alfasolar GmbH

What alfasolar GmbH does

alfasolar GmbH (also doing business as Alphasolar / Alpha Solar) is a privately held German solar energy solutions provider founded circa 2002, headquartered across two sites: Hallbergmoos (solar energy focus) and Löwenstein (PV modules and inverters). The company designs, sources, and sells a portfolio of photovoltaic products — complete PV systems built on JA Solar modules with optional battery storage and EV charging, mini PV balcony power plants (Balkonkraftwerke) at 300W-600W per module, solar fences (Solarzaun), solar heating systems (Sonnenheizung) using ceramic heating elements, and ground-source heat pumps — directly to consumers and trade buyers through an online shop and a network of 70+ pickup stations across Germany, Austria, and Italy.

The company's go-to-market blends direct-to-consumer e-commerce with a human advisory layer provided by the check.energy platform (operated by gleich3.tv GmbH in Hannover), which supplies editorial content, free phone and email consultation, and lead nurturing across social channels. Pricing is bespoke ("custom-made without surcharge") rather than standardized; product revenue is one-time hardware sales, and the customer base is fragmented across private homeowners, renters served via balcony plants, and commercial/trade purchasers.

The business model is best characterized as a specialized D2C solar retailer with a content- and advisory-driven marketing funnel. Competitive advantages cited include 20+ years of domain experience, advisor competence reflected in 640+ Trustpilot reviews, supplier relationships with JA Solar and SMA, and a flexible distribution footprint via pickup stations. Limitations include lack of disclosed revenue or headcount data, no proprietary AI or software stack, and exposure to commodity module pricing and German energy policy cycles.

Name

alfasolar GmbH

Legal name

alpha solar gmbh

Website

https://alfasolar.de

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

1–10 employees

Short description

alfasolar GmbH is a privately held German solar retailer selling PV systems, balcony power plants, solar heating, and ground-source heat pumps directly to homeowners, renters, and trade buyers via an online shop and 70+ pickup stations across Germany, Austria, and Italy.

Ownership category

akta.pro rank

Product category

Residential Solar Energy Systems

NAICS

Ventilation, Heating, Air-Conditioning, and Commercial Refrigeration Equipment Manufacturing (33341)

SIC

Retail-Building Materials, Hardware, Garden Supply (5200)

akta.pro primary industry

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

akta.pro secondary industries

Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ), Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters) (EUAMABAE), Solar Mounting, Racking & Trackers (Fixed-Tilt, Single/Dual-Axis, Rooftop Mounts) (EUAMABAF)

Keywords

• Photovoltaic systems
• Balcony solar systems
• Solar heating
• Heat pump installations
• Solar inverters

Headquarters

HQ city

Hallbergmoos

HQ country

Germany

HQ region

Europe

Offices3 records

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Photovoltaic (PV) System Sales: Sale of customized photovoltaic systems with or without battery storage or EV charging stations. Products sourced from JA Solar PV modules. Offered as bespoke packages without standard pricing, delivered directly or via pickup stations.
2. Balkonkraftwerk (Balcony Power Plant) Sales: Mini PV systems (balcony power plants) with 1, 2, or 4 panels, 300W to 600W per module. Sold directly via online shop with optional home delivery or self-pickup.
3. Solar Heating Systems: Solar heating products that convert PV energy into warm water using ceramic heating elements. No registration required for installation.
4. Heat Pump Sales: Ground-source heat pumps (Erdwärmepumpe) sold as products, with installation guidance provided.
5. Accessories and Add-ons: Sale of PV accessories, mounting systems (Schienensystem), and related components through the online shop.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

alfasolar GmbH designs and sells custom-tailored photovoltaic systems using JA Solar modules — with or without battery storage and EV charging stations — alongside plug-in balcony power plants (Balkonkraftwerke) ranging from 300W to 600W per module, solar heating (Sonnenheizung), ground-source heat pumps (Erdwärmepumpe), and module-level inverters (Modulwechselrichter). Products are sold directly via an online shop with home delivery or self-pickup from 70+ stations across Germany, Austria, and Italy, supported by free advisory consultation through the check.energy platform.

Product overview

Alfasolar GmbH offers a comprehensive portfolio of solar energy solutions based in Hallbergmoos and Löwenstein, Germany. The core offerings center on photovoltaic (PV) systems using JA Solar modules with optional battery storage and EV charging, complemented by balcony solar systems (Balkonkraftwerke) in various power configurations. Additional products include solar fencing, solar heating systems, ground-source heat pumps, and specialized inverters including module-level optimizers for mini PV installations. The company provides custom-tailored solutions without additional cost, supported by an online shop with PV packages and over 70 pickup stations across Germany.

