Critical What does this mean?

A safety-rated fault — there may be a risk of electric shock, fire, or equipment damage. Do not try to fix this yourself. Call a qualified electrician.

Growatt PV Voltage High: Meaning, Causes & Safe Fix

PV Voltage High means the DC voltage from your solar panels exceeds the maximum your inverter can safely handle. Growatt's manual says to disconnect the DC switch immediately.

What should I do first?

Two quick questions — we'll point you to the right starting point.

Is this code still showing on your inverter's display?

What this code means

Every inverter has a maximum DC input voltage (check your datasheet — commonly 550–600V for these models). 'PV Voltage High' means your panel strings are delivering more than that limit — usually because too many panels are wired in series, or cold weather has pushed the voltage up.

What is this downtime costing you?

Rough estimate while your system isn't producing. Adjust the numbers to match your setup.

System size (kW) Peak sun hours / day Electricity rate ($/kWh)

–per day

–per week

–per 30 days

≈ – kWh of lost production per day.

Estimate only — assumes ~80% real-world output vs. nameplate. Actual losses depend on weather, shading, panel direction, and your tariff.

Common causes

Too many panels wired in series for the inverter's maximum DC voltage (most common)
Cold, bright conditions raising panel voltage (panel Voc rises as temperature falls)
Incorrect string configuration at installation

Safe steps to try

Work top to bottom, ticking off each step as you complete it. 0 of 5 done.

Follow the manual's instruction: switch OFF the DC switch immediately.
Do not turn the DC switch back on until a professional has checked the string voltage.
Note the weather and time — cold bright mornings are the classic trigger.
Find your inverter's maximum DC voltage on its nameplate or datasheet for reference.
Call your installer before re-energizing the system.

Is your inverter still under warranty?

Before paying for a repair, check — your installer may fix this free.

Brand Year installed

Based on typical standard warranty terms — always confirm with your warranty card or installer paperwork, as terms vary by model, region, and purchase date.

When to call an electrician

Call your installer before switching the DC back on — the string configuration likely needs changing (fewer panels per string), which is strictly professional work. Do not re-energize the system yourself.

Frequently asked questions

Why did this happen on a cold morning?

Panel voltage rises as temperature drops. A string that is within limits on a warm day can exceed the inverter's maximum on a freezing, sunny morning.

Can I just remove a panel myself?

No — working with DC panel wiring is dangerous and must be done by a qualified installer with the system safely isolated.

Will this damage my inverter?

That is exactly what the shutdown protects against — sustained overvoltage can destroy the input stage. The inverter did its job; now the string design needs correcting.

Need a professional?

This fault is a safety risk — do not attempt to fix it yourself. Contact a qualified solar electrician in your area.

Sources: meaning and troubleshooting verified against the manufacturer's documentation — GROWATT MIN 7000TL-X User Manual (Error 202: 'The DC input voltage is exceeding the maximum tolerable value' — suggestion: '1. Disconnect the DC switch immediately.'); corroborated by Growatt SPH series manual ('PV voltage higher than datasheet')