For this product, the manufacturer offer's 12 months general warranty for manufacturing faults and defects including the solar panel, electronics and battery.
Dear Craig, we have not seen such a solution, unless an electrician can make this happen. From our perspective, it would be easier to install solar light with a motion sensor that will be turned once someone or car approaches within the range (usually about 10m, 120'). You can check a few options here: https://sunnybunny.com.au/solar-sensor-lights/
The battery is replaceable. We supply batteries and other spare parts for the solar lights we sell.
The height of the mounting part that attaches to the wall is 13cm and the width is 8.5cm
The product is covered with a 12 months general warranty for manufacturing faults and defects including the battery. The operational life of the battery is 2 years, however, it may vary depending on the operational conditions including the correct installation, climate and weather environment.