Optimum Solar

What Optimum Solar does

Optimum Solar is a Hungarian solar energy platform company founded in 2011 and headquartered in Baja, Hungary, operating with approximately 10 employees. The company's primary digital asset is the Napelem Kalkulátor, a free web-based solar yield calculator hosted at optimumsolar.eu that delivers location-specific photovoltaic production estimates for Hungarian cities using satellite irradiance data from PVGIS (EU Joint Research Centre) and the Global Solar Atlas (Solargis). Inputs include city/location, system size (kWp), roof tilt, orientation, and system losses, with city-level yields disclosed for Budapest (~1200 kWh/kWp/year), Szeged (1300–1350), and Győr (1100–1150).

Beyond the calculator, Optimum Solar sells and installs complete photovoltaic systems spanning 0.8 kWp balcony units through 3/5/10 kWp residential rooftop systems up to 50 kWp commercial and 500 kWp solar park installations, plus Energiatároló Akkumulátor (battery storage) add-ons enabling 70–80% self-consumption. Ancillary revenue streams include licensed electrical installation and grid-permitting services and professional panel cleaning using ion-exchange water equipment. The company monetizes primarily through hardware sales and professional services, with pricing of 300,000–450,000 HUF for balcony systems and 15,000–30,000 HUF per residential cleaning.

Customer segmentation is horizontal: residential homeowners (primary), apartment residents seeking balcony systems, and commercial/industrial enterprises. Distribution is fully direct-to-consumer via the website, with the Solar Magazin blog (active through November 2025) serving as the top-of-funnel content engine around Hungarian regulatory developments — notably the 2024 transition from net-metering to gross metering, which has lengthened residential payback periods to 7–10 years and increased the relevance of battery storage and self-consumption optimization.

Name

Optimum Solar

Website

https://optimumsolar.eu

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Hungarian solar platform operating since 2011, providing a free web-based PV yield calculator for Hungarian cities plus photovoltaic system sales, installation, battery storage, and maintenance services for residential, apartment, and commercial customers.

Ownership category

akta.pro rank

Product category

Solar Installation Services

akta.pro industry

PRIMARYEUAMABAB

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System)

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Solar Energy (PV, CSP, Rooftop & Utility-Scale)

SECONDARYEUAMABAH

Solar Design, Engineering & Performance Software (PV Modeling, Digital Twins, Monitoring)

Energy, Utilities & Environment/Renewable Energy (Solar, Wind, Hydro & Geothermal)/Solar Energy (PV, CSP, Rooftop & Utility-Scale)

Keywords

• Solar panel installation
• Photovoltaic systems
• Solar yield calculator
• Balcony solar systems
• Solar maintenance services

Headquarters

HQ city

Budapest

HQ country

Hungary

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Solar panel system sales and installation: Complete photovoltaic system sales including panel installation for residential, commercial, and industrial applications. System sizes range from 0.8 kWp balcony systems to 500 kWp solar parks.
2. Professional solar maintenance services: Professional cleaning and maintenance services for solar panel systems, including specialized ion-exchange water equipment and soft brushes for streak-free results.
3. Electrical installation and permitting services: Licensed electrician services for grid connection, safety switches, distribution operator permits, and bidirectional meter installation for solar systems.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Optimum Solar operates a free, web-based solar yield calculator (Napelem Kalkulátor) for the Hungarian market that estimates annual photovoltaic production, CO2 savings, and ROI based on location, system size, roof tilt, and orientation using PVGIS and Global Solar Atlas data. The company also sells and installs complete photovoltaic systems ranging from 600-800W balcony units to 500 kWp solar parks, plus licensed electrical work, grid connection permitting, and professional solar panel maintenance using ion-exchange water cleaning equipment.

Product overview

Optimum Solar operates as a solar energy calculator and educational platform for the Hungarian market, offering a unified web-based tool suite centered around the Napelem Kalkulátor. The core product is a location-specific solar yield calculator that uses satellite data from PVGIS and Global Solar Atlas to estimate annual energy production, CO2 savings, and ROI for systems ranging from 0.8 kWp balcony units to 500 kWp solar parks. Supporting products include educational content through Solar Magazin, information about rooftop solar installations, balcony solar systems (erkélynapelem), and battery storage solutions. The platform does not appear to offer a SaaS product or API; it functions primarily as a consumer-facing calculator and information resource.

