“Inverter” Heart of the Solar System
Inverters are the heart of Solar power system, it facilitates the conversion of DC into AC so that generated power can be effectively consumed by home appliances or can be fed into the grid. Solar system is always producing DC, so every system needs inverter.
In India as per CERC tariff guidelines, for Solar PV total cost considered for Inverter is just 60 Lakh/MW which is nearly 7% of total cost, previously it was near about 1 Lakh/MW. Decreasing trend in the price of inverter increases the pressure on manufacturer to provide maximum facilities in minimal cost. But in this era where prices are decreasing rapidly, technology will be playing very critical part in capturing market share.
Delta Electronics is showing very good presence in Inverter business & has a good market share amidst the presence of market leaders like SMA & Power One.
In 1 day workshop in the office of Delta Electronics we came to know few good things about Inverters. They are 2nd in terms of market share of string inverters & also trying to capture market of central.
Features of Inverters
? Inversion function
? Maximum Power Point Tracking
Inverters are classified as grid connected inverters & off-grid inverters. Inverters are also available in single phase & three phases which are used as per their requirement. Inverters with dual MPPT is in trend & most of the developers prefer to have it with their inverters.
In industry three types of inverters are in trend out of which string & central are famous among developers in India while micro inverters still faces problem in market entry.
String inverters are available with or without transformer with largest size of 30 KW. They have plug in play type of string inverter which is easily placed below the modules which saves land. Without transformer, inverters are lighter weight & have higher efficiency. Similarly central inverters are very big in size even in the range of MW capacity & needs huge land separately to place it. Delta central inverters have such an arrangement that even if part of inverter get damaged, only a limited amount of power gets affected (rake of inverter), while other part of inverter functions normally & we need to replace only a small portion of inverter. Micro inverters are yet to get trendified, so most of the manufacturers are not showing their interest towards it.
Downtime is reduced in string inverters while it is little expensive then central inverters. Its working is not affected by damage of one inverter while central inverter working is affected badly. Although String Inverter has very few installations worldwide, the reason being higher investment cost.