The complete step-by-step process from site prep to customer handover - including IEC 62446 commissioning requirements, torque specs, and documentation checklist. For more on the full installation workflow, see our solar panel installation guide.
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What is the first step in installing solar panels?
The first step is to conduct a solar site assessment. This involves evaluating your roof's suitability, considering factors like its orientation, t.
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This guide provides field-tested troubleshooting procedures for the six most frequent solar combiner box failures, from circuit breaker nuisance tripping to terminal overheating and water ingress.
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DC breakers deal with raw one-way power from solar panels that have huge interruption capacity: between a few thousand and 10,000 amps in some models. DC does not “zero out” like AC would, so this is required. A new circuit breaker (s) will be added to the electrical panel.
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The short answer: your circuit breaker needs to be rated at 125% of your inverter's maximum output current. This comes from NEC Article 690. 8, which treats solar systems as continuous loads. So if your inverter outputs 20 amps max, you'd need at least a 25-amp breaker.
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