- Storing electricity is becoming a strategic priority for industrial companies with high heat demand
- Thermal storage systems make it possible to use low-cost solar or grid electricity specifically for heat supply
- Power-to-heat solutions help replace natural gas and reduce CO2 emissions
- Storage decouples electricity generation and consumption over time, making fluctuating renewable energy usable
The energy transition comes with a paradox: During periods of high solar and wind power production, electricity is abundant—yet many industrial processes still rely on fossil gas for heat generation. The problem: Without sufficient storage capacity, surplus electricity from solar or wind sources often goes unused. And yet, there is a simple and economically attractive solution—storing electricity as heat.
Storing electricity – not just with batteries
In public debate, “storing electricity” is often equated with battery solutions. But for industrial companies with high heat demand, there’s a far more efficient alternative: power-to-heat systems with thermal energy storage – such as the ThermalBattery™ by ENERGYNEST.
Unlike conventional batteries, this is a modular thermal storage system that stores electricity in the form of heat. These units convert low-cost electricity – for example, from an on-site solar installation – into heat and store it with minimal losses. This stored heat remains available even when the sun isn’t shining or electricity is needed elsewhere.
Thermal storage: A key to industrial decarbonization
One thing is clear: the ability to store electricity as heat lays the foundation for fossil-free heat supply. Many industrial processes require high temperatures that are still generated using fossil gas. By combining renewable electricity, power-to-heat technology, and thermal storage, companies can take a strategic approach to electrifying their heat supply – and remain flexible in the process.
Store solar power, replace fossil fuels
Storing electricity is particularly cost-effective when the power comes from a company’s own photovoltaic system. Using solar electricity directly for heat generation reduces dependency on gas imports and protects against rising CO2 costs. At the same time, using self-generated electricity can lower grid charges. In this context, thermal storage proves to be an economical, durable, and low-maintenance solution.
Storing electricity for industrial process heat – how it works
How does this work in practice? Power-to-heat systems typically consist of an electric heating element that converts electricity into heat, and a storage unit that makes the heat available when needed. These systems are modular and scalable, allowing them to be tailored to the needs of various industries. Whether for drying processes, steam generation, or heating production facilities – storing electricity as heat is not only technically feasible but also economically attractive in many applications.
Avoiding peak loads by storing electricity
Another advantage: thermal storage supports load management. By charging the storage system during periods of low electricity prices or high in-house solar generation, companies can avoid peak loads. This reduces energy costs and eases the strain on the power grid. It also enables companies to actively participate in a more flexible energy system and benefit from regulatory incentives, such as exemptions from certain levies.
Those who can store electricity gain flexibility
In an era of volatile energy markets and rising CO2 costs, the ability to store electricity economically and flexibly is a clear competitive edge. Power-to-heat with thermal storage is an especially efficient solution for industrial companies with high heat demand. It enables them to store solar electricity, replace fossil gas, and secure a future-ready energy supply.
Companies that invest in storage solutions today gain more than just supply security – they also strengthen their climate performance and cost control.
