AC/DC converters; accumulators [batteries]; electrical charge controllers; lithium batteries; lithium ion batteries; solar panels for electricity generation; solar-powered battery chargers; battery charge devices; batteries and chargers for batteries; AC/DC power supplies; DC input power supplies; apparatus and instruments for measuring electricity; electricity measuring apparatus; power inverters; modules for photovoltaic power generation; photovoltaic modules; portable solar panels for generating electricity; electrical storage batteries for household use; solar cells; computer application software for use in implementing Internet of Things [IoT]