Question 1

How much does it cost to install three-phase power?

Accepted Answer

The cost of installing three-phase power in a house or apartment depends entirely on the conditions. Is three-phase already routed to the electrical panel but not to the stove? Then it's a minor procedure. Must the cable be routed from the grid into the house, or the entire panel replaced? Then it will be more expensive. Contact us for an exact quote.

Question 2

Why do I need to upgrade to three-phase?

Accepted Answer

In older apartments and houses, single-phase (230V) is standard. This is not enough if you are going to install energy-demanding modern equipment like a powerful induction hob, a heat pump, or especially an EV charger. Three-phase (400V) distributes the power across three separate phases, giving you access to significantly more power and faster charging/heating.

Question 3

Can I use the ROT deduction to install three-phase?

Accepted Answer

Yes, you can use the ROT deduction on the labor cost when you hire a certified electrician to change from single-phase to three-phase. This deducts 30% of the labor cost directly on the invoice.

Question 4

Is it possible to charge the EV without three-phase?

Accepted Answer

Yes, it is possible to charge an EV with single-phase, but the charging will be very slow (often limited to 3.7 kW or 7.4 kW max). With three-phase, you can charge up to 11 kW or 22 kW, which drastically reduces the charging time.

Question 5

What should I do in case of an electrical emergency or power outage?

Accepted Answer

Safety first! If your RCD (jordfelsbrytare) trips repeatedly or you smell burning plastic, do not touch anything. Smista Elinstallation offers fast assistance for emergency electrical faults in Greater Stockholm. We do not have a formal 24/7 emergency service, but we always try to help both new and existing customers every day and at all times of the year when an emergency occurs. Call us and we will assess the situation and dispatch a certified electrician as quickly as possible.

Question 6

Which electrical installations provide the biggest savings on my energy bill?

Accepted Answer

The fastest ways to lower your energy costs are installing smart home controls (like Plejd) and upgrading to energy-efficient LED lighting. By scheduling your heating and lighting according to spot electricity prices, you can reduce energy waste by up to 20%. We handle all types of electrical work, from smart homes to safe EV charger installations.

Question 7

Can I use the ROT deduction and Green Tech deduction at the same time?

Accepted Answer

Yes! When we install an EV charger, we apply the Green Technology deduction, giving you a 50% discount on both materials and labor directly on the invoice. For other general electrical work in your home (like upgrading a fuse board), we deduct 30% of the labor cost via the ROT deduction. We handle all the paperwork with the Swedish Tax Agency for you.

Question 8

Why is it important to hire a certified electrical company?

Accepted Answer

Faulty wiring is one of the leading causes of house fires. Smista Elinstallation AB is a fully authorized electrical contractor approved by the Swedish National Electrical Safety Board (Elsäkerhetsverket) with over 30 years of combined experience. This guarantees a safe installation, valid warranties, and the official documentation often required by your insurance company.

Install Three-Phase Power & Upgrade Electrical Panel in Stockholm

When Do You Need to Upgrade to Three-Phase in Your Home?

1. EV Charger Installation

2. Heat Pump or Electric Boiler

3. New Induction Hob in the Kitchen

How the Installation Works from Application to Finished Three-Phase

Get a Quote with ROT Deduction to Install Three-Phase

Frequently Asked Questions About Upgrading to Three-Phase

Further reading & related services

Three-Phase Power in Villas: How It Works and When You Need It

EV Charger with Load Balancing: Complete guide 2026

Preparing your home for an EV: Complete checklist

EV Charger Installation

Fuse Box Upgrade