Store hot water efficiently at home with a heat battery

Size and Capacity

The 150 model is designed with smaller households in mind, typically 1–2 bedroom homes, flats, or properties with modest hot water needs. It delivers the equivalent of about 150 litres of hot water, which is usually enough for daily showers, washing up, and general use. For families with higher demand, larger models are available, but the 150 strikes a nice balance between capacity and footprint.

Energy efficiency and savings

One of the biggest selling points is efficiency. Unlike a standard immersion heater or hot water tank, the Thermino has very low heat loss. It keeps the stored heat locked in until you use it, so you’re not paying for constant reheating. It also pairs brilliantly with renewable energy systems like solar PV or heat pumps, making it a smart choice if you’re looking to cut bills and your carbon footprint. Even if you’re just on a regular tariff, it can help you shift energy use to off-peak times, saving money while still having hot water on tap.

Installation and design

Because it doesn’t store water, the unit is smaller, lighter, and easier to install than a traditional cylinder. Plumbers appreciate that it reduces the risk of leaks and limescale issues, and homeowners love that it frees up space in cupboards or airing rooms. The design is neat, modern, and discreet, it looks more like an appliance than a tank.

Who it’s best for

The Sunamp Thermino ePlus 150 heat battery is perfect if you live in a small home, flat, or holiday let, and you want a modern, efficient alternative to a hot water cylinder. It’s especially appealing if you’re eco-conscious or looking to make your home more future-ready.