Proof of concept

I need to buy a solar panel system and a radient floor heating system for a potential emergency systems kit designed specifically for home RV or, boats/yachts.   I am at the point in my project to purchase and assemble the kit as designed for a proof of concept before bringing it to market.  Once this phase is completed then I can open up for business.  I would never want to sell anything that doesn't work or is being upgraded due to flaws in the system. There are way too many products on the market that already are doing that, and especially as an emergency kit that needs to work every time.  The potential is that it could be used all the time which would cut down on energy costs and fossil fuel consumption and emissions.  Thank you