Solar panel inspection in New Hampshire

New Hampshire (NH)

New Hampshire is in a cold climate zone with an average of 3.8 peak sun hours per day. Soiling risk is low, and solar adoption is moderate. Here's what NH solar owners should watch for.

Climate zone

cold

Avg sun hours

3.8 hrs/day

Soiling risk

low

Solar adoption

moderate

Common issues in New Hampshire

Natural panel degradation

All solar panels lose efficiency over time at roughly 0.5–0.8% per year. Accelerated in extreme heat or poorly manufactured panels.

Typical loss: 315%

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Based on conservative solar performance modelling and published degradation data

NRELIEA-PVPSSunSpecPVsyst+ published research

Updated April 2026 · Structured performance modelling

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