Summary
- FlexPower's new model combines multi-year fixed procurement with short-term electricity-market exposure.
- Physical batteries can provide peak shaving and potentially increase compute behind constrained grid connections.
- Germany's current law sets a 100% renewable-electricity accounting requirement from 2027, while draft legislation proposes moving the deadline to 2030.
FlexPower has launched an electricity-supply model for German data centres that combines long-term renewable procurement, short-term power trading and physical or virtual battery storage.
The Hamburg power trader is offering operators a configurable mix rather than a conventional full-supply contract. Part of a site’s electricity demand can be fixed for several years through power-purchase agreements and fixed-price tranches, while the remainder is sourced on shorter-term markets.
The proposition is built around both price exposure and the increasingly constrained physical power environment facing data centre developers. FlexPower says an on-site battery can shift consumption between price periods, shave peak load and reduce grid charges, while unused battery capacity can also be traded on spot markets.
At locations with limited or delayed grid connections, the company argues that storage can buffer peaks and allow more computing capacity to operate behind the same connection point. That is a more infrastructure-focused use of batteries than simply buying electricity when prices are low and selling when they rise.
Whether that translates into additional IT capacity depends on the site’s load profile, connection agreement, battery duration and the operating limits imposed by the network. Storage cannot turn a permanently undersized connection into unlimited power, but it can reduce short peaks that would otherwise determine the maximum contracted capacity.
FlexPower is also offering a virtual-battery product that replicates some of the trading behaviour of storage without installing a battery at the facility. The model buys electricity during the cheapest hour of a 24-hour period and sells in the most expensive hour as a hedge against market volatility.
The physical and financial products sit against Germany’s changing renewable-energy requirements for the sector. The Energy Efficiency Act currently provides for data centres to account for 50% renewable electricity from 2024 and 100% from 1 January 2027. In June 2026, however, the German cabinet approved draft legislation proposing to move the 100% deadline to 1 January 2030, so operators are planning against a requirement that may yet change before the 2027 date takes effect.
FlexPower says guarantees of origin used in its offer come directly from its wind and solar direct-marketing portfolio rather than being purchased separately. The practical value for a data centre customer will depend on contract structure, price, duration and how the renewable evidence aligns with the final regulatory position.
Electricity procurement has become a larger part of data centre development because power cost and power availability increasingly have to be considered together. A long-term fixed contract can improve cost predictability for a project financed over many years, but it does not by itself resolve a constrained connection or an inflexible load profile.
Battery storage creates another engineering layer. The equipment requires space, fire-safety design, connection capacity, control systems and a commercial dispatch strategy. Revenue from external electricity markets also has to be balanced against the battery’s primary role in supporting the data centre.
FlexPower is now working with partners on the possibility of including the compute load itself in power optimisation. Workloads that can be shifted in time could respond to electricity-price signals, allowing some computing demand to move away from expensive or constrained periods.
That concept is easier for batch computing and some AI training workloads than for latency-sensitive services that must run continuously. Data centre electrical demand therefore cannot be treated as uniformly flexible, particularly where customers have contracted availability or performance requirements.
The new offer reflects how power procurement is moving deeper into facility design and operations. Developers increasingly need to coordinate grid capacity, energy contracts, storage and workload behaviour rather than treating electricity as a commodity that can simply be purchased once a building is ready.
