How the tepeo ZEB boiler uses off-peak electricity to heat your home
Electric heating doesn’t have to mean using electricity at the most expensive times of day. Some systems can take advantage of cheaper off-peak rates, storing heat in advance so it’s ready when your home needs it.
This is where the tepeo ZEB boiler comes into its own. It works like a heat battery, charging during lower-cost periods and storing heat for later. For homeowners looking to move away from fossil fuel heating, the ZEB offers a more flexible, low-carbon way to heat the home while making better use of smart energy tariffs.
With that in mind, let’s look at how the tepeo ZEB works and how smart charging can help reduce running costs.
How does a ZEB boiler work?
As we touched on earlier, the tepeo ZEB works differently from a standard electric boiler. Instead of using electricity only when your thermostat calls for heat, it stores heat in advance using a built-in heat battery.
Inside the unit, electricity heats a high-density ceramic core. The core holds that heat until your home needs it, then releases it into your wet central heating system (including your radiators). Smart controls manage how much heat is stored, so the ZEB can make better use of lower-cost electricity periods.
That built-in storage is what sets the ZEB apart. It’s still an electric heating system, but it gives homeowners more flexibility over when they use electricity to heat their home.
How the tepeo ZEB uses cheaper electricity
Off-peak electricity is usually cheaper when demand on the grid is lower, often overnight. Some smart tariffs also offer lower-cost periods during the day. For electric heating, those cheaper windows can make a real difference, but only when the system can store heat for later.
That’s where the tepeo ZEB works differently from a standard electric boiler. It charges during lower-cost periods and stores heat inside its core, ready to release when your home needs warmth.
Smart charging makes this more efficient. Instead of relying on a basic timer, the ZEB plans ahead based on your heating needs, the weather, your tariff, and the heat already stored in the unit. This helps it charge at the times that make the most sense for your home
How is the ZEB different from a standard electric boiler?
We’ve already covered how the ZEB stores heat and uses smart charging to make better use of cheaper electricity. But when you compare it directly with a standard electric boiler, the difference becomes clearer:
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In short, the ZEB isn’t simply a like-for-like electric replacement for a gas boiler. Its main advantage is that it can shift heating demand to lower-cost periods, giving your home more control over when electricity is used.
Is a tepeo ZEB boiler right for your home?
The tepeo ZEB may be a good fit if you want to move away from gas, oil, or LPG and your home already has a suitable wet central heating system. It can also work well in properties where an external unit, such as a heat pump, would be difficult to install or simply isn’t the preferred option.
The system is usually best suited to homes that are reasonably well insulated and can make use of off-peak electricity through a smart meter and time-of-use tariff. This gives the ZEB more opportunity to charge when electricity is cheaper and use stored heat later in the day.
However, the ZEB won’t be the right fit for every property. Homes with high heat demand, poor insulation, or limited access to cheaper off-peak electricity may see fewer benefits.
That’s why a home assessment is the best next step. Every home is different, and the right heating setup depends on how well your property holds heat, how your existing system is configured, and when you can access lower-cost electricity. An assessment gives you a clearer picture of how the ZEB would perform in practice, including what your running costs could look like before you make any decisions.
Can the ZEB boiler work with solar panels?
Yes. The tepeo ZEB can work well for homes with solar panels, especially because it stores heat for later use.
Solar panels generate electricity during daylight hours, but many homes need the most heating in the morning and evening. This can create a gap between when solar power is produced and when heat is needed, particularly in winter when days are shorter.
The ZEB helps bridge that gap by using electricity to charge its heat store in advance. Your home can then use that stored heat later in the day, when you need warmth but your panels may no longer be generating much electricity.
For some households, solar panels can help reduce daytime grid usage, while off-peak electricity can support overnight charging when rates are lower. The exact savings will depend on your solar output, tariff, and how your home uses heat.
Thinking about a tepeo ZEB boiler?
The tepeo ZEB gives homeowners a smarter way to move away from fossil fuel heating without relying on electricity at the most expensive times of day. Instead of heating your home on demand like a standard electric boiler, it stores heat when electricity is cheaper and releases it when you need it.
This can make electric heating feel more manageable for homes that are already well suited to the system. Properties that hold heat well and can access cheaper off-peak electricity are likely to see the clearest benefits.
SGS Energy is an approved installer of the tepeo ZEB. We’ll assess your home, current heating setup, and insulation to give you a clearer idea of how the system would work in practice before you make a decision.
Book your free consultation today to find out if the tepeo ZEB is the right fit for your home.
FAQs
What is a ZEB boiler?
A ZEB boiler is an electric heat battery boiler made by tepeo. It stores heat in a ceramic core, then releases that heat into your central heating system when needed.
Is the tepeo ZEB the same as an electric boiler?
No. A standard electric boiler uses electricity when you need heat. The tepeo ZEB stores heat in advance, which means it can charge during cheaper off-peak electricity periods.
Does the ZEB boiler work with radiators?
Yes. The tepeo ZEB boiler is designed to deliver heat into a wet central heating system, similar to a traditional boiler.
Does the tepeo ZEB need a smart tariff?
The ZEB can work without a smart tariff, but smart tariffs are where it becomes more cost-effective. Time-of-use tariffs allow the ZEB to charge when electricity is cheaper.
Can a tepeo ZEB replace a gas boiler?
In some homes, yes. The ZEB may be a suitable replacement for a gas, oil, LPG, or electric boiler. Suitability depends on your home’s heat demand, insulation, hot water setup, and tariff options.
Is the ZEB boiler cheaper to run than gas?
It depends. The tepeo ZEB is designed to use cheaper off-peak electricity, which can help keep running costs closer to gas. The actual cost depends on your tariff, property, and heating usage.
