KotiCharge
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For Housing Companies

Stop paying for
your neighbour's EV.

When EV chargers spike the building's peak power demand, the power charge bill lands on everyone — including residents who don't own a car. KotiCharge measures who caused the peak and bills them for it. Everyone else pays less.

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Problem 1 — Unfair cost sharing

EV chargers spike peak power demand. The power charge rises — and the whole building pays, including residents without a car.

Problem 2 — EV owners pay twice

EV owners already pay for their electricity usage. But through the shared power charge, they also pay for the peak they caused — hidden inside every resident's maintenance fee.

KotiCharge solution

Measure each charger's peak contribution, bill it to the right resident. Optionally cap peak load so spikes never happen. Everyone pays exactly their share — nothing more. Residents who charge overnight pay zero power charge — peaks don't occur at night.

3

monthly peaks determine the power charge

100%

of EV-caused peak cost billed to EV owners

€0

extra power charge for non-EV residents

Auto

monthly report with full peak breakdown

The background

What is power charge — and why do EVs make it worse?

How power charge is calculated

Your grid operator measures the building's power draw every hour. At the end of the month, they take the three highest hourly peaks and calculate the average. That number, in kilowatts, is multiplied by the network tariff rate — and charged to the housing company.

Peak average (kW) × tariff rate = monthly power charge

Typical network tariff: ~€5 / kW / month. Example: a 30 kW peak = ~€150/month for the whole building.

Why EV chargers spike the peak

EV chargers draw 7–22 kW each. When several residents arrive home at the same time and plug in, the combined load creates a sharp evening peak. A building that previously peaked at 30 kW can suddenly see 80–100 kW spikes — multiplying the power charge two to three times.

Without EVs
30 kW ~€150/mo
With 5 EVs charging at once
95 kW ~€475/mo
+€325/month extra power charge — shared across all residents, including those without an EV.

The solution

How KotiCharge makes it fair

Two tools working together — attribution and prevention.

Tool 1 — Peak attribution

Measure who caused the peak, bill them for it

  • During each hourly peak, KotiCharge records how much power each charger was drawing
  • Each charger's share of the peak is calculated as a percentage of the total EV load
  • That percentage of the month's power charge is billed to the resident who caused it
  • Residents who charged overnight — when no peak occurred — pay nothing extra

Tool 2 — Power cap

Limit EV load during peak hours — prevent spikes entirely

  • Set a maximum combined power limit for all EV chargers during defined peak hours (e.g. 07:00–21:00)
  • When the limit is reached, KotiCharge automatically throttles charging across active sessions
  • The building's peak stays predictable — power charge stays low for everyone
  • Overnight the cap lifts, chargers run at full speed, cars are ready by morning

KotiCharge app — peak hour settings

Residents choose how they want to handle peak hours

During defined peak hours the app gives each resident full control. They pick the mode that fits their schedule — no surprises, no hidden charges.

  • Charge and pay

    Charge normally during peak hours and pay the resulting power charge share. Maximum flexibility.

  • Warn me

    The app sends a notification before starting a peak-hour session — the resident confirms or delays.

  • Block charging

    Peak-hour sessions are prevented entirely. Car charges automatically once the peak window closes.

KotiCharge app screen showing peak hour charging mode selector: charge and pay, warn me, or block charging

The result: EV owners pay their fair share — and only their fair share

The EV-caused power charge is collected from EV owners individually, just like their electricity usage. Non-EV residents see no change in their maintenance fee. Property managers get a monthly breakdown showing exactly how the power charge was split.

For EV owners

Stop paying twice for your EV.

Without KotiCharge, EV owners already pay for the electricity they use — and then again, hidden inside the building's maintenance fee, for the power charge their charging caused. That's a double charge most residents never even notice.

With KotiCharge, the power charge share is calculated, attributed, and billed directly. You see exactly what you owe — and the maintenance fee for the whole building stays fair.

Pay your exact share of power charge — no more, no less
Charge overnight to minimise your peak contribution
Smart scheduling automatically picks off-peak hours
Monthly receipt shows energy cost and power charge separately

Without KotiCharge

Electricity usage

paid via charger invoice

€28.40

Your share of power charge

hidden in maintenance fee — shared with everyone

~€12.00

Non-EV residents' subsidy

you pay part of their share too

~€4.00

With KotiCharge

Electricity usage

exact spot-price or fixed rate

€28.40

Your power charge share

only what your charger caused — billed directly

€8.00

Non-EV residents' subsidy

their maintenance fee stays unchanged

€0.00

For property managers

The power charge report — ready for your books.

Every month KotiCharge produces a full breakdown — no manual calculation needed.

Peak event log

Each of the three monthly peak hours listed with time, total building power, and EV charger contribution.

Per-resident attribution

Each EV owner's share of the peak load and corresponding power charge amount — ready to bill or attach to accounting.

Housing company summary

Total power charge for the month, and a breakdown of power charge contribution from each resident.

Common questions

Frequently asked questions

What is power charge?
Power charge is a demand-based component of the electricity network fee in Finland. Your grid operator charges it based on the three highest one-hour peak power draws of the month. The higher the peak, the higher the monthly fee — paid by the whole housing company.
Why do EV chargers increase the power charge?
When multiple residents charge their cars at the same time — typically in the evening — the combined load creates a power spike. This spike becomes one of the three monthly peaks used to calculate power charge. Without any control, EV chargers can significantly raise the bill for the whole building, including residents who don't own an EV.
How does KotiCharge split the power charge fairly?
KotiCharge measures each charger's contribution to every power peak. The share of power charge caused by EV charging is calculated per charger and billed to the resident who used it. Residents who charge at off-peak hours contribute less or don't have to pay for power charge. The rest of the building's power charge — caused by lifts, heating, shared lighting — stays with the housing company as before.
Does the power cap affect comfort or charging speed?
For most residents, no. The power cap limits the combined EV charging load during peak hours — typically evenings. Overnight, there is plenty of capacity and charging runs at full speed. Smart scheduling automatically moves sessions to off-peak windows when possible, so cars are still ready by morning.
See full pricing → · All housing features →

Ready to make EV charging effortless for everyone?

Join housing companies and businesses across Finland who trust KotiCharge to handle billing, savings, and everything in between.

Average switching time from another operator: under 10 min · No disruption to residents

Request a proposal Call us: +358 457 835 8987

35

cities across Finland

500

charging locations

2000

chargers managed