This guide walks you through calculating inverter size based on panel capacity, power usage, and safety margins. . Solar inverters are the heart of any solar energy system, converting the direct current (DC) electricity generated by solar panels into alternating current (AC) power for homes, businesses, or utility grids. If the inverter is too small, you may lose potential power; if it is too large, you may pay for unused capacity. But that's just the beginning of its job description. DC to AC Conversion: The. . Choosing the right solar inverter size is critical—and one of the most common questions: what solar inverter size do I need? Whether you are installing a rooftop system in California, powering a remote cabin in Alberta, or sizing for a community center in Rajasthan, getting it right means. . BIPV project inverter selection Judging from the main features of the BIPV project, there are many architectural application scenarios, such as flat roofs, inclined roofs, curtain walls, transparent roofs, sunshades, etc.