Work a real service call from the solar track
This is not a demo built for a sales page. It is one of the graded diagnosis labs from the Solar Service Technician — Foundations to Field Mastery, unchanged. Commit to the checks you would actually make, and the grader will tell you what a seasoned technician would have done with the same call.
Graded in your browser. No account is created, nothing is recorded, and no progress or certificate is affected.
String inverters — operation & service · String inverter faults and what they really mean
String inverter fault call
On site
A 5 kW string inverter logs 'Isolation resistance low' most mornings between 07:00 and 09:30, then runs normally all day. Production is down about 9% month over month. The roof is nine years old and the array has two strings.
Select the checks and actions that belong in this visit.
What the full track adds
- Every module in the track, with safety, sequence and checklist labs alongside diagnosis calls.
- Saved progress and attempt history, so you can see which judgment is still shaky.
- The four-stage capstone on one continuous hybrid system, and the certificate that follows it.
- Printable commissioning sheets and service reports you can use on real jobs.
Training scope and safety
- The Academy provides technical training and instructional scenarios only.
- Completion does not constitute a professional license, electrical certification, or authorization to work on live electrical systems.
- Work on photovoltaic, battery, and electrical systems involves potentially lethal voltages and must only be performed by qualified persons, in accordance with applicable codes, regulations, and employer safety programs.
- Labs and materials are educational. The technician and their employer remain solely responsible for safe work practices, isolation, PPE, and compliance on actual jobs.
- EcoPowerHub AI / EcoService OS makes no warranty that completion of this training guarantees safe or correct field performance.