Error 202 on a Growatt inverter: PV Voltage High - the DC input voltage is exceeding the maximum tolerable value
Short answer
On a Growatt inverter, Error 202 means: PV Voltage High - the DC input voltage is exceeding the maximum tolerable value. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 24 September 2026 · 2 sources
What it means
On the MIN 2500-6000TL-X
The manual says: PV Voltage High - the DC input voltage is exceeding the maximum tolerable value.
Part involved: PV input over-voltage.
Likely causes:
- String voltage above inverter maximum (500/550 V).
On the SPH 3000-6000TL BL-UP (48 V battery hybrid)
The manual says: PV Voltage High.
Part involved: PV input over-voltage.
Likely causes:
- PV Voltage High.
Is it safe?
Switch the inverter off at its isolator and call an engineer.
| Does the inverter stop? | Yes |
|---|---|
| Severity | Safety lockout |
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: no.
Manual reset: yes, after string design is corrected.
What you can check
On the MIN 2500-6000TL-X
- Read and note the exact code and time from the inverter display or app (screenshot).
- Call the installer. Do not touch DC cabling.
- Growatt's manual says 'Disconnect the DC switch immediately': if the inverter's DC switch is on the outside of the unit and within reach, turn it OFF; do not touch cables or connectors. Then call the installer.
- Growatt's manual says 'restart inverter'. A homeowner can switch the inverter off and on at its AC isolator/breaker; leave DC switching to the installer unless the manual step says to switch DC off immediately (Error 202).
On the SPH 3000-6000TL BL-UP (48 V battery hybrid)
- Read and note the exact code and time from the inverter display or app (screenshot).
- Call the installer. Do not touch DC cabling.
- Manual: 'Disconnect the DC switch immediately and check the voltage' - turn the external DC switch OFF only if it is on the outside of the unit; leave voltage checks to the installer.
- Growatt's manual says 'restart inverter'. A homeowner can switch the inverter off and on at its AC isolator/breaker; leave DC switching to the installer unless the manual step says to switch DC off immediately (Error 202).
What the engineer will check
- Measure open-circuit string voltage (cold-weather Voc rise).
- Check string design against inverter max DC voltage.
- Check for mixed/incorrect module counts.
Who to ask for: PV installer / system designer.
Certification: Electrician competent in grid-connected PV (BS 7671 Section 712; IET Code of Practice for Grid-connected Solar PV), ideally the original MCS-certified PV installer; brand-approved/trained installer to keep manufacturer warranty.
What you might notice
Sources
- Growatt MIN 2500-6000TL-X Installation & Operation (User) Manual, general EN 2022-06 ↗ · EN 202206 · page PDF p.22 · Reviewed 24 September 2026
- Growatt SPH 3000-6000TL BL-UP User Manual EN 202512 ↗ · EN 202512 · page PDF p.63 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026