OnSite Solar
- Company typePrivate
- Founded1998
- HeadquartersLiverpool, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
OnSite Solar firmographics
Firmographics- Name
- OnSite Solar
- Legal name
- OnSite Solar, LLC
- Website
- https://onsitesolar.com
- Company type
- Private
- Founded year
- 1998
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Ownership category
- akta.pro rank
OnSite Solar industry classification
Industry- Product category
- Solar EPC and Construction Services
- akta.pro primary industry
- Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)
- akta.pro secondary industries
- Solar PV Power Plant EPC (Utility-Scale) (EUAEAAAG), Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ)
Keywords
Where OnSite Solar is headquartered
LocationHeadquarters
- HQ city
- Liverpool
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
OnSite Solar business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Supply Chain, Operations, Technology or R&D
Revenue model
- EPC Services: Turnkey Engineering, Procurement, and Construction services for DG and utility-scale solar projects. Revenue is generated through project-based contracts covering full electrical, civil, and structural design, component procurement, construction management, field installation, commissioning, QA/QC, and documentation.
- Battery Energy Storage Systems (BESS): Design and integration of commercial BESS solutions for energy resilience, demand charge reduction, and energy optimization. Scalable storage solutions from 100 kWh to multi-MWh, with permitting, compliance, and interconnection support.
- Removal & Reinstallation (R&R): Specialized services for removing, storing, and reinstalling commercial solar systems during roof repairs or replacements. Includes system evaluation, safe removal, expert reinstallation, and testing & commissioning.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels3 records
OnSite Solar product offering
Product offeringCore offering
OnSite Solar is a self-performing Engineering, Procurement, and Construction (EPC) contractor delivering turnkey distributed generation and utility-scale solar PV projects across the Northeast US. The company offers three core service lines: turnkey EPC delivery from design through commissioning, Battery Energy Storage System (BESS) design and integration, and Removal & Reinstallation (R&R) services for commercial solar systems during roof work.
Product overview
OnSite Solar is a leading Engineering, Procurement and Construction (EPC) company providing high-quality services to the Distributed Generation (DG) and Utility Scale solar marketplace. The company operates three core service lines: (1) EPC services offering turnkey solar project delivery from design through commissioning; (2) Battery Energy Storage System (BESS) providing scalable commercial and industrial energy storage solutions; and (3) Removal and Reinstallation (R&R) services for solar systems during roof work. As a self-performing installation contractor, OnSite Solar distinguishes itself through in-house crew capabilities across all sectors of work, supplemented by a subcontractor network. The company serves commercial, industrial, community solar, utility-scale, and public sector markets across the Northeast US.
Differentiator
Problem solved
Functional benefit
Products and services
- Engineering, Procurement, and Construction (EPC) Turnkey EPC services for Distributed Generation (DG) and utility-scale solar projects, providing end-to-end services from initial design to final closeout, including full electrical, civil, and structural design, procurement of tier-1 components, construction management, field installation, and commissioning/QA/QC documentation. Targeted at commercial, industrial, community solar, utility-scale, and public sector customers in the Northeast US.
- Battery Energy Storage System (BESS)
Quantifiable outcome
- Delivered distributed generation solar build in 2017 as company's first major solar project
Companies that use OnSite Solar
Customer profileNamed customers2 records
Segments4 records
Ideal customer profiles4 records
OnSite Solar technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
OnSite Solar partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- LUMI RoboticscoreCollaboration on LUMI Series 3, an AI-powered flexible robot for solar farm construction. The robot improves construction efficiency by offloading heavy lifting and adapting to complex hilly terrain environments. OnSite Solar provides the installation expertise and project delivery while the robot technology accelerates deployment.
Scale indicators9 records
Recent moves5 records
Expansion highlights5 records
OnSite Solar competitors and assessment
Company assessmentBroad incumbents
- Shawmut Design and Construction: Shawmut is a Northeast-based national construction firm with a clean energy and solar practice serving commercial clients. It represents a regional incumbent comparable to OnSite Solar in Northeast focus and C&I customer orientation, though diversified across building construction.
