Apparently, Forest River signed a deal with NPS power a month or two ago to be their sole supplier of generators for (certain?) RVs for some undisclosed time period. Details are awfully sketchy; most of the industry news report sites seem to have pulled the story. Maybe the deal fell through, or was announced prematurely, or something?
Anyhow, the NPS website is
here. NPS is not a subsidiary of Yamaha; they're a small company, and simply are using Yamaha engines. While the generators themselves may well be excellent, for all I know, they also seem to tout their product using some questionable, misleading or outright incorrect claims: for instance, that they are the first to ever sell a built-in RV generator that uses inverter technology (Onan has one or two inverter models, and have for awhile); and that modern electronics are more sensitive than ever to power line quality (quite the opposite, on the whole--a switching power supply is by general nature quite insensitive to power quality, though some designs may have specific needs).