Gridboss/flexboss/ruixu system check before submitting to greenlancer for permit

[OkieSolie]

Hi, I've made a few adjustments and believe ready to submit to Greenlancer for permit creation.

* Inverter: EG4 FlexBOSS 21 Inverter & EG4-GridBOSS
* Rapid shutdown: Tigo TS4-A-O devices with Tigo CCA and Tigo TAP
* Battery: 2 16KW Ruixu
* Panels: 25x 455W TOPCon Canadian Solar (11.4kw)
* Racking: S-5-N 1.5 clamps onto 1.5" standing seam ribs

 IronRidge XR100 Rails with L-foot brackets connected to S-5 clamps
* Safety Switch : ABB 200 Amp 240-Volt Non-Fused Outdoor General-Duty Safety Switch (TGN3324R)

String layout:
* East face: 1 string of 5 panels
* South face: 2 strings of 7 panels (these 2 would share 1 MPPT)
* West face: 1 string of 6 panels

Conduit runs- I was planning on asking them to have them draw it under the panels so less visible, such as the run from the east array to west face.

This will be a grid-tie system with Oklahoma PSO


Wondering if looks good or anything else I should change or ask for.


Thanks!

 

[OkieSolie]

Im thinking now to not do the tigo optimizers TS4-A-O, but just do the ones with rapid shutdowns TS4-A-F. Then would no longer need the CCA and TAP access point.

Part of my reasoning for originally thinking Tigo TS4-A-O is if a panel has an issue would be nice to identify it. In this other thread though another poster mentioned can use a thermal camera to identify a problematic panel. Which that is probably good enough for me, and I like how it simplifies the system a bit.

Thread 'Tigo cca + Flexboss'

Apr 4, 2025

Anyone with experience with the Tigo cca and ts4-a-o know if rapid shutdown will be initiated if the dc power to the cca is disconnected. And if so does this mean my arrays will be shutdown if the cca unit has some type of failure?

Wondering if I should order a backup cca because it would probably take me more than to 2 weeks to get one in hand after ordering.

• CaySol
• Replies: 33
• Forum: DIY Solar General Discussion

 

[OkieSolie]

I think I'm going to go with the eg4 battery instead

From my research Tulsa uses NEC 2018 which doesn't require ul 9540

...but they do use International Fire Code 2018, which looks like it does require ul 9540. My understanding this is a system level cert, and the ruixu battery was certified with their rx-12, not the flexboss currently. Also thinking for home insurance insurability having the ul cert would be a good thing

update: I fully submitted everything to greenlancer, wish me luck!

 

[idahoduckhunter]

I think I'm going to go with the eg4 battery instead

From my research Tulsa uses NEC 2018 which doesn't require ul 9540

...but they do use International Fire Code 2018, which looks like it does require ul 9540. My understanding this is a system level cert, and the ruixu battery was certified with their rx-12, not the flexboss currently. Also thinking for home insurance insurability having the ul cert would be a good thing

update: I fully submitted everything to greenlancer, wish me luck!

Keep us updated

 

[chilly2]

Curious to see how this goes! Good luck