Differentiator

Problem solved

Functional benefit

Products and services

• Photovoltaic Systems (Photovoltaikanlagen / PV Anlagen) Complete photovoltaic systems using JA Solar PV modules, offered with or without battery storage and EV charging (Auto-Tankstelle). Sold as custom-made (Maßanfertigungen) solutions tailored to individual customer requirements rather than standard packages, with no additional cost for customization. Customers order via the online shop with delivery or pickup.
• Balcony Power Plants (Balkonkraftwerke / Mini PV Anlagen) Compact plug-in solar systems consisting of 1, 2, or 4 solar panels with power ratings from 300W to 600W per module. Designed for renters and balcony/terrace owners without roof access; connects directly to the existing household electrical system via a standard plug. Sold via online shop with optional home delivery or self-pickup.
• Solar Heating Systems (Sonnenheizung) Solar heating system that converts energy from PV modules into domestic hot water via a ceramic heating element in a storage tank. Integrable into nearly any existing heating system. Installation does not require registration.
• Ground-Source Heat Pumps (Erdwärmepumpe / Wärmepumpe) Heat pump systems leveraging geothermal energy. alfasolar specifically favors ground-source over air-source pumps due to the smaller temperature differential between the energy source (ground) and heating temperature in winter, yielding higher efficiency. Produces up to 6x more heat from one unit of energy compared to oil/gas combustion.
• Solar Fence (Solarzaun) Vertically-mounted solar panels that function as garden fencing, sound/noise barriers, privacy screens, or hedge replacements. Optimized for winter conditions when the sun angle is low, so vertical panels receive sunlight at near-optimal angles.
• Inverters and Module-Level Optimizers (Wechselrichter / Modulwechselrichter) Inverters converting DC output from solar modules into grid-compatible AC power. Includes module-level inverters (Modulwechselrichter) specifically designed for mini PV systems, optimizing the performance of individual solar panels under varying light conditions. Sourced from SMA.

Quantifiable outcome

• Heat pumps produce up to 6x more heat from one unit of energy compared to oil/gas combustion.
• +2 more outcomes

Named customers3 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

Feature6 records

Partnerships

Four partnerships are on record, tiered core and minor.

• JA SolarcoreTechnology or IntegrationJA Solar is a major supplier of photovoltaic modules used in Alphasolar's PV systems. Alphasolar sells PV packages with JA Solar modules, with or without battery storage. This is a core product supply partnership underpinning the company's main product line.
• SMAcoreTechnology or IntegrationSMA is a manufacturer of inverters, including the 'electronic solar switch' (ESS) — a protected DC disconnect switch designation. Alphasolar sells SMA products including module inverters (Modulwechselrichter) specifically designed for mini PV systems. Products help optimize individual solar panel performance under varying light conditions.
• check.energy (gleich3.tv GmbH)coreGTM or Marketing Partnercheck.energy is an independent energy consulting platform that markets Alphasolar products and provides free, non-binding advisory services. The platform features editorial content about solar topics and drives customer acquisition through its website, phone, and email channels. Contact: Kampsriede 6a, 30659 Hannover, Germany.
• Alpha ESS Europe GmbHminorOthersAlpha ESS Europe GmbH (based in Langen, Germany) focuses on energy storage products. The company is distinct from Alphasolar GmbH — customers searching for 'Alpha ESS' may confuse the two companies. ESS also stands for 'electronic solar switch' (a protected SMA designation).

Scale indicators3 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Sonnen (sonnen GmbH): Wildpoldsried, Germany-based home battery storage and virtual power plant provider, now part of Shell. Comparable as a DACH-focused home energy storage brand and a broad incumbent that frequently appears alongside PV and heat pump offerings.
• Enphase Energy: US-listed global leader in microinverters and home energy systems, with strong DACH presence. Comparable as a major MLPE/balcony-PV inverter supplier competing directly with the SMA inverters Alphasolar resells, and a broad incumbent in residential solar electronics.
• Fronius International: Austrian family-owned manufacturer of solar inverters, welding, and battery charging technology with strong DACH presence. Comparable as a direct competitor to SMA inverters in the DACH market and a broad incumbent in residential solar electronics.
• SMA Solar Technology: Niestetal, Germany-based global manufacturer of solar inverters, including string, central, and hybrid inverters, plus storage and energy management systems. Comparable as a key supplier of inverters to Alphasolar and a broad incumbent serving the DACH residential solar market.
• Viessmann (Heat Pumps / ViShare): Allendorf, Germany-based major manufacturer of heating, industrial, and refrigeration systems, with a strong heat pump portfolio increasingly bundled with PV. Comparable as a broad incumbent in DACH heat pumps that competes directly with Alphasolar's ground-source heat pump offering.

Direct peers

• Zolar: Berlin-based online solar platform that configures and sells PV systems, battery storage, and heat pumps to German homeowners, partnering with regional installers. Directly comparable as a digital-first residential solar retailer in the DACH market.
• Enpal: Berlin-based residential solar leasing and sales company offering PV systems, batteries, heat pumps, and EV chargers to German homeowners. Directly comparable as a DACH-focused, end-to-end home solar provider with a strong direct-to-consumer model.
• E3/DC (Hager Group): Osnabrück, Germany-based provider of residential PV, battery storage, and EV charging systems, including heat pump integration. Directly comparable as a DACH home energy provider with similar product portfolio spanning PV, storage, and heat pump-ready systems.
• Solarwatt: Dresden-based manufacturer and installer of PV systems, glass-glass modules, and battery storage, serving German residential and commercial customers. Directly comparable as a vertically integrated DACH home solar provider with similar product mix.
• 1Komma5° (1point5 Degrees): Hamburg-based climate-tech company offering residential PV, heat pumps, EV charging, and dynamic electricity tariffs in DACH. Directly comparable as a multi-product home energy provider serving German homeowners and increasingly renters, with similar go-to-market and product breadth.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/check.energy
• Instagraminstagram.com/check.energy
• TikToktiktok.com/@check.energy
• LinkedInlinkedin.com/company/alfasolar-gmbh

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 alfasolar GmbH