What Riello Solartech does

Riello Solartech is a photovoltaic inverter and energy storage manufacturer operating as a dedicated division of RPS S.p.A. within the Riello Elettronica Group, an Italian diversified industrial conglomerate founded by Pierantonio Riello that generates over €400M in annual revenue and employs more than 1,250 people across 30 subsidiaries in 80+ countries. The company designs, produces, and services a comprehensive PV inverter portfolio spanning single-phase string inverters for residential use (RS Monofase, 1.5-6.0 kW), three-phase string inverters for commercial and industrial applications (RS Trifase, 6.0-30.0 kW; Sirio ES, 50-110 kW), hybrid inverters with integrated battery storage (RS Hybrid Monofase and RS Hybrid Trifase), centralized inverters for large-scale plants (Sirio Trifase, 64-800 kW; Sirio Central Station, 500-1000 kW), and Hybrid Battery Storage systems (10-800 kW). Hardware is complemented by LFP battery modules (RS Batlio 5500, 5.5 kWh scalable to 44 kWh) and a proprietary software ecosystem spanning the RS Connect, Riello PV, and RS Monitoring mobile applications, the Cloud Inverter and SunGuard web portals, the free PV Configurator 4.0 sizing tool, and accessories such as dataloggers, communication cards, sensors, and Modbus converters.

The core technology rests on dual-MPPT power optimization, natural air cooling for residential units, fan-cooled industrial designs, IP65/IP66 outdoor-rated enclosures, AC Coupling for retrofit storage integration with existing PV installations, and integrated UPS functionality in HBS systems. Key technical performance metrics include up to 98.0% inverter efficiency (RS Trifase), up to 97.4% European efficiency (RS Hybrid Trifase), and up to 150% DC overload capacity in hybrid models. The business model is predominantly hardware sales through a network of seven named Italian regional agencies and certified installer partners, supplemented by direct enterprise sales for commercial, industrial, and utility-scale projects; international distribution leverages the Riello Elettronica Group's global subsidiary network. Revenue is generated from one-time inverter and battery purchases with potential recurring elements from advanced monitoring and remote maintenance services for commercial and industrial fleet customers. Target segments are residential homeowners, C&I businesses across food and beverage, hospitality, manufacturing, logistics, and agriculture, and utility-scale developers plus energy community and microgrid operators.

Name

Riello Solartech

Legal name

RPS S.p.A.

Website

https://riello-solartech.it

Company type

Private

Operating status

Operating

Headcount range

51–100 employees

Short description

Riello Solartech, a division of Italy's Riello Elettronica Group, manufactures photovoltaic inverters and hybrid battery storage systems for residential, commercial, industrial, and utility-scale solar applications, distributed primarily through Italian regional agencies and installer partners.

Ownership category

akta.pro rank

Product category

Photovoltaic Inverters

NAICS

Power, Distribution, and Specialty Transformer Manufacturing (335311)

SIC

Power, Distribution & Specialty Transformers (3612), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

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

akta.pro secondary industries

PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC), Solar Inverters, Power Optimizers & MLPE Manufacturing (EUAMAHAB), Distributed & Commercial Renewable O&M (Rooftop Solar, C&I Wind, Small Hydro) (EUAMAGAB)

Keywords

• Photovoltaic inverters
• Solar inverters
• Energy storage systems
• Hybrid inverters
• Centralized solar stations

Headquarters

HQ city

Legnago

HQ country

Italy

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Photovoltaic Inverters (String Inverters): Riello Solartech generates revenue primarily from the sale of photovoltaic string inverters across residential, commercial, and industrial power ratings. Products include RS Monofase (1.5-6.0 kW), RS Trifase (6.0-30.0 kW), and Sirio ES (50-110 kW) models. These are sold as one-time hardware purchases through dealer and distributor channels.
2. Hybrid Inverters with Integrated Storage: RS Hybrid Monofase and RS Hybrid Trifase inverters with integrated battery management and backup functionality are sold as bundled hardware packages, often paired with RS Batlio 5500 battery modules. Revenue is generated from the inverter-battery system sale.
3. Battery Storage Systems: RS Batlio 5500 LFP battery modules (5.5 kWh each) are sold separately and in bundles with hybrid inverters. Configurations range from 2 to 8 modules (up to 44 kWh capacity). Hybrid Battery Storage (HBS) systems (10-800 kW) target large commercial and utility-scale installations.
4. Central Inverters for Utility-Scale: Sirio Trifase (64-800 kW) and Sirio Central Station (500-1000 kW) are large-scale central inverters and modular substation solutions for solar farms and utility-scale PV plants. These are sold as high-value industrial hardware.
5. Monitoring Software and Platforms: Free monitoring apps (RS Connect, Riello PV, RS Monitoring) are provided to support hardware sales. Additional revenue may come from advanced monitoring platform features, data services, and remote maintenance contracts for commercial/industrial fleet management.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels6 records

Core offering

Riello Solartech (operating through RPS S.p.A.) designs, manufactures and sells photovoltaic inverters and energy storage solutions, including single-phase and three-phase string inverters, hybrid inverters with battery storage, three-phase centralized string inverters, modular central stations for utility-scale plants, and LFP battery modules. Offerings span residential rooftop (1 kW class), commercial and industrial (kW–MW class) and utility-scale (multi-MW) segments, sold primarily through a network of certified installers and distributors with direct field sales for larger projects.

