Photo of the Bolt e-boiler mounted on a wall

Meet the revolutionary Bolt battery-boosted e-boiler

  • Compact

    Fits into tight spaces and connects simply to existing pipework.

  • Powerful

    Battery power boost delivers on-demand, high-pressure hot water, flow-rate equivalent to 34KW.

  • Sustainable

    Charge with a dedicated solar panel for 100% fossil-free heating and hot water.

Are you ready for Bolt?

  • Install in as little as half a day
  • No need to upgrade radiators or pipework
  • Choose from a range of power combinations
Photo of a man holding a dog while stood next to a Bolt e-boiler

The first plug and play e-boiler

Unlimited on-demand hot water - no tank needed

Line up of 3 Bolt E-Boilers

Don't have space for a heat pump and tank? Or maybe you've been advised you'd need costly radiator replacements and pipe upgrades to switch over. Either way, Bolt is for you. Bolt delivers fossil-free, sustainable heating and hot water, powered by both solar and grid energy.


Dedicated solar option for unbeatable energy efficiency

If you’ve switched to a renewable-only energy supplier, your Bolt boiler will already provide you with fossil-free heating and hot water, without any compromise on space or noise.

Bolt e-boiler and solar panel

If you’d like to do even more for sustainability, there’s always the option of adding a dedicated solar panel to your Bolt setup, so you can save on your bills as well as save the planet.

By connecting directly to your Bolt battery’s DC input, a dedicated panel delivers power 20% more efficiently than a separate solar system with an AC inverter – which you have to admit is pretty cool. And hot, too -- when it comes to your water and heating.

Flexible and future proof

Combine battery, solar, or power purely from your home supply for a system that adapts to your family and budget.

Product photo of the Bolt E-Boiler, batteries and solar panel

Connect a dedicated solar panel directly to your Bolt system for ultra-efficient DC charging with no need for an inverter, or charge your Bolt battery with low-cost, off peak energy. However you power it, your Bolt battery delivers the extra power-boost you need for continuous, high-pressure hot water whenever you need it.

Proudly part of the Electric Combi Boilers Co.

Bolt is 100% designed & manufactured in the United Kingdom.

Got questions?

You'll find the answers to most of the queries people bring to us here - as well as a few that they don't. From connecting Bolt to an existing solar setup, to energy use, to configuration and installation, we've got it covered.

Photo of a girl playing with her toys alongside a wall-mounted Bolt e-boiler