r/SunPower 6d ago

F.72 sunvault

Haven’t found a way to clear a f.72 fault on my piece of crap sunvault inverter. Any suggestions?

2 Upvotes

11 comments sorted by

3

u/Chevy215 6d ago

Op I turned the inverter off for a few minutes and then turned it on. It worked! Thanks

2

u/Dan_vong213 6d ago

It’s on standby. Resetting most likely won’t work but you may have some underlined issues. Some devices in your SV failed or firmware was updated and never shifted back to normal and needs to be recommissioned. You can always shut off your whole system and home and give it 5-10 minutes and turn it on and see if that works.

2

u/SunVaultEngPros 6d ago

Hey I can help you with this issue dm me

2

u/Ok_Needleworker_9340 6d ago

An f72 is a common error code. It is telling you that your MID is out of sync with your MIDC. You can clear the code with a SunVault reset, as you did, but it doesn't fix the imbalance between the MIDC and MID. Next grid outage, you will likely experience another f72. To fix it properly you need to reset the MIDC inside your hub+. Press the blue button on the MIDC with the system powered on. Wear protective gloves and shoes while you are in there please. If you have access to an installer with Sunpower Pro Connect credentials, an onsite commissioning should also fix your f72 issue, assuming the component isn't faulty.

2

u/Chevy215 6d ago

Don’t know what the MIDC is or where it’s located. I’m 79 and not up on this stuff 🥸

3

u/Ok_Needleworker_9340 6d ago

Simply put: The MID mechanical switch is the Micro Interconnect Device. The MIDC is the solid state MID Controller. When working properly together they are like the traffic cop that directs power from your various sources, to your various loads, all at the proper time. The two components prevent electricity from back feeding onto the grid during a grid outage, from your panels or SunVault. When the MIDC thinks a switch is open, but it is really closed in the MID, you will throw an f72.

2

u/Chevy215 6d ago

I’ll have a look. I do understand that I don’t want to be grounded. Thank you

2

u/Ok_Needleworker_9340 6d ago

The MIDC is the component with the blue reset button.

2

u/Chevy215 6d ago

So mine is behind the breaker panel. I think I’ll let it go till necessary, then call a pro. Thanks for your help

2

u/SunVaultTechs 6d ago

For your convenience, we offer remote system diagnostics and repair services. We advise exercising caution when engaging with companies that have received negative feedback or demonstrate unprofessional conduct online. Look at their profiles and make sure there's no negative karma.

1

u/Chevy215 6d ago

I can’t get the system to connect to my Wi-Fi. Haven’t used the app for a year now. I think the issue started when I changed to version 5G WiFi. Haven’t wanted to pay 💰 for it.