Understand the differences between DC and AC-coupled solar batteries and learn which offers better efficiency, expandability, and performance for your home. IP stands for Ingress Protection and describes to which extent dust and humidity can reach the inside of an electrical device. 5 GW of installed rooftop solar by 2035, supporting the UK's independence from imported gas and helping accelerate the clean energy transition. The financial and environmental benefits of onsite. the Ministry of Trade and Industry. Our main goals are to ensure a reliable and secure energy supply, promote effective competition in the energy market, and develop a dynamic energy sector in Singapore. DC-Coupled. Battery coupling refers to the method by which batteries are integrated with solar inverters to store excess energy generated by solar panels. It dictates how the energy flows from the solar panels to either the battery storage, the household appliances, or back to the grid.