Product overview

Riello Solartech, a division of RPS S.p.A. (Riello Elettronica Group), offers a comprehensive portfolio of photovoltaic inverters and energy storage solutions spanning residential, commercial, and utility-scale applications. The product range spans from compact single-phase inverters (1.5-6.0 kW) for residential use, through three-phase string inverters (6.0-30.0 kW) for commercial installations, to large centralized inverters (up to 800 kW) for utility-scale solar farms. Hybrid storage-capable models integrate battery systems for both single-phase (3.6-6.0 kW) and three-phase (5-30 kW) applications, complemented by the RS Batlio 5500 LFP battery modules (5.5 kWh each, scalable to 44 kWh). An ecosystem of monitoring apps (RS Connect, Riello PV, RS Monitoring), web portals (Cloud Inverter, SunGuard), configuration tools, communication interfaces (Ethernet/Wi-Fi/RS485), and accessories (dataloggers, sensors, string boxes) supports the hardware portfolio. The architecture is modular, allowing customers to combine inverters with appropriate storage, monitoring, and accessories based on installation scale and requirements.

Differentiator

Problem solved

Functional benefit

Brands

• RS Monofase: Single-phase string inverters for residential applications, powers from 1.5 to 6.0 kW
• RS Trifase
• RS Hybrid Monofase
• RS Hybrid Trifase
• Sirio ES
• Sirio Trifase
• Hybrid Battery Storage (HBS)
• Sirio Central Station
• RS Batlio 5500

Quantifiable outcome

• Inverter efficiency up to 98% (RS Trifase)
• +6 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature8 records

Partnerships

Five partnerships are on record, tiered minor.

• KEY 2026 - The Energy Transition Expo (Rimini Expo Center)minorOthers · 4 March 2026Riello Solartech is an exhibitor and participant at KEY 2026, scheduled for March 4-6, 2026 at Rimini Expo Center. KEY is Italy's largest energy transition trade fair, where Riello Solartech engages with installers, distributors, and industry professionals to showcase its inverter and storage product range.
• Strano In Expo 2025 (Sicily)minorOthers · 1 April 2025Riello Solartech participated in Strano In Expo 2025 (April 15-17), a reference event in Sicily for innovation, energy, security, and advanced technologies.
• KEY 2025 - The Energy Transition Expo (Rimini Expo Center)minorOthers · 5 March 2025Riello Solartech was an exhibitor at KEY 2025 (March 5-7, 2025, Rimini Expo Center, Stand 120, Hall D3). The company showcased its full range of photovoltaic inverters and energy storage solutions at Italy's major renewable energy trade fair.
• TuttoNormel Technical Meetings 2025minorOthers · 1 March 2025Riello Solartech participated as a sponsor in the 2025 TuttoNormel Technical Meetings, an annual series of itinerant events across Italy held between March and May 2025, focused on electrical standards and photovoltaic regulations.
• K.EY 2024 - Rimini ExpominorOthers · 1 March 2024Riello Solartech exhibited at K.EY 2024 in Rimini, which was a record edition with a 41% increase in total attendance compared to 2023. The event highlighted the transition toward a carbon-neutral economy.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Sungrow: Chinese global leader in PV inverters spanning residential string, C&I and utility-scale central inverters, plus hybrid/storage solutions. Highly comparable to Riello Solartech across the full residential-to-utility product range and increasingly competing in Europe.
• Huawei Digital Power (FusionSolar): Major global PV inverter manufacturer offering residential, commercial and utility-scale string inverters, with growing energy storage integration. Competes head-to-head with Riello Solartech in European C&I and utility-scale tenders.
• Fronius International: Austrian inverter manufacturer with strong presence in residential and commercial PV including hybrid solutions ( Fronius Symo, Fronius Primo GEN24 Plus). Comparable in target markets, hybrid architecture and EMEA-centric distribution.
• SMA Solar Technology: German inverter manufacturer with deep European roots across residential, commercial and utility-scale segments — including hybrid inverters and battery inverters. Closest European-headquartered comparable to Riello Solartech in scope and positioning.
• GoodWe: Chinese inverter manufacturer covering residential hybrid, C&I string and utility-scale segments. Direct competitor to Riello Solartech across multiple price tiers in European markets.
• Enphase Energy: US-based microinverter and battery (IQ Battery) manufacturer with very strong residential PV presence in Europe. Competes with Riello Solartech in the residential segment, though at a more distributed architectural level.
• FIMER: Italian-headquartered inverter manufacturer (acquired ABB's solar inverter business) offering string and central inverters plus storage for residential, C&I and utility. Direct competitor to Riello Solartech in the Italian home market and broader European segment.
• KOSTAL Solar Electric: German inverter manufacturer with string and hybrid inverters (PLENTICORE plus) plus battery solutions for residential and C&I. Closely comparable European mid-market inverter peer to Riello Solartech in technology and customer segments.
• SolarEdge Technologies: Israeli manufacturer of power optimisers and inverters with strong residential and small-commercial footprint across Europe. Competitor in distributed solar inverter architectures where Riello Solartech competes via its RS Monofase/Trifase range.
• Growatt: Chinese inverter and storage manufacturer with residential, C&I and small utility offerings plus battery storage. Competes with Riello Solartech on price in residential and small-commercial tiers in Europe.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/riellosolartech
• Facebookfacebook.com/riellosolartech
• LinkedInlinkedin.com/company/riello-solartech

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 Riello Solartech