REFU Elektronik GmbH
REFU Elektronik GmbH is a German power-electronics manufacturer that designs string inverters (20 kW-360 kW), hybrid inverters, battery storage, and the REFUview cloud-monitoring platform for utility-scale, commercial, and industrial solar operators across Europe, Asia, and India.
- Company typePrivate
- Founded1965
- HeadquartersPfullingen, Germany
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What REFU Elektronik GmbH does
REFU Elektronik GmbH is a German power-electronics company founded in 1965 and headquartered in Pfullingen, Baden-Württemberg, that designs, manufactures, and sells string inverters for photovoltaic systems targeting utility-scale solar parks (110 kW-360 kW), commercial and industrial installations (20 kW-50 kW), and — with the 2025/2026 line additions — hybrid and residential applications. The company offers a vertically integrated solution consisting of REFUsol inverters, the REFUlink gateway for monitoring, centralized parameterization and repowering, and the REFUview cloud platform for fleet visualization and remote control, supported by a REFUlog mobile application. Product development and a 12,000 square-meter manufacturing facility operate through wholly-owned subsidiary REFU Hungary in Érd, with an R&D and digital-platform development center in Seville, Spain.
REFU sells predominantly through direct enterprise field sales to EPCs, utilities, and project developers across Europe, Asia, and India, supplemented by a certified service partner network (e.g., Hilker, OIP) for installation, repair, and repowering work, and a 'Become a partner' program for installers and project developers. The revenue model is primarily hardware (inverter units with a 10-year warranty), complemented by service and support contracts, repowering solutions for aging inverter fleets (1-to-1, 2-to-1, and 3-to-1 conversions), and cloud monitoring that is bundled free during the warranty period. Pricing is quote-based and not publicly disclosed; over 400,000 REFU inverters have been installed across more than 25 countries since the REFUsol brand launch in 2007.
REFU is a wholly-owned subsidiary of the PRETTL Group, a family-owned conglomerate, after being reacquired by PRETTL in 2015 (it had been under Advanced Energy GmbH from 2013-2015). The management team comprises Managing Directors Jens Mollitor (appointed November 2024), Gerhard Heilemann, and Hanns Martin Drope. Product momentum centers on the 2024 REFUsol 20K-360K generation including the REFUsol 360K-6T utility inverter, the 2025 REFUhyb hybrid inverter, and the planned 2026 REFUbat residential energy storage launch, alongside active public positioning around EU regulatory tailwinds (exclusion of high-risk-country inverters from subsidies) and NIS2 cybersecurity requirements.
REFU Elektronik GmbH firmographics
Firmographics- Name
- REFU Elektronik GmbH
- Legal name
- REFU Elektronik GmbH
- Website
- https://refu.com
- Company type
- Private
- Founded year
- 1965
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- REFU Elektronik GmbH is a German power-electronics manufacturer that designs string inverters (20 kW-360 kW), hybrid inverters, battery storage, and the REFUview cloud-monitoring platform for utility-scale, commercial, and industrial solar operators across Europe, Asia, and India.
- Ownership category
- akta.pro rank
REFU Elektronik GmbH industry classification
Industry- Product category
- Solar Power Electronics
- NAICS
- Power, Distribution, and Specialty Transformer Manufacturing (335311)
- SIC
- Power, Distribution & Specialty Transformers (3612)
- akta.pro primary industry
- Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters) (EUAMABAE)
- akta.pro secondary industries
- Solar Inverters, Power Optimizers & MLPE Manufacturing (EUAMAHAB), PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC), Renewable Power Electronics & Advanced Inverters R&D (SiC/GaN, Grid-Forming, HVDC Converter Tech) (EUAMAOAF)
Keywords
Where REFU Elektronik GmbH is headquartered
LocationHeadquarters
- HQ city
- Pfullingen
- HQ country
- Germany
- HQ region
- Europe
Offices3 records
Markets served
REFU Elektronik GmbH business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Technology or R&D, Marketing or Sales, Operations
Revenue model
- Solar Inverter Hardware Sales: Sale of string inverters (REFUsol series) ranging from 20kW to 350kW for commercial, industrial and utility-scale PV applications. One-time hardware purchase with 10-year warranty included.
- Energy Storage Systems: Sale of battery storage solutions and hybrid inverter systems (REFUbat, REFUsol storage). Hardware-based energy storage for residential and commercial applications.
