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title: "Prevent grid pollution with stable thermal storage from my-PV"
description: "Choose the cost-effective alternative to a battery. Store excess power without wifi interference in the boiler tank and lower the energy bill directly."
type: information-resource

---

# ESTG

![MyPV dedicated](https://a.storyblok.com/f/288569/2000x2000/d4c4d3e63a/mypv-dedicated.png)

[In the first part of this blog](/information-resources/blog/how-my-pv-sets-the-new-standard-for-thermal-storage) we discussed how my-PV converts excess power into heat. To optimize this process, the underlying technology is crucial. Many traditional controllers on the market use phase angle control via a thyristor or triac to regulate power. This works like a classic wall dimmer: the technology chops a piece out of the clean sine wave of the alternating current every time.

This abrupt chopping into the sine wave causes major practical difficulties. It causes harmonic distortion and high-frequency interference on the electricity grid. As a result, the power cables act like an antenna, which can concretely lead to the end customer's wifi signal dropping or becoming disrupted. Moreover, sensitive electronic devices in the home can overheat or malfunction due to this grid pollution. The systems from my-PV deliberately do not use this outdated technology. The devices deliver a stable, clean operation without grid pollution, keeping the electronics in the home fully protected.

## Hot water as a cost-effective battery

The discussion about energy storage is often about choosing between a 5 kWh or 10 kWh home battery. For the installer it is important to know that this step up easily carries an additional price of 1600 euros. With a boiler tank, the proportions are very different: expanding the storage capacity from 150 liters to 200 liters or 300 liters costs only a few hundred euros. A hot water boiler therefore functions as an extremely cost-effective thermal battery.

This offers a direct solution to the ongoing uncertainty in the energy market. With concerns from Gasunie about filling gas storage facilities and tensions around international transport routes, the gas price remains an unpredictable factor. By switching to thermal storage, the installer helps customers to become less dependent on gas or biomass directly.

## Concrete payback periods in practice

The investment in a system like the AC ELWA 2 starts from around 1000 euros. The exact payback period in practice is directly linked to the hot water that a household consumes:

- savings for 2 people: a modest household achieves a net saving of approximately 120 euros per year, with a payback period of 8.3 years
- savings for 4 people: an average household with normal shower use saves a net amount of around 270 euros per year, meaning the investment is earned back in 3.7 years
- savings for bath lovers: families who regularly use the bath save a net amount of up to 300 euros per year and achieve a fast payback period of just 3.3 years

With these figures, you as an installer offer a powerful and tangible argument during every advisory meeting. You deliver a stable energy system that lowers the customer's energy bill directly, without any risk of interference in the home installation.

Do you want to check the current availability of the AC ELWA 2 and the AC•THOR for your upcoming projects? Log in to our platform and plan your stock directly.

- [Order directly](/en-gb/brands/my-pv)