Solar inverters
In today’s world of energy sustainability, solar panels are becoming ubiquitous, providing clean energy from renewable sources. However, the key component that allows this energy to become usable for households is the solar inverter. This blog explores the two main types of solar inverters: string and microinverters.
String inverters – The power of simplicity
String inverters, installed on the house, represent a traditional approach to converting direct current (DC) from solar panels into alternating current (AC) needed for household appliances. Their strength lies in their simple design – usually only one household inverter is sufficient. However, the problem arises if one panel in the row has problems. In this case, the entire array loses efficiency, which can mean a reduction in energy production.
Microinverters – increasing panel efficiency
In contrast, microinverters are placed under each solar panel, allowing each panel to operate independently. This means that if one panel has a problem, the rest of the system continues to operate without loss of efficiency. This technology is suitable for complex installations with panels on multiple roofs or with partial shade during the day. However, although microinverters provide high efficiency, repairs can be challenging due to their under-panel position.
Advantages and disadvantages of string inverters and microinverters
| Advantages: | Disadvantages: |
| Simple troubleshooting | Problems with efficiency in the shade or problems with individual panels |
| Low price | Difficulty expanding the system |
| Simple system design | Additional equipment required to meet rapid fire regulations |
| Advantages: | Disadvantages: |
| They meet the requirements of quick extinguishing | Difficulties in repairs |
| Easy system expansion | Higher costs |
| Panel-level performance monitoring | More equipment on the roof |
Leading brands in the solar inverter market
When it comes to choosing a solar inverter, it is important to consider the leading brands on the market. Two names that often stand out are Enphase and SolarEdge.
Enphase
Enphase is without a doubt the leader among microinverters. Their products are reliable and widely accepted by installers across the country. In addition to excellent technology, Enphase has built a reputation for excellent customer support.
SolarEdge
SolarEdge, on the other hand, dominates the string inverter and DC optimizer market. Although they are known for their long experience and widespread use, some reports indicate a less positive experience with customer support.
Other respected brands
In addition to Enphase and SolarEdge, other well-respected brands such as SMA, GoodWe and Fronius are also appearing on the market. Although they may not be as popular, these brands still provide reliable equipment that keeps your solar system running.
How to choose between string and microinverter
When considering the choice between string and microinverters, it is crucial to consider the specifics of your home and solar system installation.
String inverters
If you have a simple roof, with panels placed only on one side, and you don’t have problems with brightness, a string inverter with the addition of a DC optimizer can be the right choice. This gives you the advantage of maximizing energy production at a lower cost.
Microinverters
Microinverters are ideal for complex installations with panels on multiple roof surfaces or if the panels have partial shade during the day. Although they are more expensive, you can achieve greater savings in the long run by maximizing the production of each individual panel.
Consideration of costs and long-term savings
When planning your solar system, price plays an important role.
String inverters
String inverters are initially cheaper than microinverters, but the additional cost of an optimizer or fast shutdown device should be considered to keep the system compliant with electrical regulations. Also, it is important to consider the shorter lifespan, which can result in replacing the inverter before the end of the panel’s lifespan.
Microinverters
Microinverters have more installation costs, but their long-term advantage comes in the form of increased efficiency, performance tracking, and longer lifespan. This investment can result in greater long-term savings on energy bills.
The future of solar inverters: hybrid inverters
The development of technology continues unstoppably, and hybrid inverters are becoming more and more popular. They connect panels, batteries, the grid and your home into a unit that enables efficient and integrated use of solar resources. However, their popularity is declining as batteries come with built-in inverters.
