Over the past few years, we have witnessed a big drop in the costs of solar PV equipment. The installation of solar panels is now a no-brainer for many homeowners. The one big downside of PV arrays is the energy produced is not consistent. At night, there is no sun. During the winter months and under cloudy skies, there is a real drop in the energy produced. Adding an energy storage battery to the system can make a big difference by boosting the amount of solar energy you can actually use domestically. Here, besides general considerations, we’ll take a look at the components chosen by one enthusiast to build a useful 48-V energy storage installation powered from a rooftop PV array.