- Solar and energy
- Solar inverter
201
Growatt error 201 on solar inverter: residual current too high
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
Growatt error 201 (Residual I High) means the inverter has measured a leakage current that is too high. Restart the inverter as the manual says; if the message stays, do not touch cables or panels and call the installer.
Safety first
Stop and check this first
- High leakage current can mean a damaged cable: do not touch panels, cables or DC connectors. Growatt warns that the inverter takes 20 minutes to discharge after disconnection.
Safe checks you can perform
- Read the full message on the OLED display
- Restart the inverter as Growatt advises
- Log whether 201 coincides with damp weather
Leave these tasks to a qualified professional
- Do not attempt this professional task: PV string insulation resistance test
- Do not attempt this professional task: External AC residual current device check
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
PV string insulation resistance test
What they doThe installer measures the insulation resistance of each PV string to earth to find where the current is escaping.
They must show youthe insulation resistance measured on each string and each string's voltage.
In writingthe values per string and which connector, cable or module was replaced.
External AC residual current device check
What they doThe electrician checks the inverter's AC breaker and, if an RCD is fitted, that its residual current rating meets Growatt's requirement.
They must show youthe model and rating of the installed RCD and the result of its trip test.
In writingthe rating verified and whether the device was replaced.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Read the full message on the OLED display
- Who:
- you, looking at the inverter display without opening anything.
- How:
- check that the text reads 'Residual I High' with number 201 and note the time, the weather and whether there was rain or dew.
- Result that matters:
- confirming it is the residual current fault and not insulation error 203 or another code.
- If 201 is shown:
- continue with the restart the manual describes.
- If a different code is shown:
- look up its specific meaning before doing anything.
- Evidence to keep:
- a photo of the display message and a note of the weather.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
Restart the inverter as Growatt advises
- Who:
- you, using only the procedure the manual describes for your system.
- How:
- the manual's first step for 201 is to restart the inverter; if your installer showed you how to do it with the AC breaker and the DC disconnect, follow that order and wait, without touching connectors or cables.
- Result that matters:
- finding out whether the leakage was a one-off or persists after the restart.
- If the inverter feeds in again and the message is gone:
- note the date and watch whether it returns in wet weather.
- If the message remains after the restart:
- Growatt says to make contact; call the installer.
- Evidence to keep:
- the restart time and what the display showed afterwards.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
Log whether 201 coincides with damp weather
- Who:
- you, over several days.
- How:
- record every occurrence of 201 with the weather: rain, snow, fog or a dewy morning, and whether it clears once the panels dry.
- Result that matters:
- giving the installer a pattern linking the leakage to moisture, which the manual mentions.
- If it only happens when damp:
- say so, because it points the inspection to module and cable insulation.
- If it also happens in dry weather:
- mention that, since it points to another installation defect.
- Evidence to keep:
- a table with date, time, weather and how long the fault lasted.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Solar and energy
- Brand
- Growatt
- Product type
- Solar inverter
Known code variants
- 201 Creado
- 201 Created
- 201 Creato
- 201 Créé
- 201 Erstellt
- código 201 Epson
- EcoTank 201 memoria llena
- EcoTank 201 memory is full
- Epson 201
- Epson error code 201
- Epson ET-5800 201
- Epson ET-5805 201
- Epson L6550 201
- Error al recibir faxes porque la capacidad de datos está llena
- Error Residual Alto: 201
- Failed to receive faxes because the fax data capacity is full
- Growatt error 201
- Growatt Error Residual Alto
- Growatt Error: 201
- Growatt fuga de corriente alta
- Growatt leakage current too high
- Growatt MIN 201 corriente residual
- Growatt MIN TL-X error 201
- Growatt residual current fault
- Growatt Residual I High
- HTTP 201
- HTTP status 201
- inversor Growatt 201
- La memoria está llena Epson
- The memory is full Epson
What it means
In the installation and operation manual for the Growatt MIN 2500TL-X to 6000TL-X (edition GR-UM-155-A-04), error 201 'Residual I High' is listed among system faults, which Growatt says are mainly caused by the installation rather than the inverter. The manual explains that the inverter monitors residual current and disconnects from the grid if capacitive leakage from the modules exceeds 50 mA, and that this leakage depends on mounting and weather (rain, snow). The code alone never proves a part is faulty, and other models or firmware may differ.
Warnings and stop conditions
- Highsource verified
High leakage current can mean a damaged cable: do not touch panels, cables or DC connectors. Growatt warns that the inverter takes 20 minutes to discharge after disconnection.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
Symptoms and causes
Probable causes · in order
- Capacitive leakage from the modules to earthCommon
Growatt explains that during feed-in a leakage current flows from the cells to earth depending on how the modules are mounted; above 50 mA the inverter disconnects.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
- Moisture from rain or snowPossible
The manual itself notes that rain and snow affect the size of that leakage current, so error 201 can show up in wet weather.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
- Wiring defect in the installationPossible
Growatt classes 201 as a system fault, mainly caused by the installation rather than the inverter, so a damaged or poorly insulated cable is worth checking.
Evidence: Installation & Operation Manual MIN 2500TL-X MIN 3000TL-X MIN 3600TL-X MIN 4200TL-X MIN 4600TL-X MIN 5000TL-X MIN 6000TL-X (GR-UM-155-A-04)
Virtual technician
Does 201 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Shenzhen Growatt New Energy Co., Ltd · 2022 · manual
- 2
Shenzhen Growatt New Energy Co., Ltd · 2022 · manual
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