Understanding Capacity-Based Network Fees

Traditional network fees were mostly based on:

• ●Total energy consumed (kWh)
• ●Fixed annual charges

Capacity-based network fees add a new dimension:

• ●Charges are partly based on how much power (kW) you draw at your highest moments

The electricity grid must be built to handle peak demand, not average demand.

The core problem:

• ●Peak usage occurs during short periods
• ●Grid infrastructure must be sized for these rare but extreme moments
• ●Reinforcing the grid is expensive and slow

At the same time:

• ●More households are adding batteries, EV chargers, and heat pumps
• ●These devices can draw large amounts of power simultaneously

From a grid perspective, these fees are logical and necessary.

From a household perspective, the logic can seem conflicting.

The apparent contradiction:

• ●Electricity prices are low at noon during windy periods
• ●Price arbitrage encourages buying electricity during these hours
• ●Capacity fees penalize high power draw during the same periods

This leads to a natural question:

Why should there be a limit on electricity usage when electricity is cheap and abundant?

The confusion arises because price signals and grid signals serve different purposes.

Low prices do not mean unlimited grid capacity.

The solution is not to choose between price optimization and capacity limits—but to optimize within both constraints.

Smart charging does not mean maximum charging.

A battery does not need to charge at full power to capture low prices.

• ●Charge at a controlled, moderate rate
• ●Spread charging over multiple low-price hours
• ●Avoid creating sharp peaks

Instead, it can:

Manual systems struggle with this balance.

Intelligent systems handle it automatically by:

• ●Forecasting price windows
• ●Knowing grid tariff structures
• ●Respecting user-defined power limits
• ●Optimizing battery charge rates, not just charge timing

This transforms the problem from:

“How do I charge as much as possible when prices are low?”

Into:

“How do I charge just enough, at the right speed, during the right hours?”

It is not necessary to fully charge your battery by charging at full capacity.

Benefits of price arbitrage need to be weighed against the cost of peak tariffs before deciding how much the battery should be charged.

Capacity-based fees do not remove the value of batteries.

They increase the value of intelligent control.

• ●Reduce household peak demand
• ●Smooth consumption profiles
• ●Protect against extreme spot prices
• ●Still benefit from price arbitrage—within limits

Batteries can:

Capacity-based network fees are not designed to punish flexible consumers.

They are designed to:

• ●Protect the grid
• ●Allocate costs fairly
• ●Enable more electrification without constant grid upgrades

For households, the future is not about using more electricity when it is cheap—but about using it more intelligently.

When price signals and grid signals are respected together, electricity systems become:

Cheaper

More stable

More sustainable

This is exactly where smart batteries and intelligent energy platforms deliver their greatest value.