Before purchasing my generators I considered installing one of those down at my shop/barn. My house already had a generator inlet box & interlock. The GenerLink looked like an clean & easy solution for my shop/barn service entrance with meter coming off nearby pole. However, the one thing that concerned me was their limits on current capacity. If I purchased any additional equipment and needed to upgrade to a 10kw generator I was concerned that I might bump up against their limit:
"WARNING
GenerLink™ allows for the interconnection of a 120/240 volt generator with a continuous output of 30 Amperes or less. Any source connected to GenerLink™ that does not meet this criteria or exceeds this rating could cause serious operator injury or damage GenerLink™."
"CAUTION
Do not turn on your home’s heat pump or central air conditioning while using GenerLink. The starting wattage for these devices exceeds GenerLink’s 30-amp or 40 amp capacity."
Edit: So, in order to have more flexibility to future proof myself a bit, I chose to install an interlock kit rather than go with the GenerLink. I purchased interlock kit from this outfit since they had one to fit my panel and it was relatively inexpensive and straight forward to install in my particular breaker box:
http://natramelec.com/
Below is shot of my install of their kit. It was fairly easy and the kit even provided the right size drill bit, allen wrench and operation decals, etc. for sliding interlock installation. All I had to purchase in addition to the kit was the additional wire, breaker, flex conduit and inlet box to mount on service entrance pole.