assume the two are independent.

If a household is considering switching supplier or tariff after leaving a flexibility scheme, exit fees apply to some fixed-rate tariffs, and the sensible comparison is the exit fee against the savings available from moving²⁴. Switching routes for households with solar panels are set out in supplier guidance⁶, and general switching guidance notes potential savings of up to £497 on yearly bills²⁵. Those figures are not GridShare payments and should not be read as replacing them.

For the wider picture of how monitoring, metering and flexibility schemes fit together in a UK home, the smart meters and home energy management guide sets out the underlying systems, and household flexibility and reward schemes covers the alternatives that remain open. Households comparing a battery's own monitoring and control arrangements can read app subscriptions and cloud dependence, which deal directly with what happens when a manufacturer's platform changes.