Questions & Answers

1. General information about TESVOLT

What exactly does TESVOLT do?

TESVOLT offers powerful battery storage solutions for industry and commerce, enabling a secure, economical and sustainable energy supply.

What distinguishes TESVOLT from other manufacturers?

TESVOLT combines technological excellence with genuine cost-effectiveness. Our storage systems are durable, scalable and designed for maximum safety – developed and manufactured in Germany.

How does TESVOLT contribute to the energy transition?

With over 6,000 projects completed worldwide, we make electricity from renewable energies available around the clock. In this way, we are actively promoting independence from fossil fuels.

2. Purchase & Installation

Can I buy TESVOLT storage directly?

Our storage systems are distributed and commissioned by certified TESVOLT partners. Our partners support end users of the storage solution from planning to commissioning and ensure the highest quality and safety standards.

How can I find a TESVOLT partner near me?

You can quickly find a qualified installation company in your region via our area manager.
Find a contact person now

What does TESVOLT specialist or brand partner mean?

TESVOLT partners are specially trained specialist companies that are authorised to install and maintain our storage systems. As part of a partner programme, they go through various stages and benefit from extended warranties, service access and attractive participation models.

How does the installation of a TESVOLT storage system work?

After planning and selecting the right system, your specialist partner will take care of the installation. TESVOLT provides support with preconfigured technology, tested components and personalised assistance.

3. Products & Applications

What is a TESVOLT storage system suitable for?

TESVOLT storage systems optimise self-consumption, reduce energy costs, increase independence from the grid and enable participation in electricity trading on energy exchanges. They can be used in PV systems, charging infrastructure, commercial or industrial applications – right up to large battery parks.

More about the possible applications

How can I combine my PV system with a storage unit?

A TESVOLT storage unit stores excess solar power and makes it available exactly when you need it – even at night or when the sky is overcast. This allows you to use up to 80% of the electricity you generate yourself and reduce expensive grid purchases.

Can I retrofit my existing PV system with a storage unit?

Yes. TESVOLT storage systems can be flexibly integrated into existing PV systems – this is particularly attractive if your feed-in tariff is expiring or you want more independence.

How secure are TESVOLT storage systems?

Our systems are TÜV-certified and secured with multiple redundancies – depending on the area of application, they feature active cell monitoring, extinguishing systems or even their own fire protection architecture.

4. Service & Support

Who can I contact if I have any questions?

Our support team is available by telephone or email – fast, friendly and solution-oriented.

Get in touch

What guarantees does TESVOLT offer?

Depending on the product, TESVOLT offers up to a 10-year system and capacity guarantee – for maximum investment security.

How quickly will I receive support as an end user?

Our service partners usually respond within one working day.

How long will spare parts be available?

We guarantee spare part availability for many years and rely on durable components with verified supply chains.

Questions about the A-series products

Why was the A-series removed from the portfolio? (TS 48 V, TS HV 70, TS-I HV 80)

TESVOLT stands for innovation and the highest quality standards. The A-series products were discontinued because we are constantly striving to offer you the most modern and efficient solutions.

Thanks to technological progress and intensive development work, we can now present you the TESVOLT FORTON , a new generation of storage systems that is even more efficient, durable and powerful.

Our aim is to remain at the cutting edge of innovation and to offer you products that ensure the long-term value and trust you place in TESVOLT. With this further development, we are setting standards for the future of energy storage - and remain your reliable partner for advanced solutions.

How long are the A-Series products available?

The A-series systems are sold out and therefore no longer available.

How long will support for the A-Series products be available?

We guarantee continued support for the products: Our support for the TS 48 V, TS HV 70 and TS-I HV 80 products will be available to you beyond the end of sale for the entire duration of the warranty (5-year system warranty and 10-year capacity warranty). With our support, we ensure that you have a smooth transition phase if you want to switch to our new, high-performance products.

Can I have the TS 48 V, TS HV 70 or the TS-I HV 80 repaired even after the order stop?

Yes, our service for the A-series will continue even after the order stop. Repairs are carried out under the terms of the warranty so that you can continue to utilise the full potential of your investment and long-term safety is guaranteed.

Is it possible to extend existing A-series storage systems with additional battery modules, and if so, for how long?

No, existing systems can no longer be extended with battery modules, as the A series and all corresponding battery modules are sold out.

Can I expand my A-series storage system even if the battery modules are no longer available?

Yes, this is possible for battery storage systems that are operated with our TESVOLT Energy Manager. These include the TS HV 70 and TS-I HV 80, which can be expanded in terms of energy and power using systems from our E series, or a TESVOLT FORTON system. They are then "grouped" and centrally controlled by the TESVOLT Energy Manager. Software version 3.0 is required.

You can find more information about the TESVOLT Energy Manager here .

