Industry
TESSA Industrial
A thermal accumulator integrated into the process. Heat is delivered as hot air, steam, thermal oil, glycol or hot water, depending on the heat exchange equipment.
Discover TESSAThermal storage
Store energy. Deliver heat at the right time.
Thermal storage solutions for industrial processes and building heating.
15 MWh in operation in Valleyfield
Why store heat
Energy is available at certain hours. Heat is needed at others.
An industrial process or a home needs heat on its own schedule. Electricity, meanwhile, is easier to access at some times of day than at others.
Thermal storage bridges that gap. It accumulates energy as heat when it is available, then delivers it when the process or the building needs it.
One day, in principle
The accumulator charges overnight. The process gets its heat during the day.
Charging
Heat delivered
Idle
Illustrative only. Actual windows depend on the site, the process and the rate.
Two product lines
Two paths. One principle.
Residential
StoQ Residential
Thermal storage built into home heating, notably alongside a heat pump.
Discover StoQHow it works
Charge, store, deliver. Three steps.
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Charge
The accumulator charges with electricity, at the hours that suit the site. Depending on the configuration, recovered heat can also contribute.
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Store
Heat is held in aluminosilicate-based solid materials, inside an insulated enclosure.
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Deliver
Heat is supplied to the process or the building in the form required, through the appropriate heat exchange equipment.
Project
15 MWh in operation. In Valleyfield, since 2025.
A 15 MWh TESSA installation is in operation at an industrial site in Valleyfield, in Quebec’s Montérégie region. It shows the technology at industrial scale, under real operating conditions.
15MWh
Storage capacity
2025
Start of operation
Applications and potential benefits
Wherever heat is needed. Assessed site by site.
Applications to assess
- DryingHot air for drying materials or products
- Process heatingHeat delivered through thermal oil, glycol or air
- Hot waterProcess or service hot water
- SteamThrough suitable integration
Potential benefits, depending on the project
- Make electrification easierIf part of the heat demand can move to electricity
- Shift consumption in timeIf the rate or the available power varies by hour
- Reduce peak power demandIf the site’s heat is already electric
- Put certain recovered heat to useIf the source qualifies on temperature, flow and continuity
Not all of these applications have been deployed to date. Benefits depend on project conditions and do not automatically add up.
Company
A technology in service. An engineering team behind it.
Tessart Energy
Tessart designs thermal accumulators and supports their integration alongside its clients’ engineering teams.
About the companyInvestors and partners
15 MWh in operation in Valleyfield, an industrial product line and a residential line.
Investor overviewLet’s talk about your heat. Your data first.
A first conversation is enough to tell whether thermal storage deserves a closer look for your site.