Solar Panel Installers in Saint Louis, MO

Astrawatt Solar is a full-service solar design-build company founded in 2008 and headquartered in Kansas City, Missouri. Astrawatt provides residential and commercial solar photovoltaic systems, battery storage, EV charging stations, smart panels, and portable power solutions, and offers in-house engineering, permitting, utility interconnection, installation, financing, incentives support, and ongoing operations & maintenance with production guarantees. The company emphasizes a customer-first, vertically integrated approach to make solar accessible and reliable, and serves customers across multiple states including Missouri, Kansas, Texas, Illinois, Oklahoma, Tennessee, North Carolina, Georgia, Florida and Puerto Rico (source: Astrawatt).

ECOcentrix is a family-owned St. Louis–based construction and energy solutions firm founded in 2011 that focuses on building science–driven roofing, general contracting, and solar energy systems for residential, multifamily, and commercial properties; ECOcentrix provides complimentary energy assessments, custom solar design and installation (including Tesla Powerwall and EV charger services), residential radon testing, commercial energy audits, and full-service roofing and construction management while emphasizing transparency, integrity, measurable energy savings, and a white-glove, science-first approach to improving building performance.

EFS Energy is a St. Louis–based commercial and agricultural solar company that designs, finances, installs, and maintains photovoltaic systems and battery storage for businesses, farms, schools, and municipal clients across Missouri and Illinois. Founded in 2011, EFS Energy provides end-to-end services including site analysis and design, permitting, incentive and tax-credit navigation, construction management, LED lighting upgrades, and ongoing operations & maintenance, with a focus on energy independence, long-term cost savings, technical excellence, and community education.

LTD Solar Consulting is a renewable-energy consulting firm that connects property owners and businesses in Illinois and Missouri with vetted solar installers, advises on system sizing, financing, incentives, and rebates to maximize return on investment, and guides clients through feasibility, contractor selection, and the installation process to ensure compliant, cost-effective solar projects.

proSOLAR is dedicated to delivering top-tier solar solutions to the St. Louis community from its base in Fenton, Missouri. The company helps homeowners and businesses transition to renewable energy with end-to-end services including consultation, customized system design, installation of high-quality panels, and ongoing maintenance and repair. proSOLAR focuses on making solar accessible, improving energy efficiency and cost savings for clients while reducing carbon footprints, and emphasizes a customer-centric approach to ensure reliable service and long-term performance.

Solar City STL is a locally owned St. Louis solar company (based in Sunset Hills) that provides end-to-end solar services for homes and businesses, including consultation, customized system design, installation, maintenance, financing assistance, and free solar power analyses; the company installs Enphase battery storage and microinverters and Silfab solar panels, supports pitched, flat, and ground-mounted systems, and helps customers navigate permits and incentives to maximize savings. (Sources: Solar City STL contact page, Solar City STL homepage)

Solar Luxury LLC is a St. Louis–based solar contractor (operating since 2014) that designs, installs, repairs, and services custom solar and battery systems for residential, agricultural, commercial, RV/camper, and off-grid applications. Solar Luxury LLC focuses on creating independent power solutions and solar generators that reduce reliance on utilities, offers system removal/reinstallation and parking-lot/sign lighting, provides tech support and on-site service from its Midland Boulevard location, and emphasizes tailored system design and technology development to match each customer’s needs and budget.

StraightUp Solar is a Certified B Corporation and full-service, turn-key solar EPC and installation company serving Illinois and Missouri from its St. Louis headquarters. StraightUp Solar designs, engineers, installs, and maintains residential and commercial solar photovoltaic systems and provides battery storage, smart electrical panels, EV charging stations, financing support, permitting and incentive navigation, and long-term operations & maintenance and warranty services. The company has completed thousands of installations since 2006, employs many NABCEP-certified professionals, and prioritizes community impact, sustainability, and dependable long-term performance.

Sun Solar is a Midwest-focused solar energy company headquartered in Springfield, Missouri, providing residential and commercial solar solutions across Missouri, Kansas, and Illinois. Sun Solar offers end-to-end services including system design, permitting, installation, electrification, and ongoing service, along with battery backup, Tesla Solar Roof installations, and in-house financing options. Founded in 2012 by Caleb Arthur, the company emphasizes making renewable energy accessible and affordable, pairs solar production with energy-efficiency audits through its Smart Energy Solutions division, and backs installations with extended 30-year warranties to ensure long-term performance and customer confidence.

SunKey Solar is a St. Louis–area solar installation and energy-management company that provides professional solar panel installation, energy management services, and free consultations for residential and commercial customers; SunKey Solar focuses on helping customers reduce energy costs with renewable solar solutions, offers local consultations and referral incentives, and is listed publicly with a Creve Coeur/Olive Blvd area presence and a local phone contact for inquiries.