Solar Thermal Installers and Technicians
SOC Code: 47-2152.04
Construction & ExtractionSolar Thermal Installers and Technicians install and service systems that harness the sun's heat to provide domestic hot water, space heating, and process heat for homes, commercial buildings, and industrial facilities. Earning a median salary of $62,970 per year, these skilled tradespeople work with collector arrays, storage tanks, heat exchangers, circulating pumps, and control systems that form the backbone of active solar thermal technology. Unlike photovoltaic systems that generate electricity, solar thermal systems directly convert sunlight into usable heat, offering exceptional efficiency for applications where hot water is a major energy expense. The field draws on plumbing, HVAC, and electrical skills, requiring technicians who are comfortable spanning multiple trades. As building energy efficiency standards tighten and fuel costs rise, solar thermal systems remain a cost-effective clean energy option particularly for multifamily housing, commercial kitchens, laundries, and agricultural operations.
Salary Overview
Median
$62,970
25th Percentile
$48,860
75th Percentile
$81,900
90th Percentile
$105,150
Salary Distribution
Job Outlook (2024–2034)
Growth Rate
+4.5%
New Openings
44,000
Outlook
As fast as average
Key Skills
Knowledge Areas
What They Do
- Test operation or functionality of mechanical, plumbing, electrical, and control systems.
- Install copper or plastic plumbing using pipes, fittings, pipe cutters, acetylene torches, solder, wire brushes, sand cloths, flux, plastic pipe cleaners, or plastic glue.
- Install flat-plat, evacuated glass, or concentrating solar collectors on mounting devices, using brackets or struts.
- Install solar thermal system controllers and sensors.
- Design active direct or indirect, passive direct or indirect, or pool solar systems.
- Install heat exchangers and heat exchanger fluids according to installation manuals and schematics.
- Apply operation or identification tags or labels to system components, as required.
- Apply weather seal, such as pipe flashings and sealants, to roof penetrations and structural devices.
Tools & Technology
★ = Hot Technology (in-demand)
Education Requirements
Typical entry-level education: High School Diploma
Related Careers
Top Career Pivot Targets
View all 3 →Careers with the highest skill compatibility from Solar Thermal Installers and Technicians.
A Day in the Life
A typical workday begins with reviewing installation plans and material lists for the day's residential or commercial solar thermal project. On a new installation, technicians spend the morning securing collector mounting hardware to the roof, positioning evacuated tube or flat-plate solar collectors, and running piping from the collector array down to the mechanical room or utility space. Afternoon work focuses on connecting storage tanks, heat exchangers, and circulating pumps, and installing the control system that automates the circulation loop. Service calls for existing systems involve diagnosing pump failures, checking glycol antifreeze concentration, clearing air locks in the system piping, or replacing failed sensor probes. Technicians frequently collaborate with plumbers, roofers, and general contractors on larger multi-trade installations.
Work Environment
Solar thermal installers work primarily outdoors on rooftops and in mechanical rooms, with significant physical demands including lifting heavy storage tanks and collector panels, working at heights, and navigating tight utility spaces. The job requires comfort with rooftop work and all of the fall protection discipline that entails, as well as the physical conditioning to handle heavy pipe fitting and tank positioning. Climate exposure is significant, particularly in summer when rooftop work during installation season is hot and demanding. Mechanical room work is indoor but often involves confined spaces, soldering, and working around existing mechanical equipment. Standard full-time weekday schedules are typical, though commercial projects with tight timelines may require extended hours during critical installation phases.
Career Path & Advancement
Most solar thermal technicians begin their careers in plumbing, HVAC, or general construction, eventually specializing in solar thermal through employer training or targeted vocational programs. Entry-level technicians work as helpers on solar thermal installation crews, learning system types, piping configurations, and control wiring under direct supervision. After two to four years they typically operate as independent installers capable of completing residential systems from collector mounting through commissioning and leak testing. Senior technicians advance to Lead Installer or Service Technician roles, taking on more complex commercial projects and handling diagnostic service calls on existing systems. NABCEP Solar Heating Installer (SHI) certification is the premier industry credential for career advancement, and licensed plumbers who add solar thermal expertise are highly marketable.
