There are many advantages of SGPV compare with the traditional grid tie power system.

Low cost and easy installation - SGPV can make full use of all types of buildings' surfaces that face the sun in the city as well as fast and easy installation of solar modules and grid tie inverter. It just needs very low maintenance costs.

Free combination - SGPV can be used as a separate grid tie system and set up as a large solar array with many of them. The quantity of SGPV in the array is just according to your desire.

Combination of SGPV does not interact - The traditional solar grid tie system is always connected with many panels. Those solar panels are connected in series, so the input voltage is very high, although, the traditional grid inverter has an MPPT feature (Maximum Power Point Tracking), but the maximum power point is according to the entire series in terms of solar panels array, if the performance of one piece of solar panels in the system, for some reason, such as leaves, bird droppings, dust, shadow, etc. and degrades, the performance of the entire solar power system will decrease.

SGPV system has no such disadvantage. If the performance of a piece of solar panels in the system degrades, this just effects one SGPV, will not affect other SGPV in the system. Improving the efficiency of the entire solar power system – In a traditional grid tie system, many solar panels are connected in series, so the MPPT of the inverter is according to the total panels in series, not to every panel. Still, there is a difference between every panel, so not every panel is working at the maximum power, this will reduce the total power of these panels in series. But SGPV has no such disadvantage. Because every inverter of SGPV has MPPT function, so every panel is working at the maximum power, this will increase the efficiency of the entire system.

Low power consumption – Most of the parts in the small grid tie inverter are digital ICs and low power MCU, so the power consumption of it is low. Though the quantity of grid tie inverters is increased, this will not increase the power consumption much of the entire system.

1, The total Pmax of solar panels should be equal to or less than the Rated Power(Peak)of the inverter that you will connect.

2, The total Voc of solar panels should be less than the maximum point of the DC input range of the inverter. It is according to the connecting method if you connect solar panels in parallel, all panels must have the same Voc, the Pmax of each panel can be difffferent or same, so the total Voc is as same as one Voc, but if you connect solar panels in serial, the Isc of each solar panel must be same, the Pmax of each panel can be different or same, so the total Voc is the summation of all solar panels connected in serial. Connecting solar panels with the same specififications in a single system is the best choice.

3, The total Vmp of solar panels should above the minimum point of the DC input range of the inverter. The connecting method principle is as same as item 2 above.