Tesvolt launches new C&I battery storage system with 15 year performance guarantee

With two cycles per day, the Forton can be loaded without voiding its 15-year performance guarantee. That opens the possibility of trading on the electricity market, enabling companies to recoup their investment more quickly.
The Tesvolt Forton is the company's first to use high-temperature LFP cells that do not require liquid cooling and have a particularly long guaranteed service life. | Image: Tesvolt

German commercial battery maker Tesvolt developed its new Forton system to accommodate the fact businesses which can operate their batteries for two full cycles daily are likely to realize faster financial benefits from the systems.

With Forton supplied with a 15-year performance guarantee, the two-cycle option opens up energy trading, to boost battery revenue.

The new product is available in 30 kW/92 kWh increments. Four can be cascaded behind one inverter and up to 16 inverters can be connected in parallel for a maximum scale of 250 kW/1.5 MWh

Sophisticated battery management, which enables cells to be charged as gently as possible, backs the long performance guarantee, according to Tesvolt. The 15-year period also includes 11,000 cycles.

“We’re deliberately talking about an economic miracle,” said Simon Schandert, co-founder and chief technology officer of Tesvolt AG. “Never before has a commercial storage system been operated so economically. Technically, this is only possible with a battery storage system that’s highly resilient, meaning it can be charged and discharged several times a day for many years.”

The manufacturer, via spin-off company Tesvolt Energy, offers a trading platform for the direct marketing of its commercial storage system services. Tesvolt said prohibitive fees have previously prevented small-scale commercial batteries from participating in energy markets via other trading platforms. Tesvolt Energy requires only a grid connection of at least 50 kW.

The Forton battery features high-temperature-resistant lithium ferro-phosphate (LFP) cells which do not require additional liquid cooling. It can be used outside and features safety systems including smoke, heat, and gas sensors, and an aerosol extinguishing system.

From pv magazine Deutschland.

Written by

  • Covering online news on the German market and editing the German print issue since 2021, Marian has been writing about power electronics for pv magazine’s global website and monthly print magazine since 2018.

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Patrick Oscar
Mar 28, 2025
Very interesting
Maxime J
Mar 27, 2025
Total system scale energy/power seems wrong compared to 16 inverters * 4 batteries per inverter, could you check and/or share sources ?

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