Claims.. now just match it with links to real products and you might have something. Otherwise.. just talk.
I posted the manufacturer name and the model numbers of the solar panels.
Viessman is the vendor of hydrogen ready storage combi boilers like mine (model 222-F). And they have CHP solutions.
Take your pick on battery vendors; I went with Pylontech US3000 rackmounts. I know people with Pylontech for EPS, who also have a Tesla powerwalls. The guy opposite me has put 28 batteries in his garage, so his set-up is very homebrew.
Google (or your preferred alternative) is your friend.
Inverters - much of a muchness. SofarSolar, BYD, Sunny Boy, GivEnergy... Or you can go for microinverters.