Diode reverse voltage (PIV)
✕ errorvoltage/diode-piv
What it looks like
D2 blocks 18 V in reverse — its rated reverse voltage is 10 V. It will avalanche.
What it checks
When the solver finds a diode OFF, it knows the exact reverse voltage across it — and checks it against the part's declared peak-inverse-voltage rating. Error past the rating, warning past 80%.
Why it matters
A diode past its PIV avalanches: it conducts in reverse, usually destructively for a rectifier. The 'blocking' diode protecting your battery becomes a wire at exactly the moment it mattered.
How to fix it
Pick a diode rated comfortably above the worst-case reverse voltage it must block — PIV is cheap; 1N4007 blocks 1000 V and costs the same as the 50 V part.
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