design hot water heat pump system

I am looking for a freelancer to design a hot water heat pump system with a heating capacity between 10kW and 20kW. This system will be primarily used in residential settings and operate on renewable energy sourced from solar, wind, or other sources. This project is especially suited to skilled designers who have experience in designing heat pump systems to meet residential needs while using renewable energy. The system will require a buffer tank which will be used to store heat energy and potentially act as a heat battery. The house is large with the current system being 3 separate hot water tanks, with electric elements. The new system will have a large heat pump as the primary heat source with electric elements as a backup for high hot water usage times. If you are up for the challenge, I look forward to discussing the project further with you!