Photovoltaic (pv) power generation how to select the size of the inverter

Photovoltaic (pv) system selection has always been a issue for us, as the heart of the pv system, inverter choose a suitable inverter is very important.

if the roof toward the consistent ( Components in the same direction) , can use all the MPPT; If the roof toward the inconsistent ( Or component orientation is different number) , the use of multi-channel MPPT tracking.

special tip: each manufacturer do not have a unified inverter specifications ( Mainly manifested in the same capacity of inverter, may be different output voltage grade) , therefore, we in the choice of the inverter, which inverter can meet the demand of grid voltage to see first, not only look at capacity.

if the grid is 380 v three-phase electricity, can choose the single camera hung between single phase and zero line, also can choose the output voltage of 380 v three-phase inverter;

for 6 kv and 10 kv high voltage power grid voltage, the need to install the transformer between inverter and outlets. Abroad in some areas is also need to use 110 v voltage transformer to match the power grid voltage.

film components typically take negative ground, at this moment need inverter with the function of electrical isolation, in order to prevent the photovoltaic (pv) system to form the loop inverter frying machine, or other systemic risk.

shadow shade can avoid to avoid as far as possible, as the weeds, dust, which can clean design is not reasonable, Building block, component spacing is too small, etc. ) Difficult to change and solid, inverter with shadow scan function, for this part can be improved after shade open generating capacity.

special remind: though the shadows of the inverter scanning function, can improve the output of photovoltaic (pv) system to a certain extent, but the shadows shade will still bring to our solar system power loss is very big.

general grid pv systems, can only meet & other; Grid electricity demand & throughout; ； Power grid, the grid photovoltaic (pv) system can't continue to work. If the customer still have electricity demand, at this time belongs to & other; From the grid electricity demand & throughout; , at that time, need to select & other; From the grid integrated inverter & throughout; 。

sufficient pv electricity during the day, over load, the rest of the electricity to recharge the battery, the battery for power supply; In the evening, battery electricity to power a load ( Can be set up discharge time) Supplement, not by the grid.

no grid state or not connected to the electricity grid load all meet in energy storage machine from network side ( 回来, ) , in the case of components or battery power load is still working.