Pressure Washing with sodium hypochlorite (bleach) but I want to use coated sodium percarbonate

I am in the pressure washing industry. I don't want to use sodium hypochlorite (bleach) to clean exteriors of properties because it is so corrosive to my equipment and people's homes and businesses. I want to start using coated sodium percarbonate powder (peroxide). How much SP do I need to add to a gallon of water to equal 12.5% SH cleaning power. Also, it seems to only last about 6 hours. Is there another chemical I can add to it to make it last much longer?


