ᐅ How effective are combined systems featuring heat pumps, solar panels, and energy storage?

How efficient are combined systems consisting of a heat pump, solar panels, and an energy storage unit in practice? Do they actually deliver all the theoretical benefits attributed to them?

A heat pump extracts energy from the natural environment, solar panels generate electricity from sunlight, and an energy storage unit can store excess energy. Together, they could help reduce energy costs and lower CO₂ emissions. But how reliable are these systems, and is the investment worthwhile in the long term?

Who has experience with this?