TL;DR
A combiner box is the enclosure in a solar array where the outputs of multiple PV strings are paralleled onto a single set of feeder conductors, with a fuse or breaker protecting each string. Larger string-inverter and ground-mount systems need one to consolidate wiring before the long run to the inverter, while microinverter systems generally do not.
What it means
A combiner box is the enclosure in a solar array where the outputs of multiple PV strings are paralleled onto a single set of feeder conductors, with a fuse or breaker protecting each string. Larger string-inverter and ground-mount systems need one to consolidate wiring before the long run to the inverter, while microinverter systems generally do not. Inspectors check it for proper fuse sizing, torque, labeling, and rapid-shutdown compliance, and it should appear on the system's single-line diagram.
Where it sits in the glossary
Combiner box is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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