Welcome to our Heat Battery trial

tepeo was founded in 2018 to give customers a low cost, low carbon, smart and yet simple route off of fossil fuel heating.

Since then we’ve designed, built and tested many ways to create an efficient thermal storage solution for low carbon heating – all culminating in the ZEB.

We launched the ZEB in 2021 and are focused on bringing it to more customers across the UK as we grow our network of tepeoPRO installers and in developing new solutions to help even more homes transition away from gas and oil.

tepeo is here to help millions of homeowners heat their homes, not the planet.

Electric Ireland is the retail division of ESB, which was established in 1927. Previously known as ESB Customer Supply, we rebranded to Electric Ireland in 2012. We are Ireland’s leading energy provider, supplying electricity, gas and energy services to over 1.3 million households and businesses on the island of Ireland.

You need to be a homeowner with full responsibility and authority for making changes to the heating system of your home. Your home must be suitable for the ZEB with a heating demand of <12,000kWh per year, a functioning central heating system and a suitable location for the ZEB that is accessible for delivery. You will also need to swap to Electric Ireland’s Night Boost tariff in order to join the trial. We will check eligibility during your remote survey and, if proceeding, during a home survey too. Full terms and conditions can be found here.

the trial has two stages – first we’re looking at the house types, age, heating systems and heat demand from people who sign up for a survey. This will help to understand the suitability of the ZEB for homes across Ireland. Assuming this goes well, and we have a good range of properties registered, we’ll proceed to the installation and monitoring phase. This is all about testing the installation process and running the ZEB in Irish homes using Electric Ireland’s tariffs. The data captured will allow further modelling using real world data. The results of the trial will inform how best to provide heat batteries for homes across Ireland.

We are providing a special price for trialists, starting at just €1,500 for the installation of the ZEB and standard parts and works required for installation. Outside of the trial this would cost ~€10,000. If your home needs additional work not covered in the standard scope of installation for a ZEB, our installation partner can discuss this with you & it may be possible to complete additional works, at your cost, in order to join the trial.

We are aiming to have the installations completed by 30th September 2025 and will run the trial for 12 months until 1st October 2026. This will mean the trial will be a minimum of 12 months, but will start from the date of installation until the end date. We reserve the right to extend the trial, giving you written notice if we intend to do so, in order to capture more data to ensure we can gather the insights needed.

We will provide the ZEB, delivery, ancillaries and a dedicated electrical supply for the ZEB as well as the installation, commissioning and electrical checks. We will not replace or upgrade radiators, primary pipework, hot water system or your home electrics if required for a safe, compliant installation. Wider upgrades to your heating or electrical system would be additional works undertaken at your cost if required for the install and something you wish to proceed with.

This depends on your current heating system, fuel type and heating use. This is a trial to determine if the ZEB is a good solution in the Irish market given tariffs, housing types and customer preferences for the future of residential heating. It is therefore possible your bills will increase. We will provide an estimated running cost before installation, however this is necessarily only an estimate and we cannot guarantee running costs. You should only join the trial if the risk of increased energy bills is acceptable and understood.

The ZEB and any other equipment is yours to keep! You can change tariff if there are better options available and we will stop collecting data used solely for the trial or sharing data gathered for the purpose of the trial. If you want to remove the ZEB and replace it with a different heating system, we will disconnect and remove the ZEB free of charge; however, you will be responsible for the cost of installing a new system.

You can leave the trial if circumstances mean you are unable to continue participating (moving home for example). In this case, we will remove the ZEB and associated trial equipment free of charge and you will be responsible for replacing the ZEB with a new heating system. We reserve the right to charge for ZEB removal if you wish to leave the trial for convenience.