Compare installers: contact details, locations and Tukes register entries in one place.
We list 15 companies in Lappeenranta. Of those, 10 are in the Tukes register (checked 11 September 2026). The brands that come up most often are Bosch, ABB and Fronius.
Below is each company’s own page, with its contact details and the area it serves, and its offices on the map.
15 results
Serves all of Finland
Eroaverkosta.com (Engifar Oy) is an online store and expert specializing in off-grid electricity systems. The company offers solar power systems, batteries, and accessories for boats, caravans, and summer cabins. The selection is based on personal product testing and equipment suitable for Finnish conditions.
LVI-Toivanen Oy professionally offers HVAC solutions for companies, housing associations, and households. Services include diverse HVAC work, such as heat pump solutions, in the Lappeenranta and South Karelia region. Strengths are a customer-oriented approach and extensive expertise.
In the Tukes register: operating right e3, valid until 12.3.2029. Checked 11.9.2026.
✅ Tukes-certified cooling and electrical contracting company that sells and installs heat pumps, panels, and heating equipment in the Imatra and Lappeenranta region. The company specializes in renewable energy solutions, offering turnkey installation, maintenance, and repair services.
In the Tukes register: operating right L. Checked 11.9.2026.
✅ Certified solar electricity provider and reliable Finnish family business. Sons of Solar Kaakkois-Suomi offers high-quality solar panel solutions, batteries, and charging stations on a turnkey basis. We use our own qualified electricians and the best components in the industry. Serving Lappeenranta and the Southeast Finland region with professional expertise.
HKS Sähkö- ja Kiinteistöpalvelut Oy is a specialized electrical and property maintenance company based in Joutseno, Finland. Services include electrical contracting, design, heat pumps, solar panels, and EV charging stations. The company also offers property maintenance and is a member of the Elfin chain, serving the Lappeenranta and Imatra regions.
In the Tukes register: operating right A. Checked 11.9.2026.
✅ Tukes-certified full-service heating company specializing in heat pump solutions. Operating since 2008, the company sells, installs, and services Bosch, Thermia, and Mitsubishi Electric geothermal, air-to-water, and air-to-air heat pumps. The service area covers the Imatra, Lappeenranta, Kotka, and Kouvola regions.
In the Tukes register: operating right A öljy. Checked 11.9.2026.
Loistox Oy is a company specializing in solar power and the energy sector, which designs, sells, and installs solar power systems, air-to-water heat pumps, and air-source heat pumps on a turnkey basis. The company serves the entire Finnish territory, providing solutions for private homes, businesses, and farms.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
✅ Tukes-certified electrical multidisciplinary expert in the South Karelia region, specializing in renewable energy solutions. Services include electrical and telecommunications installations, solar power systems, heat pumps, and fire alarm installations for individuals, companies, and housing associations.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Sähköpalvelu Tilli & Hakulinen Oy (SPTH) is an electrical contractor established in 1985, based in Lappeenranta. They provide comprehensive electrical services, 24/7 emergency repairs, solar power systems, EV charging stations, and thermal imaging in South Karelia. Serving residential, commercial, and agricultural clients, SPTH is a certified STUL member known for professional quality.
In the Tukes register: operating right A. Checked 11.9.2026.
Sähkötoimisto Lehto Ky is a Tukes-certified electrical contractor based in Lappeenranta, established in 1995. We provide comprehensive electrical installations, solar power systems, air source heat pumps, EV charging stations, as well as IT and intercom systems. We serve households, housing associations, and businesses throughout the South Karelia region with professional expertise.
In the Tukes register: operating right A (sj). Checked 11.9.2026.
Redin Teho Group is an electrical contractor operating in the Lappeenranta and Kotka regions, serving the public sector, construction companies, housing associations, and industry. The group consists of Redin Oy and Sähköliike Teho Oy, providing strong electrical expertise, contracting, and maintenance services.
The company states it is in the Tukes register. We have not confirmed this against the register.
Sähkö-Systema Oy is a full-service electrical installation company founded in 2011 and based in Lappeenranta, Finland. They provide comprehensive electrical services, including contracting, planning, and maintenance for residential and commercial clients. Their offerings also include Bosch, Fujitsu, and Panasonic air source heat pumps, solar panels, and EV charging stations, serving the South Karelia region.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Founded in 2010, GreenEnergy Finland Oy (GEF) is a Finnish pioneer in solar energy and energy management solutions. The company specializes in supplying solar power packages and has developed the proprietary GEF Vision energy management service, which enables smart control of energy production and consumption. GEF is part of the Flinkenberg Group.
✅ Tukes-certified JA Sähkö Systems (est. 2019) specializes in electrical planning and installations in Lappeenranta and South Karelia. Services range from basic electrical work to solar panels, including automation systems (Siemens/Shelly) and statutory commissioning measurements. The company serves both private individuals and corporate clients.
In the Tukes register: operating right A. Checked 11.9.2026.
Serves all of Finland
Kotisol Oy is a company specializing in the installation of solar power systems, serving private houses, companies, and farms throughout Finland. It offers comprehensive "turnkey" installation services through its partners and has completed over 5,000 energy renovations. The company's electricians have the appropriate contracting rights.
The company states it is in the Tukes register. We have not confirmed this against the register.
Enter your postal code and the service. Before you send anything you will see which companies your request goes to – at most three.
Published prices across Finland run 1,000–1,800 €/kWp. 1,000–1,400 €/kWp turnkey — a vendor’s stated range (1komma5.com, 2026). 1,000–1,800 €/kWp turnkey, by equipment quality — a vendor’s stated range (grivolt.fi, 2026). Usually quoted separately: scaffolding or a lift, fall protection and work on the electrical panel.
Sources:1komma5.com, 2026; grivolt.fi, 2026
Household tax credit: 35% of the labour share of a company invoice, up to €1,600 per person per year, with a €150 own share (Verohallinto, 10 February 2026). The government has proposed raising this to 40% and €2,100 for 2026–2027, retroactively from 1 January 2026 (HE 113/2026 vp, Eduskunta, 11 June 2026). Parliament has not passed the bill, and the tax administration still writes about it in the conditional (Verohallinto, 16 June 2026).
Sources:Verohallinto, 10 February 2026; Eduskunta, 11 June 2026; Verohallinto, 16 June 2026
Across Finland the range is 776–940 kWh/kWp, and it is not a clean north-south gradient: coastal Oulu out-yields inland Tampere and Jyväskylä, because cloud climatology matters more than latitude (PVGIS 5.3 (EC JRC), 3 September 2026). What decides the payback is not the yield but how much of it you use yourself: in a detached house that is 50–80% (Motiva, 30 December 2025).
Sources:PVGIS 5.3 (EC JRC), 3 September 2026; Motiva, 30 December 2025
We list 15 companies in Lappeenranta, and 10 of them are in the Tukes register (checked 11 September 2026). The map above shows which of them work nearest to you; open a company’s own page for its contact details and service area.