What Stone Pine does

Stone Pine S.r.l. is an Italian photovoltaic system integrator headquartered in Imola (Bologna), founded in 2015 as the residential and commercial PV arm of Gruppo Combigas, a diversified Faenza-based holding company established in 1984 with over 100 employees. The company designs, sells, and installs grid-connected photovoltaic systems for two primary segments: residential (privati) homeowners seeking to reduce electricity costs and gain energy independence, and business (aziende) customers seeking energy efficiency and ESG/sustainability outcomes. For the business segment, Stone Pine draws on Enwe S.r.l., the in-house Energy Service Company (ESCo) within Gruppo Combigas, to deliver end-to-end energy efficiency projects including feasibility analysis, design, financing solutions, and installation.

Stone Pine's technical stack centers on premium-tier third-party components: SunPower Maxeon monocrystalline silicon panels (Maxeon 3 at 425 Wp and Maxeon 6 AC with integrated Enphase IQ7 microinverters, up to 22.8% efficiency, 40-year warranty), Tesla Powerwall 3 battery storage (13.5 kWh capacity, 11.04 kW continuous power, integrated inverter, 10-year warranty), and Fronius/SolarEdge inverter technology. The company offers complementary residential technologies including electric vehicle charging stations and heat pumps, and provides ongoing in-house maintenance services from its Emilia-Romagna headquarters. As of the latest data, Stone Pine has installed over 2,500 photovoltaic plants cumulatively, over 1,100 Tesla Powerwall storage systems since 2015 (when it became the first certified Powerwall installer in Italy), and is certified as SunPower Premium Partner, Tesla Energy Certified Installer, and SolarEdge Specialist.

The business model combines direct sales-led go-to-market (website/phone inquiries, on-site technical surveys, quote-based pricing) with a national channel of certified installation partners who handle field installations and O&M under subcontracting. Revenue streams include one-time PV system sales and installation, hardware sales of battery storage and EV chargers, professional services through Enwe, and recurring maintenance contracts. Pricing varies by kWp rating and configuration (e.g., 3 kWp PV from approximately €4,900-€6,000; 6 kWp with 10 kWh storage from approximately €14,700-€17,300), with customers leveraging Italian fiscal incentives including the 50% IRPEF tax deduction recoverable over 10 years and reduced 10% VAT. Distribution is exclusively domestic (Italy), with marketing executed through owned digital properties (website, blog/SEO), organic social channels (Facebook, Instagram, LinkedIn), and email newsletter.

Name

Stone Pine

Legal name

STONE PINE s.r.l.

Website

https://stonepine.it

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

11–50 employees

Short description

Stone Pine is an Italian photovoltaic system integrator serving residential homeowners and business customers nationwide. Founded in 2015 as part of Gruppo Combigas, it designs, installs, and services premium-tier solar PV systems with battery storage and EV charging infrastructure across Italy.

Ownership category

akta.pro rank

Product category

Solar PV Installation & Energy Storage Services

NAICS

Solar Electric Power Generation (221114)

SIC

Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Solar Roofing & Roof-Mounted PV Systems (IMADAFAO)

akta.pro secondary industry

Solar Balance-of-System Components (Cables, Combiner Boxes, Switchgear, Transformers) (EUAMABAG)

Keywords

• Photovoltaic installation services
• Solar panel systems
• Battery energy storage
• EV charging stations
• Renewable energy services

Headquarters

HQ city

Faenza

HQ country

Italy

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Photovoltaic System Sales and Installation: Stone Pine commercializes, designs, and installs photovoltaic systems for both residential and business customers. Revenue is generated through the sale and installation of complete PV systems including panels, inverters, mounting hardware, and wiring. Pricing is quote-based and varies by system size and configuration.
2. Battery Energy Storage Systems (BESS) Sales and Installation: Sale and installation of Tesla Powerwall battery storage systems, both as part of new PV installations and as retrofits for existing systems. Also includes integration of BESS for commercial and industrial customers via Enwe.
3. Energy Efficiency Services for Business: Through the group company Enwe (Energy Service Company), Stone Pine delivers comprehensive energy efficiency projects for commercial and industrial customers including energy audits, renewable energy project development, and ongoing optimization services.
4. EV Charging Infrastructure: Sale and installation of electric vehicle charging stations (colonnine di ricarica) for both residential and business customers, complementing PV and storage offerings.
5. Heat Pump Systems: On the residential segment, Stone Pine has expanded its offering to include heat pumps (pompe di calore) alongside photovoltaic and storage solutions.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Stone Pine commercializes, designs, and installs photovoltaic systems with integrated battery energy storage (Tesla Powerwall) for residential and commercial customers across Italy. The portfolio spans SunPower Maxeon PV panels (Maxeon 3 425Wp and Maxeon 6 AC with Enphase microinverters), Tesla Powerwall battery storage, Fronius and SolarEdge inverters, plus complementary EV charging stations and heat pumps. Services include site assessment, permitting (ENEA, GSE), certified installation, grid connection, and ongoing maintenance.

