AyersTG,
I don't have big rig diesels. Both my trucks are either 2500 or 2500HD Chevrolets. As equipped, they range in gross weight of between 8600 and 9000 pounds. I had to wait a year for Auragen to made an adapter for the Duramax Diesel.
It is no longer on their web site, but Auragen has units up to 12KV.
In some of the rural areas, the local codes requires that the new home owner build a large pond to permanently store water to allow the rural fire department to have a source of water to fight a home fire. This also puts the home owner into a different risk class for insurance costs. Some home owners have utilized these ponds for fish and as swimming areas for their families enjoyment. In dry times, these ponds become an oasis for wild life.