Home battery storage: should you take the plunge? Mesh Energy explains

Doug Johnson

Home battery storage: should you take the plunge? Mesh Energy explains

With ever-increasing interest in battery storage and with new shiny options being released into the UK market, I thought the topic deserves an honest review to clarify some of the key technology points.


So, should you take the plunge and invest your hard earned money in this tech at present or hold off for now?


The bigger picture

Battery systems are now allowing us to store energy for the home and can work whether you have solar panels installed on your home or not. If you have solar panels you can charge batteries during the day with free excess electricity for use at night. If you don’t have solar, you can use batteries to keep the lights on during power cuts.


Battery systems have been used for years by mariners, caravan and car owners and computer aficionados for years. Batteries and management systems are nothing new, but systems big enough to power our homes seem to confuse many.


Batteries on their own are just a ‘bucket’ for energy. In order to manage charging and discharging of the battery in conjunction with your lifestyle, you will also need other equipment such as charge controllers and other electrical paraphernalia such as protection devices and appropriate cabling.

White poster with lime border reading “HOME BATTERY STORAGE. Should you take the plunge? Mesh Energy explains.”

System practicality

Most basic domestic battery systems have useful storage of between 3kWh – 6kWh. To put this into perspective, a typical UK home uses about 11kWh of electricity per day. As a result, battery storage has a very practical application in protecting the home against power cuts and heavily reducing evening electricity usage throughout the year.


If you have a 4kWp solar installation in the south of the UK, it will typically produce more than 11kWh between the months of March until October allowing you to save electricity for evening and night time usage.


Indeed, if you were to have a power cut at home in the early hours of the morning, in essence if you didn’t change your usage habits you may likely get half way through the day before the battery runs out of useful energy.

Product choice

Although Tesla has done a fantastic job in marketing and raising awareness in the sector, there is a long list of other manufacturers and system providers which have been in the market longer.


Some of the best and most advanced products sold in the UK include: Wattstor, SMA Sunny Island, Tesla Powerwall, Growatt, Powervault, Sonnenbatterie or Samsung. Check these out before going for the shiniest one on the shelf!

System costs

Prices for batteries vary by a fair bit at the moment but the current cost per usable kWh of storage is between £1,000 – £1,500 for the equipment. For a fully installed system including labour and inverter/charger, prices start from around £4,500 for a 3kWh system. For a higher spec 6kWh system this price could easily creep up to nearer £5,000+.


The costs listed above are for systems using traditional lead acid batteries, like those in your car. The likes of Tesla batteries use Lithium Ion technology which is getting plenty of backing, but there are also aqueous batteries for those who are more ‘eco’. All of these different battery types come at different prices to the consumer.

Payback

The dreaded term that all new renewable technology has to tackle… Well, unfortunately, based on standard system payback modelling and the fact that there are no government subsidies for this technology, it means that you won’t get your money back before you have to change the batteries for new ones! As such, battery systems don’t currently pay for themselves using standard modelling like solar PV or heat pumps.


But, if you believe that investment in the sector will reduce battery price and that mains electricity may become more expensive, then you might not have long to wait.


A difficult choice to make...

So, it's safe to say that home battery storage technology systems are in the ‘early adopter’ stage with high relative price and low levels of UK installations to date. For some this is a perfect stage to get involved and if you waste a lot of your solar electrical energy back to the grid or suffer from frequent power cuts at home, you may be raring to get a system installed.


Either way, make sure you do your research before taking the plunge and feel free to contact us directly to see if we may be able to help. (Hint - the answer is likely to be "Yes, we can!")


If you still have any questions about home battery storage,
please don't hesitate to
contact the Mesh team today.

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15 June 2026
Building performance specialist Mesh has completed a building services design project for a new flagship art gallery in Savile Row – Sadie Coles HQ. The six-storey Grade II listed Georgian townhouse in London’s Mayfair, which dates back to the 1730s, has been fully restored and transformed by lead contractor Work Ltd, to create a unique space for contemporary art. The building, once home to the Burlington Fine Arts Club in the 19th century, had been bomb damaged in World War II and used as offices post-war. It has now been sensitively reinstated as a space for artists to exhibit their work in a part of London which has a long association with contemporary art. The key aim of this extensive refurbishment project was to work to a fast-track programme for the gallery’s opening to coincide with the Frieze Art Fair. Mesh was appointed to develop a holistic MEP building services strategy, from concept through to detailed design, and in keeping with the character and constraints of this heritage building. Enhanced control of the internal environment was required to maintain visitor comfort all year round and in the context of continually fluctuating occupancy levels, including events for up to 200 people. Working within a Grade II listed building required a highly considered approach at every stage – historic architectural features were revealed and restored internally and externally, and extensive structural improvements were required to accommodate art loadings. These factors had to be reflected in the services design and specification. Mesh used dynamic thermal modelling for different scenarios of use to understand the heating and cooling loads required and to allow the services to be accurately sized for each room or gallery. Two priorities were cooling and for each area to be individually controlled according to occupancy levels. Discrete but robust heating and cooling provision was designed for the gallery areas and the MEP services were concealed in void spaces to avoid impacting on the architectural features of the building or the layout of the galleries. Plant and equipment had to be sited in compliance with stringent planning requirements, which limited the number, size, position and visual impact of the external units. Passive measures were introduced to reduce energy consumption and included actuated openable rooflights in a glazed lantern to purge warm air during the day and reduce the reliance on the active cooling system. Giles Reid, Giles Reid Architects: “The new gallery has succeeded in its ambition – to reaffirm that London has an important position in the global art world. This was a complex project which had to be delivered in just nine months from planning approval for the fixed deadline for opening, and despite having to carry out extensive structural alterations. The building is performing well from a services perspective, including at the opening event which was attended by around 800 guests. The M&E design in contemporary art spaces like this must never detract, visually or acoustically, from the art being exhibited and this has been successfully achieved. This is a fantastic statement building which has been acclaimed and the Client is thrilled. It is a credit to everyone involved that this historic building has been brought back into use for contemporary art.” Doug Johnson, Founding Director of Mesh: “This project demonstrates exactly what intelligent building services engineering should deliver – an integrated, high-performance solution to deliver year-round-comfort for visitors and users of the building whilst maintaining a clean aesthetic. Working within a Grade II listed building with complex planning restrictions required genuinely creative engineering rather than a conventional response. We are really proud to have contributed to this outstanding building transformation.” The Project Team: Client: Sadie Coles HQ Lead contractor (design and delivery): Work Ltd Architectural partner: Giles Reid Architects MEP design / building performance: Mesh About Mesh Mesh offers a range of design and engineering services to help organisations in the public and private sectors to improve the energy efficiency of new and existing buildings, housing and estates. This includes support for architects; planning; thermal modelling and overheating analyses; carbon reduction strategies; feasibility studies for renewable technologies; MEP design, and regulatory compliance. Architectural images - Joseph Asghar
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