I am not sure if my answer is what you are looking for. Honda says EU2200i are only compatible with EU2000i or EU2000i companion within a specific serial number range. EAAJ-2017305- EAAJ-9999999. EACT-1000001- EACT-9999999. Now having said that, I own a 10 year old Honda EU2000i and recently bought a new EU2000i, that I found on Craigs list. I went to a Honda dealer bought the correct parallel cords, and I use a # 12 extension cord and have run both Hondas for over 5 hours together on our 5th wheel, no problems. Hope this!
Bruce
By the way paralle kit part # 08E93-HPK123HI from Honda $44.99