Factors such as efficiency, reliability and solar energy systems already in place are among the most important factors to look out for when determining the best inverter to work with. CIS inverters are able to change the Direct Current (DC) provided by the solar panels into Alternating Current (AC) suitable for domestic or business purposes. The example inverter is equipped with maximum power point tracking (MPPT) and grid-tie features, which allow it to be operated in a fully connected environment to make the best use of resources.