Irish homeowners are increasingly adopting solar panels with the help of government subsidies, driving Ireland's total installed PV capacity to 2.7 GW. To help homeowners understand the financial benefits of different system configurations, AirPV has created a solar and battery calculator tool. The tool aims to empower homeowners to make informed decisions about their home energy systems, with founder Scott McKechnie starting a microgeneration campaign to encourage more communities to switch to solar and batteries through group installation deals. The updated solar calculator tool includes battery arbitrage and the 5 kW inverter size limit for Irish home solar systems, allowing users to determine the optimal number of solar panels and battery storage for cost savings and payback time. McKechnie's emphasis on using tools like AirPV to avoid misinformation and ensure sensible decision-making when installing solar systems is further supported by the tool's ability to provide tailored quotes from installers based on user input, allowing homeowners to compare options and submit their contact details for installation. Additionally, McKechnie has developed a building energy rating (BER) calculator to show how solar and battery systems can impact a home's energy efficiency.