Product overview

Stone Pine operates as a residential and commercial photovoltaic and energy storage systems integrator, offering a portfolio of solar panels, battery storage, and complementary technologies. The core product portfolio centers on SunPower Maxeon solar panels (Maxeon 3 at 425Wp and Maxeon 6 AC with integrated microinverters) and Tesla Powerwall battery systems (Powerwall 3 and Powerwall 2), complemented by Fronius inverters. The company provides end-to-end services including custom system design, professional installation, permit handling (ENEA and GSE), and ongoing maintenance with in-house after-sales support. For the residential segment, offerings include photovoltaic systems, energy storage, electric vehicle charging stations, and heat pumps. The commercial segment receives complete energy efficiency solutions including photovoltaic installations, charging infrastructure, and Energy Service Company (ESCO) services through group company Enwe.

Differentiator

Problem solved

Functional benefit

Products and services

• Tesla Powerwall 3 Home Battery Storage All-in-one home battery storage system with integrated inverter, 13.5 kWh capacity, 11.04 kW continuous power, built-in backup capability, IP67 weather resistance, and real-time monitoring via Tesla app. Sold and certified-installed by Stone Pine for residential and small commercial customers.
• SunPower Maxeon 3 - 425Wp Solar Panel Monocrystalline silicon photovoltaic panel with 425 Wp output per module, up to 40-year warranty covering power, product, and labor, and guaranteed 88.3% of rated power output at year 40. Sold and installed by Stone Pine under its SunPower Premium Partner status.
• SunPower Maxeon 6 AC Solar Panel with Enphase IQ7 Microinverter Solar panel with integrated Enphase IQ7 microinverter enabling per-panel independent operation and MPPT, up to 22.8% efficiency, 410-475 W power output range, 40-year panel warranty, 25-year microinverter warranty, and panel-level smart monitoring. Designed for performance under partial shading and low-light conditions.
• Residential Photovoltaic System Installation Services Complete turnkey installation services for residential photovoltaic systems, including free consultation, on-site technical survey, custom system design, ENEA and GSE permitting, professional certified installation, and grid connection. Includes quote-based pricing and assistance with Italian fiscal incentives (50% IRPEF deduction, 10% VAT).
• Battery Storage System Installation Services Installation and configuration services for home battery storage systems (Tesla Powerwall), including consumption analysis, custom storage design, system compatibility verification, certified installation, and ongoing after-sales support managed from Stone Pine's headquarters.
• Commercial & Industrial Photovoltaic and Energy Efficiency Solutions Large-scale photovoltaic and energy efficiency solutions for commercial and industrial customers, including feasibility analysis, design, financing, EV charging infrastructure, battery storage, and assistance with government incentive programs (FER, Credito d'Imposta, Fondo Energia, PNRR). Delivered end-to-end through group company Enwe S.r.l.
• Electric Vehicle Charging Stations (Colonnine di Ricarica) Home and commercial electric vehicle charging stations sold and installed by Stone Pine, enabling EV charging powered by on-site solar generation. Complement to PV and battery storage systems.
• Residential Heat Pump Systems (Pompe di Calore) Heat pump systems for residential heating and cooling, sold and installed by Stone Pine to complement photovoltaic installations for complete home energy solutions.
• Photovoltaic Maintenance and After-Sales Services Annual and corrective maintenance services for installed PV systems, including panel cleaning, visual inspection, performance monitoring, inverter checks, and component repair or replacement. Post-sale technical assistance handled by Stone Pine's in-house technical team.

Quantifiable outcome

• Up to 90% reduction in electricity costs with PV + storage systems
• +6 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

Integration6 records

Feature4 records

Partnerships

Five partnerships are on record, tiered core and minor.