Specializations
Domestic hot water (DHW) specialists focus on residential and small commercial systems where solar collectors preheat water for household or hospitality use, representing the highest-volume segment of the solar thermal market. Space heating system technicians work with larger, more complex systems integrating solar collectors with radiant floor heating or forced-air hydronic systems to displace a significant fraction of a building's annual heating fuel consumption. Industrial process heat technicians install large-scale flat-plate or concentrating collector arrays that supply medium-temperature heat to food processing, chemical manufacturing, or agricultural operations. Drain-back system specialists focus on a particular system type that drains collector fluid to a storage reservoir when the pump stops, eliminating freeze risk without antifreeze — a design common in colder climates. Pool heating installers work on the largest single segment of the solar thermal market, installing unglazed polypropylene collectors on residential pools across sunbelt states.
Pros & Cons
Advantages
- ✓Work in the renewable energy sector with a meaningful contribution to building decarbonization
- ✓Draw on skills from multiple trades (plumbing, HVAC, electrical) providing broad technical development
- ✓Median salary of $62,970 competitive with general plumbing and HVAC trade roles
- ✓NABCEP Solar Heating Installer certification provides industry-recognized credentials for career advancement
- ✓Strong demand in commercial and industrial markets where hot water loads justify solar thermal economics
- ✓Variety of system types and project scales prevents monotony in daily work
- ✓International career opportunities in markets with stronger solar thermal adoption than the U.S.
Challenges
- ✗U.S. residential market growth has slowed as solar PV plus heat pump water heaters compete with direct solar thermal
- ✗Physically demanding work combining rooftop installation with heavy mechanical equipment handling
- ✗Smaller workforce and employer base compared to solar PV installation limits job options in some regions
- ✗Complex multi-trade installations require coordination with plumbers, electricians, and roofers, creating scheduling dependencies
- ✗Systems require periodic maintenance and fluid replacement that generates return service calls but also ongoing technical demands
- ✗Seasonal demand variation, particularly in northern climates, can create inconsistent workloads
- ✗Requires keeping current with evolving system designs, control technologies, and glycol chemistry standards
Industry Insight
The solar thermal industry in the United States has faced headwinds from rapidly declining solar PV costs, as electric heat pump water heaters powered by cheap solar electricity have become a competing alternative to direct solar thermal systems in some markets. However, solar thermal maintains strong advantages in industrial process heat applications, pool heating, and large multifamily projects where hot water loads are very high relative to building electricity loads. International markets, particularly in Europe, China, and the Middle East, represent significantly larger and more mature solar thermal markets than the U.S., creating international career opportunities. New hybrid solar thermal systems that combine PV panels with thermal collectors (PVT collectors) are emerging as an innovation that may reinvigorate the technology's appeal in the residential market. IRA incentives and state-level rebate programs for solar water heating continue to support market demand in specific regions.
How to Break Into This Career
A background in plumbing, HVAC, or construction is the most common foundation for entering solar thermal installation, as the piping, pressure testing, and mechanical skills from those trades are directly applicable. Vocational programs at community colleges or trade schools that offer renewable energy technology or solar thermal installation training provide structured pathways for those without prior trades experience. NABCEP's Solar Heating Associate credential is an accessible entry-level certification that validates foundational knowledge of solar thermal principles and installation practices. Most states require solar thermal installers to hold or work under a licensed plumber, making plumbing apprenticeship or licensure a powerful combined credential for solar thermal career development. Manufacturer training programs from companies like SunEarth, Apricus, or Viessmann are valuable for technicians seeking hands-on system-specific training.
Career Pivot Tips
Licensed plumbers are the most natural career changers into solar thermal installation, needing primarily to add solar-specific knowledge of collectors, control systems, and thermal system design to their existing piping and pressure testing expertise. HVAC technicians with experience in hydronic heating systems are equally well-positioned given their familiarity with circulating pumps, heat exchangers, expansion tanks, and pressure relief systems. Roofers who want to expand into mechanical work can leverage their rooftop experience and safety training while adding the plumbing and control system skills that solar thermal requires. Career changers from general construction should target plumbing apprenticeships that include solar thermal training as a path that develops both the credential and the skills simultaneously. Related career transitions include solar PV installation, HVAC service, and building energy auditing — all of which share technical knowledge with solar thermal work.
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