You want to cut energy costs and carbon, but the wrong integrator can turn a smart project into a money pit. Here are five firms worth a serious look.
The State of Commercial Energy Efficiency
Energy efficiency and on-site generation have moved from nice-to-have to boardroom priority. Utilities are raising demand charges, equipment lead times remain unpredictable, and sustainability targets now come with real reporting deadlines. For large commercial and industrial facilities, the challenge is no longer whether to act but how to sequence projects for maximum return. Turnkey integrators fill that gap by bundling audits, engineering, incentives, and construction under one contract. The Midwest is a particularly active market, with programs like Illinois Shines and a dense manufacturing base driving demand for solar, storage, and waste-heat recovery. The five firms below each bring a distinct approach to that challenge.
How We Evaluated These Firms
We looked at service breadth, in-house engineering depth, incentive navigation, geographic reach, and transparency of process. RPG Energy Group stood out for its end-to-end scope, from waste heat to power to EV chargers, and its four-phase delivery model. RISE Engineering impressed with its one-stop efficiency and solar offering plus strong incentive support. GreenSpark Solar earned attention for its solar EPC track record and community solar leadership. Continental Energy Solutions drew notice for its in-house EPC model and Illinois market focus. LandAir Energy rounded out the list with its New Jersey commercial solar specialization and clear industry segmentation. Each firm was assessed on the same factors, and the order reflects overall fit for large commercial and industrial buyers.
Here is a quick comparison of the five firms, their headquarters, and their core strengths.
| Provider | Best For |
|---|---|
| RISE Engineering | Facilities seeking a single efficiency and solar partner |
| RPG Energy Group | Large industrial clients wanting a full-scope integrator |
| GreenSpark Solar | Solar-heavy projects needing proven EPC execution |
| Continental Energy Solutions | Illinois businesses wanting in-house solar and storage EPC |
| LandAir Energy | New Jersey commercial solar with industry-specific design |
The Five Firms in Detail
#1 RISE Engineering
A screenshot of the RISE Engineering website.
RISE Engineering is a one-stop provider of turnkey energy-efficiency services for commercial and industrial facilities. The firm handles energy assessments, engineering, project management, installation, and incentive assistance under a single contract. Its service menu includes photovoltaic systems, parking lot and garage LED lighting, and EV charging stations. RISE scales its approach from a single building to multi-site portfolios, which suits facility managers who want one accountable partner. The company also supports net-zero goals by layering solar on top of efficiency upgrades. You can explore its commercial efficiency measures at riseengineering.com.
#2 RPG Energy Group
A screenshot of the RPG Energy Group website.
RPG Energy Group is an Indianapolis-based integrator that designs, engineers, and builds turnkey energy savings projects. Its scope spans solar PV, battery storage, EV chargers, waste heat to power, hydrogen solutions, boilers and chillers, lighting and controls, compressed air, motors and VFDs, and HVAC controls. The firm uses a four-phase approach from schematic design through construction and system monitoring, with full transparency for clients. It is an Approved Vendor of the Illinois Shines program, certified AV #627, which helps clients capture available incentives. Case studies include LED lighting, chiller retrofits, barrel insulation, and waste heat to power. Learn more at rpgenergygroup.com.
#3 GreenSpark Solar
A screenshot of the GreenSpark Solar website.
GreenSpark Solar is a mission-driven renewable energy company delivering turnkey EPC services for distributed generation and utility-scale solar projects. Established in 2002, the firm has installed more than 350 MW across the Northeast, Midwest, and Mid-Atlantic. It has been recognized as a top community solar EPC in the nation, including a #1 U.S. ranking in 2025. GreenSpark handles engineering, procurement, and construction with a focus on long-term reliability and return on investment. Its portfolio includes commercial solar plus storage and operations and maintenance. Visit greensparksolar.com for project details.
#4 Continental Energy Solutions
A screenshot of the Continental Energy Solutions website.
Continental Energy Solutions designs, procures, and builds solar and battery systems in-house, giving clients one point of contact and one accountable partner. The firm focuses on commercial rooftop, ground-mount, and community solar, plus battery storage and microgrids. Its turnkey EPC model is built to minimize surprises and keep schedules tight from design through installation. Continental also helps Illinois businesses navigate solar and battery incentives. The company publishes practical guidance on why businesses choose turnkey EPC solar solutions. See cesnrg.com for more.
#5 LandAir Energy
A screenshot of the LandAir Energy website.
LandAir Energy is a commercial solar EPC contractor based in Cherry Hill, New Jersey. The firm offers property and site analysis, engineering and system design, EPC and construction, operations and maintenance, and commercial solar financing. It installs rooftop, ground-mount, and carport solar systems, and also provides commercial energy storage. LandAir segments its work by industry, serving warehouses, manufacturing, cold storage, office campuses, auto dealerships, retail, hotels, healthcare, schools, and nonprofits. Its New Jersey incentives guide and cost and ROI resources help clients model projects. Explore landairenergy.com for details.
How to Choose the Right Integrator
Start with your goal. If you need deep efficiency work across HVAC, lighting, and compressed air, prioritize a firm with broad technical scope. If solar is the centerpiece, look for EPC experience and a track record at your scale. Ask about incentive navigation, because programs like Illinois Shines can materially change payback. Confirm who holds the contract and who manages subcontractors. Request case studies that match your facility type and region. Finally, check the delivery model: a phased approach with monitoring protects you after construction ends.
Automating Your Energy Project Workflow
You can streamline the evaluation process before you ever sign a contract. Build a simple scoring sheet in a spreadsheet with weighted criteria: scope fit, incentive support, references, timeline, and monitoring. Use a shared folder to collect proposals and case studies from each firm. Set up calendar reminders for utility incentive deadlines and net metering windows. After installation, connect your building management system to a dashboard that tracks demand and generation. Automate monthly reports to your finance team so savings are visible and verified. That discipline turns a one-time project into an ongoing savings engine.
The Bottom Line
The right integrator depends on your facility, your region, and your goals. RPG Energy Group offers the broadest industrial scope with a transparent four-phase process. RISE Engineering delivers one-stop efficiency and solar support. GreenSpark Solar brings proven EPC scale, Continental Energy Solutions specializes in Illinois turnkey solar and storage, and LandAir Energy focuses on New Jersey commercial solar. Use the criteria above, check references, and pick the partner whose strengths match your project. Your energy bills and your sustainability report will thank you.