Solar invertersSolar Power Grid Systems

Types Of Solar Power Inverters And How They Work In The Solar System?

Different types solar inverters

Basically, there are 3 types of solar power inverters for inter-tied grid or off grid installation

A solar system contain several key components, with inverters being one of them. When PV (photovoltaic) panels of solar system absorbs the sun light, it produces direct current (DC) energy. As most homes use AC (alternating current) energy, direct current (DC) energy on its own is not useful. Solar inverter plays the very crucial role of converting the electricity produced by solar modules into a form that can be used at home. One can say, it turns the DC energy into AC energy, which is then channelled into home to power lights and other electrical or electronic appliances.

Basic Solar Power Inverters are String inverters, Micro inverters and DC optimizer.

These solar inverters vary in how they functions, costs and the installations each are best suited for.


String inverters

String solar energy system inverterAre most commonly used inverters, as they are the most affordable option among the 3 types. In a solar power system with an installed string inverter, all panels are linked together in a series. String inverters work well in system, where strings of panels are placed on a single plane without any shading or obstruction and can get consistent sunlight throughout the day.


Micro inverters

Micro solar energy system invertersInverter work by having a smaller or mini inverter installed on each individual solar panel. Each mini inverters not only convert the DC energy to AC energy right there and then, but also manage grid connection. These inverters are a great solution for shading issues, as each panel perform individually and isn’t affected by function of other panels. Micro inverters work well for complicated roofs with objects that can obstruct sunlight.


DC optimizer

DC optimisers solar energy systemAlso known as power optimizer and are the newest of all threes inverter types. They are like a combination of string inverters and micro inverters. DC power optimizer​ can be selectively installed to individual panels on a string inverter that are affected by shade and then will prevent the shaded panels from affecting the overall performance of the entire string.

Generally speaking, each type has its own unique advantages and disadvantages. The solar inverter best suited for your installation will depend on factors specific to your own property and desired system characteristics.

Solar Inverter’s Parameters

Solar Inverter typeAdvantagesDisadvantages
String inverters* Ideal for owners looking for low cost solar systems.
** Easy to maintain, normally placed in an easy-to-access location.
*** Well developed and more supported technology among the 3 types.
* Even if just 1 panel is partly shaded, the performance of all the panels will drop.
** If only one panel fails, the whole system ceases to function.
Micro inverters* Individual panel’s performance is unaffected by the others.
** Even if any panel fails, the others will continue to generate power.
*** Performance of individual panels can be monitored.
* Solar power system with micro inverters cost a lot more than with just a string inverter.
** Repair or Maintenance can be difficult, as they are located on the roof.
DC optimizer* DC optimizer cost less than micro inverters.
** Helps to produce significant energy even when some panels are not performing well.
*** Performance of individual panels can be monitored.
* Solar power system DC optimizer cost more than with just a string inverter.
** Repair or Maintenance can be difficult, as they are located on the roof.

It can be difficult to choose the best type of inverter for your system, as there are many conditions to take into consideration.


types of solar power inverters

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