Store low-rate energy, cut your bills every day

Certified Tesla Powerwall installers with hundreds of completed installations. Charge on low overnight rates, use stored energy at peak hours and save as much as £1,500 annually.

Sleek, white Tesla Powerwall 3 with a red switch on the side, standing on a reflective surface.

Why choose EPC

Savings designed around your home

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Custom system design

We assess your property, usage patterns and tariff before designing your system for maximum daily savings.

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Certified installation quality

MCS certified, Tesla Powerwall certified and Trustmark registered engineers on every installation we complete.

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Long term support included

Ongoing servicing, monitoring and tariff optimisation support included as standard for years after installation.


Solar & Battery Package

Opt for a Solar Panel and Tesla Powerwall Battery package to generate and store the energy.

This solution stores excess energy for use when you need it most, ensuring that you're saving money and contributing to a more stable and sustainable energy grid.

Whether it's to avoid peak tariffs or to have a backup power supply, our battery storage solutions offer flexibility, durability, and superior performance. Let us help you take control of your energy usage with a system that's smart, scalable, and secure.

Tesla Powerwall

You're in safe hands

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Common questions

Do I need solar panels to benefit from Powerwall?
No. Powerwall delivers strong savings on its own by charging from the grid on low overnight rates and discharging during expensive peak hours. Adding solar increases the benefit further by also storing free daytime generation. EPC can install both together as a complete system.
Which tariffs work best with Powerwall?
Octopus Go and Octopus Intelligent are currently the most popular for consistent home battery savings. Octopus Agile can deliver lower effective rates with more flexibility. EPC will recommend the right option for your usage and configure your system accordingly.
What certifications does EPC hold?
EPC holds MCS certification, Tesla Powerwall certification and Trustmark registration. These are the credentials that matter for a battery installation and we hold all of them on every job we complete.
Is finance available?
Yes. EPC offers flexible finance including 0% options, meaning for many households the monthly saving covers the repayment and the installation is cash-flow positive from month one.
Will it keep my home powered through a blackout?
Yes. Powerwall if installed with a gateway detects grid outages and switches to battery power in under 20ms, fast enough that most appliances will not notice the transition. Your home keeps running on stored energy with no action needed from you.
How much could I realistically save?
Savings depend on your usage, tariff and whether you have solar. Households combining a low-rate overnight tariff with Powerwall typically see £600 to £1,200 per year. EPC will give you a realistic figure for your specific home, not a headline estimate.
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EPC Improvements Ltd is a credit broker not a lender. We are authorised and regulated by the Financial Conduct Authority (firm reference number: 781156). We do not provide financial advice but offer credit products from Zopa Bank Limited, a lender authorised and regulated by the Financial Conduct Authority under firm reference number 800542. We do not charge customers a fee or earn a commission for our credit broking services. Credit is subject to age, status, and affordability. Borrowing more than you can afford or paying late may affect your financial status and ability to obtain credit. You are not obligated to use the lender we suggest. You are free at any time to explore and secure financing independently, and it is possible that you may find a better offer elsewhere.