- Blattner Energy (Quanta Services): Blattner Energy, now part of Quanta Services, is one of the largest utility-scale renewable EPC contractors in North America. It competes for the same utility-scale solar projects as OnSite Solar at the upper end of the project-size spectrum.
- Mortenson Construction: Mortenson is a large, diversified EPC contractor with a top-tier renewable energy practice delivering utility-scale solar and wind across the US. It is comparable as an established incumbent in solar EPC, with significantly greater scale and balance sheet than OnSite Solar.
- McCarthy Building Companies: McCarthy is a diversified national contractor with a renewable energy practice delivering utility-scale solar EPC projects. It represents a broader incumbent comparable to OnSite Solar in core service line but with substantially greater scale, geographic reach, and balance sheet.
- EDF Renewables North America: EDF Renewables is a large renewable energy developer and operator with EPC capabilities. It is a competitor-adjacent comparable in utility-scale solar and storage, though primarily acting as a developer/asset owner rather than a pure EPC contractor.
Direct peers
- Trinity Solar: Trinity Solar is a Northeast-based solar installer with a strong commercial and residential footprint across the Mid-Atlantic and New England. It is the most direct geographic and service-line comparable to OnSite Solar given its focus on commercial/industrial and community solar in overlapping Northeast markets.
- Swinerton Renewable Energy: Swinerton Renewable Energy is a national EPC contractor focused on utility-scale and community solar. It is comparable to OnSite Solar in core service offering (self-perform solar EPC) but operates at meaningfully larger scale with a broader geographic footprint.
- CS Energy: CS Energy is a self-perform solar EPC contractor focused on utility-scale and C&I projects in the Eastern US. It is directly comparable to OnSite Solar in service model, self-perform approach, and target customer segments.
- REC Solar: REC Solar (a SunPower company) is a commercial solar EPC and O&M provider with multi-state capabilities. It is closely comparable in business model — turnkey solar EPC for C&I customers — and a frequent bidder against regional installers like OnSite Solar.
- Borrego Solar: Borrego Solar is a commercial and utility-scale solar EPC contractor with self-perform capabilities and storage expertise. It competes head-to-head with OnSite Solar for mid-market C&I and community solar EPC contracts, particularly in the Eastern US.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
OnSite Solar social profiles
Digital presenceOnSite Solar financial estimates
Financial estimateRevenue estimate
Valuation estimate
OnSite Solar leadership team
Management profileNumber of profiles
Profiles5 records
OnSite Solar funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
OnSite Solar 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 OnSite Solar
What does OnSite Solar do?
OnSite Solar is a self-performing Engineering, Procurement, and Construction (EPC) contractor delivering turnkey distributed generation and utility-scale solar PV projects across the Northeast US. The company offers three core service lines: turnkey EPC delivery from design through commissioning, Battery Energy Storage System (BESS) design and integration, and Removal & Reinstallation (R&R) services for commercial solar systems during roof work.
Is OnSite Solar a public or private company?
OnSite Solar is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was OnSite Solar founded?
OnSite Solar was founded in 1998. It employs 51 to 100 people.
Where is OnSite Solar based?
OnSite Solar is headquartered in Liverpool, United States, in the North America region.
How does OnSite Solar make money?
Three revenue lines are on record. EPC Services are the primary driver. The others are battery Energy Storage Systems (BESS) and removal & Reinstallation (R&R).
Who are OnSite Solar's main competitors?
Broad incumbents on record are Shawmut Design and Construction, Blattner Energy (Quanta Services), Mortenson Construction, McCarthy Building Companies and EDF Renewables North America. Direct peers are Trinity Solar, Swinerton Renewable Energy, CS Energy, REC Solar and Borrego Solar.
Does OnSite Solar have an API?
No public API is recorded for OnSite Solar.
What industry is OnSite Solar in?
OnSite Solar's product category is Solar EPC and Construction Services. Its primary akta.pro industry code is EUAMABAB, Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System), with a secondary code of EUAEAAAG, Solar PV Power Plant EPC (Utility-Scale).