Follow the link to your particular model (note, don’t update firmware just because you feel good about it, unless you have a specific problem you are trying to fix)

https://watts247.com/manuals/gw/Firmware/ 

BE SURE YOU HAVE THE CORRECT FIRMWARE FOR THE CORRECT MODEL. WE WILL NOT BE HELD RESPONSIBLE

Here is a video as an EXAMPLE updating the 6000T, the procedure is similar for other models (make sure you have the correct firmware downloaded)

Firmware Update 6000T 

Secret to the settings 

https://www.youtube.com/watch?v=oDiva1SJwpc 

https://watts247.com/docs/growatt-wifi-troubleshooting/ 

Normally , setting 10 should be "2 "for 24V models and "4" for 48V models

the 24P and 48P use the same firmware and control board. this setting is the only thing that differentiates

 1. Press “UP” and “DOWN” at the same time 

2. Input password “820” and enter the setting 10

3. Press “ENTER”, revise battery number to be
2 pcs (4pcs for 48P) and confirm by pressing “ENTER” 

4. Exit 

5. Shut down and restart the inverter  

 Adjust or calibrate display values 

1. Press “UP” and “DOWN” at the same time 

2. Input password “111” and enter. 

3. Scroll through to the parameter that
requires calibration. NOTE A prefix is to Add, S Is to subtract the
"value" e.g 1.1 in the suffix 

4. Exit 

5. Shut down and restart the inverter  

 Hold down the ENTER and Escape buttons
simultaneously for more than 5 sec. 

The unit will reset to factory defaults  

 Factory reset procedure for 24P 48P and LVM-ES 

1. Press “UP” and “DOWN” at the same time 

2. At "PAS" screen prompt Input
password “305”  

3. Press “ENTER” 3X slowly 

4. Press "ESCAPE" once 

(Remove solar and AC power, turn inverter
switch off and allow to turn off after 20 to 60 seconds 

5. Shut down and restart the inverter) 

Inverter Fault Codes …Troubleshooting 

https://watts247.com/docs/inverter-fault-codes-troubleshooting/ 

Follow the link to your particular model (note, don’t update firmware just because you feel good about it, unless you have a specific problem you are trying to fix)

https://watts247.com/manuals/mpp/Firmware/ 

BE SURE YOU HAVE THE CORRECT FIRMWARE FOR THE CORRECT MODEL. WE WILL NOT BE HELD RESPONSIBLE

Here is a video as an EXAMPLE updating the LVX6048WP, the procedure is similar for other models (make sure you have the correct firmware downloaded)

LVX6048 WP Firmware  

Secret to the Settings

Some setting numbers may vary, but the setting description is similar

https://www.youtube.com/watch?v=oDiva1SJwpc  

The Manual Way.

take the manual, and each setting will be denoted by "(Default)" , go through and manually set each setting back to factory defaults.

Using the PC software.

Watchpower for all Models EXCEPT the Hybrid 2424, and LVX6048WP, and LVX6048

Solar Power ONLY for models shown above

software can be downloaded from MPPSOLAR.COM

there is a tab called "Factory Defaults" or similar click that

https://watts247.com/docs/inverter-fault-codes-troubleshooting/  

https://watts247.com/frequent-topics/wire-sizing-calc/ 

https://watts247.com/frequent-topics/solar-panel-config/ 

https://watts247.com/frequent-topics/inverter-wiring/ 

https://watts247.com/frequent-topics/solar-breaker-calc/ 

https://watts247.com/frequent-topics/gen-util-charge-tips/ 

https://watts247.com/frequent-topics/ac-breaker-calculations/ 

https://watts247.com/frequent-topics/wiring-diagrams/ 

https://watts247.com/frequent-topics/wiring-diagrams/ 

https://watts247.com/frequent-topics/wiring-diagrams/ 

https://watts247.com/frequent-topics/wiring-diagrams/ 

This is a link to a Google Docs on a comparison sheet of all inverters available

click here 

https://watts247.com/frequent-topics/inverter-power-on-troubleshooting/ 

Please follow this troubleshooting flowchart first

• https://watts247.com/videos/watts247-videos/ 
• Secret to the Settings Growatt and MPP Solar (MPP SOlar has the same setting names but differnt numbers ) GroWatt SPF3000TL LVM-48p Secrets of the Settings (updated)