What Greencell does

Greencell OÜ is a Tallinn-based solar energy company founded in 2017 that designs and installs photovoltaic (PV) power plants for residential, commercial, and institutional customers across Estonia. The company offers two primary architectures — microinverter and string inverter solutions — sourcing components from global manufacturers including Hoymiles (microinverters), Huawei and Solis (string inverters), and panels from Maysun Solar, Trina Solar, Longi, and Jolywood. Its core technology proposition centers on microinverter architecture, which it claims produces 5-25% more energy than string inverter alternatives through independent panel-level optimization, with a complementary free cloud-based panel-by-panel monitoring system included with microinverter projects.

The business operates as a vertically integrated installer plus hardware distributor, with project sizes ranging from 8-30 kW residential installations to over 1 MW commercial deployments (including a documented 1,008 kW project at Ahtri4 in Tallinn). Beyond solar installation services, Greencell sells LED lighting products through a website-based e-commerce shop, generating revenue through both professional installation services and hardware sales. Pricing is not publicly disclosed and is handled via direct phone (50 11 262) and email ([email protected]) inquiries; the company markets through its Estonian-language website, a completed-project references portfolio, and direct sales engagement.

The company is registered as an Estonian private limited company (OÜ) with a single headquarters at Ranna tee 46a/1-8, Tallinn, and is managed by Lembitu-Aeg Arbeiter. With no disclosed funding rounds, headcount, or revenue figures, and operations limited entirely to Estonia, Greencell presents as a small-to-mid-sized regional solar EPC and component distributor rather than a multi-market operator. It claims to have built the Baltic's largest microinverter solar power plant, signaling category leadership within microinverter architecture in the Baltic region.

Name

Greencell

Legal name

GREENCELL OÜ

Website

https://greencell.ee

Company type

Private

Founded year

2017

Operating status

Operating

Headcount range

1–10 employees

Short description

Greencell OÜ is an Estonian solar EPC and photovoltaic component distributor, founded 2017 and headquartered in Tallinn, that designs and installs microinverter and string inverter solar power plants for residential, commercial, and institutional customers across Estonia.

Ownership category

akta.pro rank

Product category

Solar Power Plant Design and Installation

NAICS

Solar Electric Power Generation (221114), Electric Lamp Bulb and Other Lighting Equipment Manufacturing (335139)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electric Lighting & Wiring Equipment (3640)

akta.pro primary industry

Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters) (EUAMABAE)

akta.pro secondary industries

Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ), Distributed Generation (DG) Solar & Small Wind (EUAMAJAD), Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

Keywords

• Solar power plant installation
• Photovoltaic system design
• Microinverter solar solutions
• Commercial solar installation
• LED lighting distribution

Headquarters

HQ city

Tallinn

HQ country

Estonia

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Solar Power Plant Design and Installation: Design and construction of solar power plants for residential homes, production, warehouse, or office buildings. Services include system sizing, component procurement, installation, and assistance with energy grid sales contracts.
2. Solar Equipment Sales: Sales of solar panels, microinverters, string inverters, and LED lighting products to customers, including both components and complete systems.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Greencell designs, sells components for, and installs solar power plants for residential, commercial, and institutional buildings across Estonia, offering both microinverter and string inverter configurations. The company sources solar panels (Maysun Solar, Trina Solar, LONGi, Jolywood) and inverters (Hoymiles, Huawei, Solis), provides system sizing, installation, and assistance with energy grid sales contracts, and distributes LED lighting products through its e-commerce storefront.

Product overview

GREENCELL is an Estonian solar energy solutions company founded in 2017 that designs and builds solar power stations for residential, commercial, and industrial buildings. The company offers two main solar installation technologies: micro-inverter solutions (using Hoymiles inverters) and string-inverter solutions (using Huawei and Solis inverters), along with LED lighting products. Micro-inverter solutions provide 5-25% higher energy production with individual panel monitoring and 12-25 year warranties. The company uses solar panels from manufacturers including Trina Solar, Jolywood, LONGI, and Maysun Solar, with installations ranging from small residential (3-30 kW) to large commercial projects (up to 1,008 kW). A complimentary monitoring system is included with micro-inverter installations for real-time performance tracking.

Differentiator

Problem solved

Functional benefit

Quantifiable outcome

• 5-25% higher electricity production compared to string inverter solutions
• +3 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Five partnerships are on record, tiered core.

• HoymilescoreTechnology or IntegrationPrimary microinverter supplier for Greencell's solar installations. Greencell uses various Hoymiles microinverter models including MI-1200, MI-600, HM-1200, HM-1500, HMS-1600-4T, HMS-1800, HMS-2000, HMT-1800 in their projects ranging from small residential to large commercial installations.
• Maysun SolarcoreTechnology or IntegrationPrimary solar panel supplier for many of Greencell's installations. Maysun Solar panels used include various models from 340W to 530W full black variants.
• Trina SolarcoreTechnology or IntegrationSolar panel supplier used in larger commercial installations. Trina Solar 505W PV panels used in 300kW+ commercial projects.
• Longi SolarcoreTechnology or IntegrationSolar panel supplier for various installations. Longi Solar 450W and 375W panels used in residential and commercial projects.
• Huawei (inverter division)coreTechnology or IntegrationString inverter supplier for larger commercial installations. Greencell uses Huawei inverters including 3×100kW + 1×20kW combinations for 320kW installations.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Zolar: German online solar marketplace and installer connecting homeowners with local installers; comparable digital-acquisition-led residential solar model relevant to Greencell's online-shop-enabled sales motion.
• Enpal: Germany's largest residential solar leasing company; comparable business model offering rooftop PV with financing and optional add-ons (heat pumps, EV charging), representing the scaled-up version of Greencell's current dual-residential/commercial approach.
• Otovo: Norwegian-listed residential solar subscription/installer operating across Northern Europe; directly comparable to Greencell's residential rooftop solar model, with subscription-based financing Greencell could emulate as it scales.
• 1Komma5°: German residential rooftop solar, heat pump and EV-charger installer with integrated energy-as-a-service model; comparable to Greencell's mission of bundling distributed renewable energy solutions for homeowners.

Regional players

• Enefit Green: Estonian/Baltic renewable energy producer (wind, solar, biomass, hydro); comparable Baltic-region renewable player, though operating at utility-scale rather than the rooftop DG niche Greencell focuses on.

Broad incumbents

• Eesti Energia: Estonian state-linked energy utility offering distributed solar generation and electricity services; the dominant incumbent in Greencell's home market whose grid, retail and emerging solar services compete directly with Greencell's offerings.
• Sunrun: Largest US residential solar installer with leasing/PPA model; benchmark for the scaled residential-solar-as-a-service business Greencell could evolve toward, though US-centric and far larger in scale.
• SolarEdge: Global power optimizer and string inverter manufacturer; competing technology platform to the microinverter approach Greencell champions, and a benchmark for the broader inverter category Greencell operates in.
• Enphase Energy: Global microinverter and energy technology incumbent; both a competitive threat (could disintermediate installers) and a strategic supplier comparable to Greencell's primary Hoymiles relationship, defining the category Greencell competes within.
• SunPower: US-headquartered residential and commercial solar installer and panel manufacturer; comparable dual-segment (residential + commercial) installer footprint Greencell replicates at much smaller scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Greencell