Currently, more and more families are choosing to purchase rooftop distributed PV panels for their homes. Buying multiple panels means building a complete PV system, and the second core of this clean energy generation equipment is, of course, the PV inverter. Do you know what style of inverter is the best partner with your home PV system? I have some experience about inverters
Types
A PV inverter is a type of electrical equipment that converts solar energy into electrical energy, and the public generally chooses the outdoor type. This type of inverter is usually naturally cooled, using air flow to dissipate heat, and does not require an additional cooling system. It has a high housing protection level (usually needs to reach IP65), requires little environmental modification for installation, and is less costly. Also, since the inverter is installed outdoors, the noise generated by the inverter operation will have a much lower impact on the user, but requires good equipment protection. It is worth mentioning that the noise index of the inverter is not higher than 65 decibels, which will not produce noise hazards.To learn more about inverter brands, you can read this article published by Maysun in the past: Top 10 Global Inverter Manufacturers in 2022
Power
Generally, according to the requirements of the system configuration of the corresponding power section of the inverter, the inverter power selected should match the maximum power of the PV cell array, generally selected PV inverter rated output power is similar to the total input power, (usually over-matching control within 1.3), so as to save costs.Capacity
The selection of inverter capacity size can be optimized according to the installation conditions. If the installation site is not clear at the early stage of design and not fully considered, you should choose a small power PV inverter as much as possible to achieve multiple independent power tracking, and if necessary, choose a micro-inverter to achieve the maximum power tracking of smaller units, so as to protect the later problems such as series-parallel mismatch caused by the site is not big enough or not regular enough, etc.
MPPT controller
In the household distributed PV system, due to the limitation of the roof, when the type of PV square, installation orientation and installation inclination are different, or when some components are shaded at certain time periods, it is appropriate to choose PV inverters with multiple independent MPPT control functions, which can configure the system more flexibly, reduce the potential system efficiency loss and power generation loss, improve power generation efficiency, and obtain the maximum power generation revenue for users.
What issues should I pay attention to when installing the inverter of PV system?
As the core component of a PV system, the inverter directly affects the system’s power generation, and the following points should be noted.
(1) As the connection between the inverter and the grid changes the impedance characteristics of the inverter, it is easy to cause resonance of the inverter itself, which mostly occurs when multiple inverters are connected in parallel.
(2) The inverter must be reviewed by a person after installation, and marked and recorded.
(3) The connection between the inverter ventilation duct and the external duct should be softly connected to prevent mechanical noise caused by mechanical vibration.
(4) When the noise of the inverter increases and there is an odor, draw attention to it, check the internal fault of the inverter, and find out the cause and deal with it as appropriate.
(5) Pay attention to the detection of inverter leakage, grounding, phase sequence, etc. during installation and commissioning.
(6) At least 2 people should be present at the same time when the inverter is commissioned, and pay attention to the safety protection of the operator.
The combination of high quality inverter and high performance photovoltaic panels can set up an excellent household distributed photovoltaic system for you, making your life greener, more efficient and more convenient.
