Inverter ratings use VA (volt-amperes), which differ slightly from watts (W). You must consider this to select an appropriately rated inverter. Ensure your battery matches your inverter in voltage, chemistry, and capacity. Always plan for future load expansions to avoid premature upgrades. Choosing the right inverter size is one of the most important decisions when. For inverters designed for residential use, the output voltage is 120 V or 240 V at 60 Hz for North America. It is 230 V at 50 Hz for many other countries. Most grid-tie inverters have peak efficiencies. The inverter capacity calculator helps you find the right inverter size for your home or office. Some appliances, particularly those with electric motors, need a much higher start up surge than they do when running.