5. Training & Partnership

How do I become a TESVOLT partner?

Simply register, take part in a certification training course and become an official TESVOLT partner. You will then benefit from many advantages – from marketing support to exclusive projects.

Become a partner now

What is the TESVOLT Online Academy?

Our digital learning platform provides specialist knowledge on energy storage, installation and marketing – accessible at any time and practical.

What are the benefits of the TESVOLT partner programme?

Partners receive special discounts, access to exclusive training courses, projects, additional guarantees and revenue sharing in electricity marketing.

Frequently asked questions about the E-series

Why is the E series being discontinued?

TESVOLT stands for innovation and the highest quality standards. Thanks to technological advances and sustainable developments, we are currently introducing a new generation of storage systems that are even more efficient, durable and powerful.

Our goal is to stay at the cutting edge of innovation and offer you products that secure the value and trust you place in TESVOLT in the long term. With this further development, we are setting standards for the future of energy storage – and remain your reliable partner for advanced solutions.

Which E-series systems are affected?

All E-series systems are being phased out, or have already been discontinued.

Cabinet products:

  • TS HV 70 E
  • TS-I HV 80/100 E
  • TS HV 30-80 E
  • TS HV 50 E Hybrid

Container products:

  • TPS HV 50/80 E
  • TPS E
  • TPS flex E
  • TMS flex R/C
How long will E-series systems be available?

TS-I HV 80/100 E, TS HV 30–80 E, TS HV 50 E Hybrid and TMS flex R/C:
Existing quotes can be converted into orders until approximately June 30, 2026 (subject to availability). Creating new quotes via the configurator has no longer been possible since April 30, 2026. Please contact your responsible Area Manager if you need support in selecting suitable alternative offers.

TPS HV 50/80 E, TPS E, TPS flex E and TS HV 70 E:
These systems are no longer available as complete systems.

Will support for the E-series continue?

We guarantee continued support for the products: Our support for E-series products will be available to you beyond the end of sales for the entire duration of the warranty (5 or 10-year system warranty and 10-year capacity warranty). With our support, we will ensure that you have a smooth transition if you wish to switch to our new, powerful products.

Can I still have E-series products repaired or serviced after orders have been discontinued

Yes, our service for our E-series systems will continue even after orders have been discontinued. Repairs will be carried out in accordance with the warranty conditions so that you can continue to utilise the full potential of your investment and long-term security is guaranteed.

Is it still possible to retrofit additional battery modules, and if so, for how long?

The easy retrofitting of complete strings for our standard products with a DC-combiner is expected to remain possible until 30 June 2026, depending on available stock. Within a string, retrofitting is only permitted within 6 months of commissioning.

You can find information on how to easily expand existing systems in our flyer .

Can I expand E-series battery storage systems even if the battery modules are no longer available? 

Yes, this is possible if the system is operated with our TESVOLT Energy Manager. These systems can be expanded in terms of energy and power using our TESVOLT FORTON or TESVOLT TAYTAN . They are then ‘grouped’ and centrally controlled by the TESVOLT Energy Manager. Software version 3.2 of the TESVOLT Energy Manager is required.

You can find more information about the TESVOLT Energy Manager here .

For the TS HV 30-80 E product series, expansion using TESVOLT TAYTAN and TESVOLT FORTON is also possible when using the SMA energy management system.

What alternatives are there to the E-series products?

Our stackable TESVOLT TAYTAN solution, safely manufactured in Germany, offers you the highest safety standards, high performance and a wide range of installation options. Home or commercial use, indoor or covered outdoor installation and a large number of configuration sizes allow for maximum flexibility. Combined with classic applications such as self-consumption optimisation, peak load capping or multi-use, the TESVOLT TAYTAN is the ideal alternative to our standard E-series products.


Our TESVOLT FORTON is our new ‘outdoor economic miracle’ and offers you flexible, future-proof solutions for trade and industry. With classic applications such as self-consumption optimisation, peak load capping or the use of dynamic electricity tariffs, the TESVOLT FORTON offers a very good alternative to the standard products and container solutions of the E-series thanks to its high efficiency and flexibility. In combination with our intelligent trading software from TESVOLT ENERGY, the TESVOLT FORTON also enables profitable access to energy trading.


Our TESVOL TALLON battery container is the ideal solution for electricity trading, control power or grid stability – powerful, safe and economical. Whether as a stand-alone battery park connected to the grid, for peak load capping in industry and commerce, or as part of a hybrid power plant – our system adapts flexibly to any application. An excellent alternative to the largest E-series container solutions.

Where can I find the product documentation in case I need it?

Data sheets, brochures and manufacturer warranties can be found as PDF files on the Service > Downloads page .

Technical documents such as installation and operating manual arre available in the TESVOLT Partner Portal .

Are you a TESVOLT partner?