Power Tariffs and Home Batteries

Where a grid company applies an effektavgift (peak-based network charge), the customer is billed on a metered value at the connection point. A battery behind that meter can cut the bill by discharging when the customer’s own import would otherwise set a high value. This page covers what that is worth and how it competes with other uses of the same battery; the full set of price-signal conflicts is on The Signal Stack — Price Signal Collisions at the Customer DER and the tariff reform on Swedish DSO Tariff Reform — Three Parallel Tracks (2025–2027).

What the meter bills

• Traditional network tariffs have a fixed charge, a charge for subscribed power and an energy charge; for customers using about 50,000 kWh a year or less the subscribed power is usually replaced by a fuse charge that depends on the size of the main fuse (Source - Energiforsk 2026-1197 Konkurrensen om Efterfrågeflexibilitet Simulering (2026)).
• Peak-based variants differ. One Karlstad study describes a DSO that, from February 2025, takes the hourly average of imported power, halves values between 22:00 and 06:00, averages the three highest values in the month and multiplies by a charge per kW (Source - Swedish Household PV-BESS Studies (Rinio 2025, Ollas et al 2026)); Ellevio used a similar model for small customers from 1 January 2025 before deciding to drop it from 1 June 2026.
• The requirement that all DSOs introduce a time-differentiated effektavgift by 1 January 2027 is being repealed, and Ei is due to present a proposal for a new model in April 2027; grid companies may keep existing charges (Elnätsavgift — What Determines Your Bill).

What controlling the connection point means

The controller keeps the metered import below a threshold by discharging the battery when load rises. Fiedler and Coll Matas modelled a strategy that forecasts peaks and prices, which the authors say is not yet fully in available products (Source - Fiedler Holiday Homes PV Battery Demand Charges (2022)), and Rinio notes that peak shaving would need some kind of intelligent forecasting (Source - Swedish Household PV-BESS Studies (Rinio 2025, Ollas et al 2026)). A vendor claim from GreenVoltis says its connection is managed so the power tariff “lands on only half of the installed battery power”, with no mechanism explained (Source - GreenVoltis Single-Day Revenue Claim and Mimer Check (2026)).

What the evidence says it is worth

In the Energiforsk simulation the battery was used mainly for ancillary services and the network charge, and the spot market “went without”: about SEK 11,000 of the roughly SEK 11,800 a year came from ancillary services, about 800 from the network charge and about 50 from spot. Without ancillary-service revenue the battery used its capacity on spot (about SEK 1,400) and the network charge fell only about SEK 50 more. The saving levelled off because the flatter the import, the more battery capacity is needed for each further reduction (Source - Energiforsk 2026-1197 Konkurrensen om Efterfrågeflexibilitet Simulering (2026)). A battery that delivers FCR-D up must also recharge afterwards, which can land in the measurement window (The Signal Stack — Price Signal Collisions at the Customer DER).

The connection side

• Svensk Solenergi says grid companies often size connections for a battery’s maximum charging and maximum discharging at once, which stops connections until reinforcement; it wants standardised conditional connection forms and symmetric, time-differentiated tariffs published in machine-readable form (Source - Svensk Solenergi Remissvar Elmarknadsutredningen (2025)). These are the association’s claims. Svk’s pre-study on conditional connection is the transmission-level counterpart (Source - Svk Villkorade Anslutningsavtal Förstudie (2025)); see also Flexible Connection Agreements.
• Gotland’s smart meters have a port for external equipment that gives real-time data every 10 seconds, and its Kräklingbo pilot tests prices per secondary substation in 30-minute steps (Source - Energicentrum Gotland Dynamic Pricing and Tariff 2.0 (2025)). The pilot’s final report found that the day-ahead local signals missed the most critical load hours, that pilots gained more from spot-linked flexibility than from the local price, that only two of ten pilots had batteries (not controlled by the signal), and that all respondents preferred a continuous need-based signal to peak-based effekttariffer (Source - Energicentrum Gotland Tariff 2.0 Slutrapport (2026)).

Data gaps

• How a Swedish DSO limits a customer battery at the connection point in practice (main fuse or subscription, import versus export, treatment as production or consumption, who may control it); a DSO connection-terms document is needed

Related pages

• The Signal Stack — Price Signal Collisions at the Customer DER, Swedish DSO Tariff Reform — Three Parallel Tracks (2025–2027), Elnätsavgift — What Determines Your Bill
• Energy Storage, Aggregation, The Swedish BESS Business Case — Revenue Stacking and the FCR Saturation Problem, Flexible Connection Agreements