Systems that use inverter grade have a relatively unstable output power. These systems do not use batteries for backup. That is, if it is sometimes sunny and sometimes cloudy during the day, the electricity generated is irregular. These inverters are commonly used in medium and large systems to finance and assist utility power. These inverters are also used at home for small systems that can be connected to the mains. This means that during the day, the solarium generates electricity with full capacity and after using it, the person enters the additional electricity into the network. In this system, there is a need for net metering that works positively and negatively with the city electricity network, that is, the extra electricity enters the network during the day and enters the network at night or on cloudy days.
