Path-Q Solar
How should inverter location affect the choice between string inverters and microinverters?
Answer
Inverter location matters because string inverters need a suitable accessible location for centralized equipment, while microinverters place conversion equipment under or near the panels. Choose the architecture that provides acceptable heat, moisture, access, cable routing, serviceability, and electrical performance.
Key points
- A string inverter generally benefits from a shaded, ventilated, accessible location with suitable clearance.
- Microinverters avoid a single central inverter location but expose more electronics to rooftop environmental conditions.
- Cable distance, voltage drop, fire access, and equipment clearances can affect either design.
- Service access and replacement strategy should be considered over the system's life.
What it depends on
- Available wall or equipment locations
- Heat, moisture, salt, dust, and physical exposure
- Distance between array and electrical equipment
- Roof access and expected maintenance approach
Risks and trade-offs
- A poorly located string inverter may experience excess heat or be difficult to service.
- Microinverters may be harder to replace if roof access is restricted and expose more devices to weather.
- Long cable runs or unsuitable locations can add cost and electrical losses.
Information you may need
- Proposed equipment locations and clearances
- Environmental conditions at each location
- Cable routes, access plan, and equipment service terms
Your next step
What to do next
Ask for two complete designs showing equipment location, cable routing, access requirements, and expected production before comparing prices.
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