• SunPowercoreTechnology or Integration · 1 January 2015Stone Pine is a SunPower Premium Partner, distributing and installing SunPower Maxeon 3 (425Wp) and Maxeon 6 AC (with Enphase microinverter) photovoltaic panels. SunPower panels carry a 40-year warranty on power and product. Stone Pine's history with SunPower traces to 2000 through the founding group's Solar Solution entity, which was subsequently acquired by SunPower.
• Tesla EnergycoreTechnology or Integration · 1 January 2015Stone Pine is a Tesla Certified Installer and has installed over 1,100 Tesla Powerwall units since becoming the first certified Powerwall partner in Italy in 2015. The partnership involves sale and certified installation of Tesla Powerwall 2 and Powerwall 3 battery storage systems, with Tesla providing product warranties and promotional refunds of up to €900 per unit.
• Enwe S.r.l.coreStrategic or Co-development PartnerEnwe S.r.l. is the Energy Service Company (ESCo) within Gruppo Combigas. Stone Pine leverages Enwe to deliver energy efficiency solutions and renewable energy project development for business customers, providing comprehensive turnkey services from diagnosis through installation.
• MCA Impianti ElettriciminorChannel Partner/ Reseller/ DistributorMCA Impianti Elettrici is a certified installation partner of Stone Pine since 2015. The partnership involves sub-contracting for PV, storage, and EV charging station installations in their territory.
• Gruppo CombigascoreOthersGruppo Combigas is the parent holding company of Stone Pine. Founded in 1984 in Faenza, the group operates in petroleum trading and wholesale, and has invested in renewable energy since 2000. Gruppo Combigas comprises Combigas Srl (energy trading), Enwe Srl (energy efficiency), and Siron Srl (petroleum retail with 11 service stations).

Scale indicators11 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• A2A S.p.A. Italian multi-utility operating across Lombardy and broader Italy in electricity, heat, gas, waste, and renewables including PV installations. Comparable to Stone Pine on commercial and industrial energy efficiency and renewable generation, with the diversification and scale of a public multi-utility.
• Plenitude (Eni): Eni's integrated energy subsidiary combining retail electricity and gas, renewables generation, BESS, EV charging (Be Charge), and home services. Comparable to Stone Pine on the multi-product home energy stack and cross-selling motion, but with the scale and balance sheet of a major oil major.
• Tesla Energy: Tesla's energy business — Powerwall, Solar Roof, and Megapack. Direct supplier to Stone Pine but increasingly competing via Tesla's own installer network and direct-to-consumer channels; key competitor for residential PV + storage customers in Italy and globally.
• Edison S.p.A. Major Italian energy company with a residential and commercial portfolio spanning electricity supply, PV and efficiency solutions. Comparable to Stone Pine on residential energy services and CER/renewables programs but with much larger scale and utility backing.
• Sorgenia S.p.A. Italian independent energy retailer offering electricity and gas plus residential PV and storage solutions. Overlaps with Stone Pine on residential rooftop PV and battery integration, positioning as a competitive Italian alternative serving similar customer segments.
• Enel Energia: Italy's dominant integrated utility serving residential and commercial customers with electricity, PV installations, storage, EV charging, and energy efficiency services. Overlaps with Stone Pine on residential PV and energy services but operates as a much larger incumbent with regulated earnings stability.

Others

• Maxeon Solar Technologies: Spun off from SunPower, Maxeon manufactures the Maxeon line of high-efficiency back-contact solar panels that Stone Pine installs as a Premium Partner. Comparable as the upstream panel supplier whose technology roadmap directly shapes Stone Pine's product differentiation and warranty positioning.
• Enphase Energy: Global microinverter and home battery (IQ Battery) supplier that integrates with installers like Stone Pine. Enphase's expansion into full home energy systems (PV + battery) and installer ecosystem makes it both a key technology partner and a partial upstream competitor.

Direct peers

• Sunrun: Largest US residential solar and battery storage installer with a sales-led, installation-and-financing business model. Directly comparable to Stone Pine on residential PV + storage integration, multi-vendor premium tier approach (including Tesla Powerwall), and reliance on customer acquisition and incentive leverage for unit economics.
• Greenvolt: European distributed-generation and utility-scale renewables developer with installer operations in Italy, Iberia, France, Poland and Romania. Overlaps with Stone Pine on European rooftop and DG PV deployment, BESS integration, and cross-country execution, though at larger scale and broader geographies.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/stone.pine.smart.energy.system
• LinkedInlinkedin.com/company/stone-pine
• Instagraminstagram.com/stone.pine.energy
• Xx.com/stonepine_it

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries3 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 Stone Pine