How do I fix Low Insulation Resistance on a Solis?

Check DC cables along full run for damage, crushing, or abrasion. Check panel junction boxes Then: If fault occurs in wet weather, monitor — may self-resolve when array dries. Re-test insulation resistance with system off

Solis

E012

Low Insulation Resistance

Insulation resistance between PV array and earth below safe threshold. Possible DC cable fault.

Common causes

DC cable damaged or pinchedPanel junction box faultWet conditions causing temporary resistance drop

What to check

STEP 1

Check DC cables along full run for damage, crushing, or abrasion. Check panel junction boxes

STEP 2

If fault occurs in wet weather, monitor — may self-resolve when array dries. Re-test insulation resistance with system off

Escalate if

Cables and junction boxes clear, fault persists in dry conditions — panel or underground cable fault

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