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RETTEW

RETTEW

Lancaster, PA
Year Founded: 1969
rettew.com
Total Kilowatts Installed Since Founded: 18,616

RETTEW is a family of companies dedicated to rethinking norms and driving change. We provide a diverse range of services to meet the growing energy needs of our clients and communities. RETTEW is growing rapidly across the U.S. to better serve the renewable energy market with EPC services for C&I solar, utility solar, floating solar, and battery energy storage systems (BESS) solutions. Vertically integrated to provide expertise in engineering, design, permitting, construction, and operations, RETTEW’s dedicated professionals are equipped to navigate challenging regulatory and economic constraints. We look forward to collaborating with owners and developers to drive a successful project.

2023
Rank #154  ·  2023 List  ·  2022 Installation Data
C&I · EPC
10,684
2022 Installation Data
View 2022 Installation Data by State
New Jersey 8,915
Michigan 1,769
View 2023 contractor list →
2022
Rank #178  ·  2022 List  ·  2021 Installation Data
C&I · EPC · Storage: 712 kWh
7,510
2021 Installation Data
View 2021 Installation Data by State
New Jersey 3,835
Pennsylvania 3,674
View 2022 contractor list →
2021
Rank #395  ·  2021 List  ·  2020 Installation Data
C&I · EPC
420
2020 Installation Data
View 2020 Installation Data by State
Pennsylvania 420
View 2021 contractor list →
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  • Home
  • Top Solar Contractors
  • Articles
    • Most Recent Posts
    • News
      • Latest News Items
      • SPW State News Hub
      • IRA/OBBBA coverage
      • Solar tariffs
      • U.S. manufacturing updates
    • Featured
      • Latest Feature Stories
      • Benchmarking U.S. Solar Manufacturing
      • SPW’s Rising Stars
      • Trends in Solar
      • The Solar Explorer
  • Policy
    • Latest policy headlines
    • IRA/OBBBA Coverage
    • Tariffs and Court Cases
  • Markets
    • Residential
    • Commercial
    • Community Solar
    • Utility
    • Storage
  • Products
    • 2026 Top Products application
    • Winners of SPW’s 2025 Top Products
    • Batteries and Storage
    • Electric Vehicle (EV)
    • Inverters
      • U.S. solar inverter manufacturers
    • Racking and Mounting
      • U.S. solar mounting manufacturers
    • Software
    • Solar Panels
      • U.S. solar panel manufacturers
  • Resources
    • About SPW
    • Digital Issues
    • Event Coverage
    • Podcasts
    • Product Manufacturing Locations
      • U.S. solar inverter manufacturers
      • U.S. solar mounting manufacturers
      • U.S. solar panel manufacturers
    • Solar Classrooms
    • Suppliers
    • Videos
    • Views
    • Voices
    • Webinars / Digital Events
    • Whitepapers
  • 2026 Leadership
    • 2025 Winners
    • 2024 Winners
    • 2023 Winners
    • 2022 Winners
  • Advertise
  • Subscribe