Common Mistakes Solar Installers Make and How to Avoid Them
Solar power has been widely adopted in Canada and the United States. As a result, there is an increasing demand for skilled solar technicians. These installations must be performed correctly for the safety, efficiency, and longevity of the solar system. The best way to ensure that your solar installations will function as intended is to get properly trained through a trusted program. As a solar technician, your role will be to ensure system performance and safety. Building a foundation of knowledge can help you find success in this role and avoid making some of the key mistakes that we will be examining going forward.

Key Takeaways
- Solar installation requires proper wiring and grounding. Many solar installation issues stem from system design errors and wiring problems.
- Panels must be properly oriented and optimally positioned to help ensure good system performance.
- Code compliance is important in Canada and the United States. Systems must comply with codes to help ensure safety, compliance, and performance.
If you're interested in solar installation, start by seeking technical education from a reputable Solar Technician Training Program. Proper training is essential for preventing mistakes.
Mistake #1: Poor Grounding and Bonding
Grounding protects against electrical faults and lightning. Missing or improper grounding connections can be avoided by following electrical codes and manufacturer guidelines. Performing thorough inspections and testing before declaring the job done is also important.
Mistake #2: Faulty Wire Connections and Cable Management
Solar systems rely on good connections. Loose wiring, poorly routed wiring, exposed wires, and incorrect wire types can all cause problems ranging from system inefficiency to equipment damage and fire hazards.
Cables must be protected from weather and the daily wear and tear that comes from exposure to the elements. Before finishing the job, a well-trained solar technician will double-check terminations and connections and will test the system for potential electrical faults.
Mistake #3: Incorrect Panel Orientation and Tilt
The panel orientation and tilt affect energy production. When panels are installed in the incorrect geographic location, at the wrong angle or tilt, or facing the wrong direction, this can all slow the production of energy, leading to system inefficiency.
Solar panels must be optimized for maximum exposure to sunlight. Environmental conditions, latitude, and site conditions all affect optimal panel positioning. The proper position and tilt of the panels are determined during the design phase, and then the panels are installed according to the design. Learning to read the plans and install the panels correctly is essential for avoiding mistakes.
Mistake #4: Inadequate System Design and Load Calculation
Undersized or oversized systems can lead to reduced efficiency and higher costs. Conducting accurate load calculations during the design process can help ensure the system can function as intended. Using design software and best practices can prevent this problem. Knowing how to use design software is an important first step. These skills can be learned through technical training as well as jobsite training.
Mistake #5: Improper Mounting and Structural Issues
Incorrect mounting systems can lead to roof leaks and structural problems. Mounting hardware must be designed to withstand wind and snow loads for the area. Often, building codes will dictate the type of mounting hardware and other materials to prevent these problems. Failure to follow building codes can lead to structural damage, safety hazards, and reduced service life for the solar panels. Always research and follow building codes during every roofing installation.
Mistake #6: Lack of Testing and Commissioning
The only way to know for sure if a system is reliable is to test it. Skipping steps like final inspections can lead to unexpected errors and even safety failures. Every solar technician should have a system in place for testing new systems after installation.
A full systems test with documented results is important for ensuring accountability and quality. If something goes wrong later, having documentation of a successful systems test can help show that the installation is not to blame.
Mistake #7: Safety and Code Compliance Issues
Ignoring local electrical and building codes can lead to safety problems, including accidents on the job site and dangerous electrical problems post-installation. Every solar technician must follow applicable regulations, whether they're performing the work in Canada or the US. Use of proper personal protective equipment and other types of safety equipment is also important.
Sometimes it's tempting to ignore regulation and safety procedures for the sake of expediency, but this is always a mistake. Ultimately, doing the job right and doing the work carefully pays off, and can help ensure that your solar installation will perform as expected.
Avoid Mistakes Through Proper Training
There is a growing demand for skilled solar installers across North America. If you want training in electrical systems and renewable energy, start by signing up for training with a training program designed for adult learners. The Solar Technician Training at George Brown Polytechnic can help you take the first steps in your solar technician career.
Our Solar Technician Training program teaches real-world skills in solar panel installation and maintenance. In addition, our program is designed for adult learners. Whether you're pivoting to a new career or training for your first technical job, we can help. To get started with George Brown Polytechnic’s Solar Technician Training Program, call 1-888-553-5333 or contact us by email at [email protected].