- Monitoring Software & Cloud Services: Cloud-based monitoring portal (REFUview) provided free during 10-year warranty period. REFUlog app for system communication and monitoring. Remote firmware updates and parameter management.
- Service & Support: Technical support, commissioning, maintenance and repair services. Service partner network for field support. Spare parts and replacement units.
- Repowering Solutions: Modernization and replacement solutions for aging inverter installations. 1-to-1 exchange solutions and flexible repowering concepts (e.g., 2-to-1 or 3-to-1 system conversions).
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Commercial Inverters (20K-50K series) |
| Unit Pricing | Multi-year contract | Utility Inverters (110K-350K series) |
| Subscription | Annual | Monitoring & Control (REFUlink, REFUview) |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels7 records
REFU Elektronik GmbH product offering
Product offeringCore offering
REFU Elektronik GmbH manufactures solar string inverters under the REFUsol brand (ranging from 20kW to 360kW), hybrid inverters (REFUhyb), battery storage solutions (REFUbat, REFUstore), and complementary monitoring/control hardware and software (REFUlink gateway, REFUview cloud platform, REFUlog app) for utility-scale, commercial and industrial photovoltaic installations. The company produces the inverters at its 12,000 sqm facility in Érd, Hungary, with R&D in Pfullingen, Germany, and Seville, Spain.
Differentiator
Problem solved
Functional benefit
Brands
- REFUsol: Solar inverter product line for commercial, industrial, and utility-scale PV applications
- REFUhyb
- REFUbat
- REFUlink
- REFUview
- REFUlog
Products and services
- REFUsol String Inverter Series (20K-360K)
- REFUlink Gateway
Quantifiable outcome
- Efficiency up to 99.05% for REFUsol 350K
- +2 more outcomes
Companies that use REFU Elektronik GmbH
Customer profileNamed customers8 records
Segments4 records
Ideal customer profiles3 records
REFU Elektronik GmbH technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
REFU Elektronik GmbH partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered minor.
- HilkerminorCertified service partner for repair and maintenance services. Part of REFU's service partner network for regional support in Germany.
- OIPminorCertified service partner for repair and maintenance services. Part of REFU's service partner network for regional support.
Scale indicators6 records
Recent moves7 records
Expansion highlights6 records
REFU Elektronik GmbH competitors and assessment
Company assessmentMarket position
Strengths4 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
REFU Elektronik GmbH social profiles
Digital presenceREFU Elektronik GmbH financial estimates
Financial estimateRevenue estimate
Valuation estimate
REFU Elektronik GmbH leadership team
Management profileNumber of profiles
Profiles3 records
REFU Elektronik GmbH subsidiaries and ownership
Company hierarchySubsidiaries1 record
REFU Elektronik GmbH funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
REFU Elektronik GmbH M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about REFU Elektronik GmbH
What does REFU Elektronik GmbH do?
REFU Elektronik GmbH manufactures solar string inverters under the REFUsol brand (ranging from 20kW to 360kW), hybrid inverters (REFUhyb), battery storage solutions (REFUbat, REFUstore), and complementary monitoring/control hardware and software (REFUlink gateway, REFUview cloud platform, REFUlog app) for utility-scale, commercial and industrial photovoltaic installations. The company produces the inverters at its 12,000 sqm facility in Érd, Hungary, with R&D in Pfullingen, Germany, and Seville, Spain.
Is REFU Elektronik GmbH a public or private company?
REFU Elektronik GmbH is a private company. It is classified as corporate owned and is currently operating.
When was REFU Elektronik GmbH founded?
REFU Elektronik GmbH was founded in 1965. It employs 101 to 250 people.
Where is REFU Elektronik GmbH based?
REFU Elektronik GmbH is headquartered in Pfullingen, Germany, in the Europe region.
How does REFU Elektronik GmbH make money?
Five revenue lines are on record. Solar Inverter Hardware Sales are the primary driver. The others are energy Storage Systems, monitoring Software & Cloud Services, service & Support and repowering Solutions.
Does REFU Elektronik GmbH have an API?
No public API is recorded for REFU Elektronik GmbH.
What industry is REFU Elektronik GmbH in?
REFU Elektronik GmbH's product category is Solar Power Electronics. Its primary akta.pro industry code is EUAMABAE, Solar Inverters, Power Electronics & MLPE (String/Central Inverters, Optimizers, Microinverters), with a secondary code of EUAMAHAB, Solar Inverters, Power Optimizers & MLPE Manufacturing. Its NAICS code is 335311 and its SIC code is 3612.