Can a telco cut its energy bill in half?

The cheapest megawatt-hour is the one you never use.

1. Sleep modes. Radio network equipment powers down when traffic drops.
2. Machine learning. Smarter sleep modes predict when cells can rest.
3. Hardware upgrades. Newer network equipment does more per watt.

Yet the network carries far more data for a similar energy bill, and 6G and data centres keep adding demand. Net efficiency gains are limited. The bigger win is energy cost efficiency.

Connections sized for a state-owned past, still paid for today.

A large telco runs thousands of grid connections, each billed on its own. Many were sized long ago, and some were never on record: nobody tracked them when telcos and grid operators were one state-owned company.

Let grid tariffs decide where you build.

Every new tower, data centre or battery locks in a grid regime for ten years or more.

• €400 → €5,000a year in grid charges for the same small site, depending on where it connects
• €15 to 41kper MW a year for large sites, between Dutch grid operators
• €30 to 82ka year for a 2 MW data centre, depending on where it connects

Large batteries are resilience that pays for itself.

Deutsche Telekom is building 300 MWh of battery storage across its German sites, for three reasons: backup for data centres and critical sites in place of diesel, market participation through arbitrage, balancing and frequency services, and cheaper renewables by storing PPA power for when it is needed.

Site steering: tariff design drives flex returns.

1. Every site, its own tariff. Each backup battery is steered around its own site's grid tariff and power prices.
2. Savings on your own bill. Behind the meter: lower grid and energy costs, with a resilience reserve always kept.
3. Not a VPP. A VPP pools batteries to sell services to the grid. Site steering optimises each site first, and the two can stack.

Suppliers charge a premium for risk they can't price.

1. Forecast. Predict your own consumption better than the supplier can.
2. Nominate. Send your own forecast to the supplier instead of its default profile.
3. Pay less for the gap. Smaller deviations mean lower imbalance fees or TSO charges.

Same strategy, two very different years.

Moving step by step from pure spot to layered hedging with more renewables lowers the commodity cost in a normal year, and even more in a volatile one.