SOFAR PV Over-Voltage ID069 | Faisalabad, Lahore

SOFAR inverter shows PVOVP (ID069, PV over-voltage)

Short answer

ID069 means the voltage from a solar string is higher than the SOFAR inverter's maximum input. SOFAR says the fix is to reduce the number of panels in series. It often shows on cold, bright winter mornings, when panel voltage is at its highest, or after higher-voltage panels were fitted.

What you will see

ID069 on cold, clear mornings
Appears after panels were added or replaced

Why it happens

Panel voltage rises as temperature falls. A string designed close to the limit in summer can go over it in winter.

Too much voltage can damage the inverter, so it refuses to run.

Diagram

Cold mornings raise string voltage

Summer noonSpring morningCold winter morning

Illustration. If the string is designed too close to the limit, winter mornings push it over.

Fix by re-stringing with fewer panels in series. Applies to SOFAR KTLM, KTLX, HYD and ESI inverters.

What you can check yourself

Note the time and temperature when it happens
Note any change to panels or string layout

What not to do

Do not add panels to a string yourself
Do not keep restarting the inverter

When to call us

Check string design against the inverter's input limit at low temperatures
Re-string with fewer panels in series

Winter mornings

Clear December and January mornings in Punjab push string voltage up. Our engineers in Faisalabad and Lahore check string design for winter.

Send us

Event List photo, panel model and number of panels per string