I am aware that GridBOSS has a generator input, but I can not find any guidance on how to connect additional wires. Specifically, I'd like to know where do 240V wires go? These are necessary to charge battery. Is there a diagram somewhere?
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December 12, 2024 7:04 pm
9 Replies
December 12, 2024 7:41 pm
For reference, here's the generac wiring diagram:
December 17, 2024 12:47 am
@eg4c For the battery charger function on your generator you need to run a separate 120 volt circuit from your breaker panel to your generator. This would be independent from your EG4 equipment. I would recommend you check your generator manual. The page that you attached describes T1 VAC load supply as this function.
December 12, 2024 10:08 pm
The Dry1 dry contact ports are currently the only option for wiring a 2-wire stop/start with the GridBOSS. Dry2 is unused at the moment and reserved for future functionality. For Generac generators, I’ve observed that for 2-wire stop/start configurations, the red wire should be connected to NO1 and the white wire to COM1.
https://eg4electronics.com/wp-content/uploads/2024/07/EG4-Grid-BOSS-User-Manual.pdf
December 12, 2024 10:18 pm
@jared thank you so much for reply! So, to recap:
- the wire #23 (+12 VDC) goes to NO1
- the wire #194 (Transfer) goes to COM1
- the wire #0 (DC Common) - does it go to neutral? ground?
- Can you also advise where should the N1, N2, and T1 wires be connected to?
January 4, 2025 4:09 pm
I am working on same issue. I have a 20kw generac whole home with Evo 1 controller. This video has helped. I am close
January 4, 2025 4:13 pm
I was told by EG4 team that I had to install a 2 wire start kit on my generator since it previously was controlled by an automatic transfer switch. I moved the N1 and N2 wires, to mimic the two wire start kit, over the the right ports on the Molex plugs for the Generac EVO1 controller respectively and have been working with EG4 support to get it to fire up. The 12vdc is not working properly to charge my generator start battery. Therefore my generator battery keeps going dead, complicating troubleshooting.
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