In addition to the panels, the inverter is also a key component of a solar photovoltaic system. This device converts the direct current from the solar panels into alternating current.
Lifetime
Although the life of the inverter depends on environmental conditions, it should generally be replaced every 10 years. For most households, this device should be installed in a well-ventilated area to avoid overheating.
Although manufacturers claim that their units last up to 25 years, it is unclear if this is actually the case. Instead, they usually use the term “microinverters.” These devices are installed on top of solar panels.
Number of inverters.
Ideally, a home solar system should have a central inverter to avoid overloading it.
Sizing
Proper sizing of the solar panels and inverter will help maximize their efficiency. For example, a system with a maximum output of 3.3 kWp would require an inverter of 3.5 kWp.
In most cases, it is also recommended to under-size the inverter to avoid over-sizing the solar panels.
Before starting the project, it is important to consider the slope of the solar panels and the presence of shade on them. In these cases, it is usually better to connect the solar panels to a separate MPPT.
Do I need a transformer?
Another thing to consider when choosing an inverter is its efficiency. A model without a transformer will allow the device to achieve 97% efficiency.