Battery Storage Solutions

Add a Tesla battery storage to your home to benefit from more affordable electricity all year round. Tesla Powerwall 3 batteries can be charged either when electricity is cheaper, such as overnight, or by using solar panels.

H2ecO has been leading the local Dorset renewable industry for 15 years. We have been installing battery storage devices to happy customers for nearly as long as that. We were among the very first group of installers certified to install the Powerwall 1 in the UK.

Thanks to our personable and professional installation service, we have excellent reviews from happy customers.

Fill out a quick and convenient form or call us for a competitive quote.

Check out our other eco-efficient technologies.

H2-eco currently offer three premium battery solutions:

  • GivEnergy solutions can be part of a new PV installation with a hybrid inverter or can stand alone with their own battery inverter. Battery sizes of 5-13.5kWhours are available. Stand-alone systems are typically in the £5000-£8000 range for 9.5 to 13.5kWhours of storage.
  • Solar Edge Energy Bank provides 9.7kWhours of DC-coupled battery storage for an installed cost of around £8000. This battery will only function as part of a Solar Edge PV system.
  • The Tesla Powerwall 3 provides 13.5kWhours of AC-coupled battery storage with full-house back-up in the event of a grid outage for an installed cost of around £7,500. Powerwall 3 can also operate as a hybrid inverter to operate a new or existing PV system.

Batteries are currently zero-rated for VAT, whether installed as a stand-alone system, added to an existing PV system or installed with a new PV array.

Why Choose Us for Your Renewables?

Renewable Energy for Business
  • Renewable Energy Dorset 5 Year comprehensive, insurance backed warranty
  • Renewable Energy Dorset Fully accredited Micro-generation Certification Scheme (MCS) components
  • Renewable Energy Dorset All installations are led by a fully qualified Part P, 18th Edition PV installer
  • Renewable Energy Dorset £5M third party insurance
  • Renewable Energy Dorset We are a stable and reliable renewables company with a strong future in the industry
  • Renewable Energy Dorset Tidy & responsible, we treat your home with the respect it deserves
  • Renewable Energy Dorset Servicing available for existing renewables installations

How does Tesla Powerwall battery storage work?

Tesla Powerwall battery storage – powered by the Tesla Powerwall 3 – stores excess electricity generated by either your solar PV system during the day so that energy is available when you need it, or by using lower priced electricity at night to move to the next day.

This approach to energy storage provides:

  1. All Year Power: Your solar panels generate electricity during daylight hours, or charge your batteries when electricity costs are at their lowest.
  2. Storage: Excess energy is stored in the Tesla Powerwall battery instead of being sent back to the grid. This gives you power on demand.
  3. Backup: Power your entire home during grid outages and never lose power with a full-home energy backup.
  4. Smart energy management: The system manages when to charge and discharge based on usage patterns, time-of-use tariffs, and solar production, helping you to save money and reduce grid reliance.

Key benefits of Tesla storage batteries in the UK

  1. Cost savings: Excess energy generated from the solar panels can be used during off-peak grid times, lowering your electricity bills.
  2. Seamless integration with solar system: Powerwall 3 can function as a hybrid inverter, managing both new and existing photovoltaic (PV) systems.
  3. Scalability: The system allows expansion up to 54 kWh with DC expansion packs, accommodating varying energy storage needs.

Technical Specifications for Tesla PowerWall 3

  • Storage capacity:5 kWh (AC-coupled)
  • Inverter type: Hybrid inverter for solar integration
  • Continuous power output: From 3.68 kW to 11.05 kW (subject to local grid approval)
  • Scalability: Expandable up to 54 kWh with DC expansion packs
  • Dimensions: 1099mm (H) x 609mm (W) x 193mm (D)
  • Weight: 125 kg
  • Installation Options: Wall or floor mounted. Suitable for indoor or outdoor use.
  • Warranty: 10 years

See it in action

This video describes the experience of Robert, an early adopter of sustainable energy, who installed solar panels on his roof seven years ago.

He has recently added a Tesla Powerwall to further his solar energy use throughout the night.

Now the vast majority of electricity that his family uses at home comes from the sun.

Download TESLA Powerwall brochure

H2-eco were within the first group of UK certified installers and have been installing Tesla batteries since they were first available in the UK.

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Financial benefits of Tesla battery storage

There are several real-world examples of Powerwall 3 owners having financial benefits because of the technology. Reports claim that homeowners have saved up to £1,400, demonstrating that Tesla battery storage can provide:

  • Year-round solar savings: Make year-round cuts on energy bills by avoiding peak energy times and maximising your own use of any solar production you may have.
  • Protection against price surges: Protect against rising utility prices by reducing reliance on electricity price fluctuations.
  • Have the option to participate in Grid energy events: With the right tariffs you may be able to take part in grid events where you are paid for importing or exporting energy to support the grid at elevated rates.

How much does Tesla’s Powerwall 3 cost?

  • Purchase & Installation: Approximately £7,500. This includes the Powerwall 3 unit and standard installation services.
  • VAT: Currently, battery installations are zero-rated for VAT, whether installed as a stand-alone system, added to an existing PV system, or installed with a new PV array. ​

How does Tesla Powerwall 3 installation work?

H2ec0 provides a comprehensive and hassle-free installation service, beginning with you.

  1. Get in touch and tell us what you need: Contact our friendly team by phone and tell us your requirements. You can also email us or use the online web enquiry form if you prefer.
  2. Survey & estimation: We’ll provide an estimation of the cost initially based on a discussion with you about the battery location, then clarify by sending an engineer round to your property to survey and finalise your quote.
  3. Installation: We pick a time that suits you to come round and start the project. We will only request payment after the project is completed to your satisfaction.
  4. Handover: We provide a comprehensive handover visit once work is completed, setting up the relevant apps and guiding you through how they work.
  5. Postinstallation care: We also offer thorough after-care for installations, making sure your Powerwall stays in top condition.
Solar PV Servicing

Servicing, maintenance & repair

Your Tesla Powerwall 3 is built to deliver reliable, long-term energy storage with minimal fuss — but like any high-performance system, a little expert care goes a long way.

At H2ecO, we offer fast, dependable repair and maintenance services to keep your battery system performing at its best, year after year. Whether we installed your Powerwall or you’re switching to us for better support, our experienced team has you covered.

From running diagnostics and software updates to inspecting wiring, connections, and battery health, our skilled engineers ensure your setup runs like clockwork. And if you ever hit a snag, we’re quick to respond with fault-finding and repairs that keep your home powered and protected.

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Battery Storage FAQs

With 13.5 kWh of usable capacity, Powerwall 3 can cover most homes’ energy usage for approximately 13.5 hours at a 1kW usage rate. But their scalability allows you to increase energy volumes up to 54 kWh using DC expansion packs.

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