TESY

Buy Tesy water heaters online with 0% VAT

You can get a Tesy hot water storage tank from PVundSO with 0% VAT, making it significantly cheaper than in traditional retail stores . This tax advantage applies to the entire hot water solution, from the integrated storage tank to the heat pump unit. This reduces your purchase costs without compromising on quality from an established brand manufacturer.

At the heart of the product range is the Tesy Aquathermica Pro, a domestic hot water heat pump with a storage capacity of 200 or 260 liters. Unlike a simple Tesy boiler, which heats the water purely electrically, this unit combines storage and heating technology in a single housing . The integrated heat exchanger can optionally connect a second heat source, such as your existing heating system, making the system future-proof. You can set the temperature and operating mode on the control panel to suit your daily routine.

Purchases from us are not made through an anonymous call center, but directly from experienced electrical engineers . Shipping is available throughout Germany and is free for orders over €100. If you live in the region, you can also pick up your Tesy water heater directly from our station in Hildesheim.

Efficient hot water preparation with the Tesy domestic hot water heat pump

The Tesy domestic hot water heat pump extracts most of its energy from the ambient air and requires very little electricity . It works essentially like a reverse refrigerator, extracting heat from the air and transferring it to the water in the storage tank. Approximately 0,48 kilowatts of electrical power are used to generate about 2,6 kilowatts of heat.

This is precisely what distinguishes a heat pump from a purely electric water heater. A Tesy heat pump for hot water significantly reduces operating costs compared to an immersion heater or instantaneous water heater because a large portion of the energy is extracted from the air free of charge. Over the course of a year, this adds up to a considerably lower electricity bill. Once heated, the water remains usable for many hours in the well-insulated Tesy hot water storage tank.

You also have flexibility regarding the installation location. You can operate the unit in the basement, laundry room, or utility room, where it can also utilize the waste heat from other appliances. The only important factor is adequate ventilation, as the heat pump extracts a significant amount of heat from the ambient air. If you'd like to take a broader approach, a photovoltaic system with an immersion heater would be a sensible addition to the concept.

Here's how to use solar power for hot water throughout your house

Using self-generated solar power makes hot water preparation even cheaper. If the heat pump runs during the day while your photovoltaic system is generating electricity, it heats the water almost free of charge . The filled Tesy hot water storage tank keeps this solar energy available until the evening.

To ensure this works reliably, it's worth looking at the energy source. A solar thermal system for hot water provides the necessary energy. A Tesy heat pump for hot water integrates seamlessly into this system and converts inexpensive solar power directly into usable heat.

In practice, the combination of photovoltaics and a heat pump significantly increases self-consumption, often to well over half of the generated electricity. Instead of feeding energy into the grid for just a few cents, you use it to heat water for showers, baths, and kitchens. This increases the overall efficiency of the system and noticeably eases the burden on your household budget. With an additional battery storage system , you can even use surplus energy long after the sun has set.

Finding the right storage size of 200 to 260 liters

The appropriate storage tank size depends primarily on the number of people in the household. As a rough rule of thumb, you should allow for 30 to 50 liters of hot water per person per day . This will determine whether the 200-liter version is sufficient or the 260-liter version is a better fit.

The following overview will help you with the initial classification:

storage volume	household size	Typical use
200 liters	2 to 3 persons	Bathroom and kitchen in everyday life
260 liters	4 to 5 persons	Family with higher consumption

If in doubt, choose a slightly larger tank, as a well-filled storage tank bridges periods of low sunlight better and requires less frequent reheating. Tesy hot water storage tank tests and practical reports confirm that a tank that is too small reaches its limits more quickly and requires electric reheating sooner on cloudy days.

An undersized storage tank forces the heat pump to cycle more frequently, increasing electricity consumption. The integrated storage tank acts as a buffer tank, smoothly balancing peak demand . It's best to plan for a suitable installation space and the necessary connection accessories right from the start.

Advice on the Tesy hot water storage tank from an electrical engineer

Before purchasing a Tesy hot water storage tank, PVundSO's qualified electrical engineers will advise you personally. They are familiar with the requirements for installation location, connection, and integration from numerous completed projects. This way, you'll find the model that truly suits your household and your photovoltaic system. Even before you order, we'll clarify whether your installation space offers sufficient ventilation and how to connect it to your system.

When it comes to the question of how to optimally combine a heat pump, storage tank, and solar power, expert advice is more helpful than any product description. Tesy hot water storage tank experience from numerous installations is directly incorporated into our recommendations . For a quick overview of the most important requirements, use our PV system checklist.

We won't leave you on your own after your purchase. If you have any questions about setup, settings, or maintenance, you can reach us by phone, WhatsApp, or in person in Hildesheim. This after-sales support is what sets a specialist retailer apart from a purely online retailer.