EV Charge — Home Charger

Two kinds of limit

Max speed — the normal one

This is the charger's saved limit. It is written into the charger itself, so it survives unplugging the car, power cuts and restarts. It stays exactly where you put it until somebody changes it in this app.

Use this for the speed you normally want, day to day.

Temporary max speed

Temporary max speed resets as soon as the car is unplugged from the charger. The next time someone plugs in, the charger goes straight back to the saved Max speed.

Use it for one-off situations — for example turning the car down to 6 A while the oven, the water heater and the sauna are all running, without losing your normal setting.

Which one wins?

The charger always uses the lower of the two. So a temporary cap of 8 A will hold the car at 8 A even if the saved max speed is 16 A.

About the pause button

Pause sets the car charger to 0 A. It is always a temporary instruction, so charging resumes by itself the next time the car is unplugged and plugged back in.

Saving a new Max speed has a 30-second cool-down in the charger. If you change it twice quickly the app waits and retries on its own.

How your bill works

Every kilowatt-hour you use is billed twice — once for the electricity itself, and once for transporting it through the grid. On top of that there is a fixed monthly fee that depends on how hard you push the grid in a single hour.

1 · The electricity — 50 øre/kWh

With Norgespris the price of the power itself is fixed at 0.50 kr per kWh, day and night, all year. Nothing you do with the charger changes this part per kWh — only how many kWh you use.

2 · Grid transport — cheaper at night

This covers the grid company plus state charges (Elavgift and the Enova fee). It is deliberately cheaper outside peak hours so that people move their heavy use to the night.

When	Price
Weekdays 06:00 – 22:00	46.60 øre
Weekdays 22:00 – 06:00	31.40 øre
Weekends & public holidays	31.40 øre

A full charge of about 50 kWh costs roughly kr 7.60 less if it runs on the night rate instead of the day rate. Plugging in and starting after 22:00 is the single easiest saving.

Purely from the energy rate difference (15.20 øre, or kr 0.152 per kWh), you save kr 30.40 per 1,000 km driven in the Lexus RZ 450e — assuming an average efficiency of 20 kWh / 100 km.

Annual distance	Energy used	Pure kWh rate savings
8,000 km	1,600 kWh	kr 243.20
10,000 km	2,000 kWh	kr 304.00
12,000 km (Norwegian average)	2,400 kWh	kr 364.80
15,000 km	3,000 kWh	kr 456.00
18,000 km	3,600 kWh	kr 547.20
20,000 km	4,000 kWh	kr 608.00

3 · The capacity step — a monthly fee

The grid company also charges a fixed monthly fee based on your busiest hours. They take the three highest hours of the month, each on a different day, and average them. That average decides which step you land on:

Step	Average of 3 top hours	Per month
1	0 – 2 kW	kr 150
2	2 – 5 kW	kr 250
3	5 – 10 kW	kr 420
4	10 – 15 kW	kr 585
5	15 – 20 kW	kr 755

This is where the car really matters. Charging at full 11 kW while the house is already using 3 kW makes that hour a 14 kW hour — step 4 instead of step 2, which is kr 335 extra every month. Charging slower, for longer, avoids it completely.

Getting the bill down

Charge at night. After 22:00 on weekdays, or any time at the weekend.
Charge slowly. The car needs the same kWh either way — but 6 A over eight hours keeps your busiest hour low, while 16 A for three hours spikes it.
Don't stack heavy things. If the car is charging, that is not the hour for the sauna, the tumble dryer and the water heater at once.
Only three hours count. One careless hour will not ruin the month — but three will.
80% is usually plenty. Charging to 80% instead of 100% saves money and is kinder to the battery.

Prices are the ones set for this household. If the grid company changes them, they can be updated in the app.

Where the numbers come from

The car

Lexus RZ 450e (2023) — 63 kWh usable out of 71.4 kWh gross. Charging over AC is about 90% efficient, so roughly one kWh in ten is lost as heat and never reaches the battery. The app already adds that on top, which is why "energy needed" is larger than the battery gap.

The charger

Easee Charge Lite, Type 2 — the slider goes up to 16 A. On a three-phase supply each amp is worth about 0.69 kW, so 6 A ≈ 4.2 kW and 16 A ≈ 11 kW. While the car is actually charging the app measures the real figure from the charger and uses that instead of guessing.

The car is the ceiling here: the RZ 450e's onboard AC charger stops at 11 kW. On three phases that is reached at about 16 A, so there is nothing to gain above it.

Battery percentage

The car cannot tell the charger how full it is, so you type it in once — read it off the car's screen or the Lexus app. After that, while a session is running, the app counts it up by itself from the energy the charger reports it has delivered. Re-check it now and then; after a drive it will be out of date.

Range

Based on about 370 km from a full battery in mild weather. In cold weather the app drops that by roughly 28%, which is normal for a Norwegian winter. You can force mild or cold in Settings. Treat it as a guide, not a promise — driving style, speed and heating all matter.

Time and cost

Time is simply the energy needed divided by the charging power. The cost is worked out hour by hour across the whole session, so a charge that starts before 22:00 and finishes after it is priced correctly on both sides of the change.

The monthly capacity fee is not included in the cost of a single charge — it is a monthly amount, shown separately in the grid-step card.

Add to your phone

Installed, it opens full screen from your home screen with its own icon — no address bar, and it still works if the phone briefly loses signal.

Which charger

The battery level follows the car, so it carries across. Charging speed is remembered separately for each charger.

This will not finish by 06:00

Settings

Vibration feedbackA small buzz as the sliders move

Range estimateCold weather cuts range noticeably

EV Charge Control

Set charging speed

Charge tonight instead

Battery % right now

Electricity price

Monthly grid step

Charger

Two kinds of limit

Max speed — the normal one

Temporary max speed

Which one wins?

About the pause button

How your bill works

1 · The electricity — 50 øre/kWh

2 · Grid transport — cheaper at night

3 · The capacity step — a monthly fee

Getting the bill down

Where the numbers come from

The car

The charger

Battery percentage

Range

Time and cost

Add to your phone

Which charger

This will not finish by 06:00

Jump to

Settings

Charger

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