Differentiator

Problem solved

Functional benefit

Products and services

• Napelem Kalkulátor (Solar Yield Calculator) Free web-based solar production calculator that estimates annual energy yield (kWh/year), kWh/kWp, CO2 savings (kg/year), and monthly production breakdown based on Hungarian city/location, system size (0.8-500 kWp), roof tilt angle, orientation, and system losses. Uses PVGIS v5.3 (EU Joint Research Centre) and Global Solar Atlas (Solargis) satellite irradiance data for Hungary-specific climate conditions. Designed for residential homeowners, apartment residents, and commercial/industrial enterprises evaluating solar investments.
• Rooftop Solar System Installation Full-sized rooftop photovoltaic system installations for residential homes (3-10 kWp), commercial buildings (50 kWp), and industrial solar parks (500 kWp). Includes system design, panel supply, mounting, and professional installation. Configurable system sizes, tilt angles, and orientations. Available across Hungary with regional yield data for Budapest, Szeged, Debrecen, Pécs, and Győr.
• Balcony Solar System (Erkélynapelem / HMKE) Mini-PV balcony-mounted solar systems (600-800W capacity) designed for Hungarian apartment residents without rooftop access. Consists of 1-2 solar panels (300-400W each) with micro-inverters converting DC to AC power for immediate household consumption. Produces approximately 850-950 kWh/year in Budapest with up to 80% self-consumption. Includes complete installation and electrical permitting.
• Professional Solar Panel Maintenance and Cleaning Professional cleaning and maintenance service for solar panel systems using specialized ion-exchange water equipment and soft brushes for streak-free results. Residential cleaning services priced at 15,000-30,000 Ft per installation. Helps maintain optimal solar yield by removing dirt and contamination buildup.
• Electrical Installation and Grid Connection Service Licensed electrician services for solar system grid connection, including safety switch installation, distribution operator permit acquisition, and bidirectional meter installation. Required for net-metering/gross-metering compliance in Hungary. Priced at 50,000-100,000 Ft additional on top of system cost for balcony installations.
• Battery Storage Solutions (Energiatároló Akkumulátor) Home battery storage systems that store excess solar energy generated during daylight hours for evening or cloudy-period use. Enables self-consumption rates of 70-80%, improving ROI in regions with lower solar yield such as Pécs and Győr. Sold as an add-on to rooftop or balcony solar installations.

Quantifiable outcome

• Budapest yields: 1200 kWh/kWp/year; Szeged: 1300-1350 kWh/kWp/year; Győr: 1100-1150 kWh/kWp/year
• +4 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators1 record

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• E.ON Hungária: E.ON's Hungarian subsidiary is a major utility that offers solar PV installation, electricity supply, and related services to residential and C&I customers. Comparable because it competes for the same Hungarian solar installation customers, but at vastly greater scale, with bundled energy-supply offerings and stronger brand trust.
• Hanwha Q Cells: Hanwha Q Cells is one of the largest global solar module manufacturers with strong European distribution and growing residential/installer channels. Comparable as a panel supplier whose products are integrated into Optimum Solar's installations, and increasingly as a direct residential-solar brand competing for Hungarian installer customers.
• SolarEdge Technologies: SolarEdge is a global inverter and solar optimizer manufacturer with a residential and C&I installer ecosystem. Comparable as an enabling technology peer — its inverters and now batteries are commonly specified in Hungarian installations like Optimum Solar's, and it competes for the same installer-channel relationships.
• SunPower (Maxeon Solar Technologies): SunPower/Maxeon is a global residential and commercial solar panel and installer brand with European operations. Comparable as a residential solar installer peer offering turnkey PV systems and storage to homeowners — the same primary customer segment as Optimum Solar, though at a much larger global scale.
• MVM Zöld Generáció: MVM's renewable energy arm is the Hungarian state-owned utility's solar and renewables division, offering residential and commercial PV solutions. Comparable because it directly addresses Optimum Solar's primary Hungarian market with installation and supply services, supported by state-utility backing and brand reach.

Emerging players

• Solplanet: Solplanet is the AISWEI consumer brand offering inverters and residential storage across European markets including Hungary. Comparable as an emerging player with hybrid inverter + battery products that compete for the same Hungarian installer customers and balcony/rooftop residential segment Optimum Solar targets.
• Enphase Energy: Enphase is a global microinverter and home energy systems company whose IQ8 balcony-solar and home battery products directly overlap with Optimum Solar's erkélynapelem (balcony) and Energiatároló Akkumulátor offerings. Comparable in product scope (microinverter-based small systems + storage) and customer segment (residential/urban apartment).

Regional players

• Wien Energie: Wien Energie is Vienna's municipal utility offering residential solar, storage, and energy services across Austria, with some cross-border activity in the wider CEE region. Comparable as a utility-affiliated solar installer serving a similar customer profile in a closely adjacent market with overlapping regulatory frameworks.
• Greenergy Holding: Greenergy is a Central European solar installer and renewable energy developer active in the Czech Republic and Hungary. Comparable as a regional solar EPC peer addressing residential and C&I customers with similar turnkey PV offerings in adjacent CEE geographies.
• Fronius International: Fronius is an Austrian inverter and solar energy solutions provider with strong Central European presence, including Hungary. Comparable as an adjacent enabler — it sells inverters and integrated solar solutions that Optimum Solar's installations depend on, and competes indirectly in turnkey solar offerings through installer partners.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/optimum-solar-eu

Revenue estimate

Valuation estimate

Number of profiles

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 Optimum Solar