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Electric Breaker

Electric Breakers

When installing a solar panel system, you have to be familiar with the electric breakers and how it works with a solar PV system to avoid future electric problems. The electric breaker is one of the main components of a solar power system that provides safety mechanisms. If ever the electrical wiring of your system has too much current flowing through it, these breakers can easily cut the power until your solar installer can fix the system’s problem. 

For today’s article, we will discuss electric breakers and their function in solar photovoltaic systems.

What is an Electric Breaker?

An electric or circuit breaker is an electrical switch designed to protect electrical circuits from damage caused by overloading of current or a short circuit. The basic function of an electric breaker is to prevent the current flow once protective relays detect a fault in the system. 

Although it is frequently interchanged with a fuse, which is the simplest Over Current Protection device (OCPD) in electrical circuits, a circuit breaker, is a much-evolved type of device that interrupts the current flow. The main difference between the two is electric breaker is resettable and the fuse is not. The fuse sacrifices itself while protecting the system to overheat, while the circuit breaker can withstand hundreds and thousands of operations. Another difference is that electric breakers are used with relatively higher currents. 

Components of Circuit Breaker

A circuit breaker system is composed of three parts. These three components are the sensing system, relay, and the combination of contacts and the contact actuator. A sensing system is responsible for detecting an overload situation, while a relay is responsible for transferring the information to the switching arrangement, and the combination of contacts and the contact actuator. This electric arrangement is usually observed in power transmission and distribution networks dealing with very high currents, voltages, and powers. 

Circuit Breakers Calculation in Solar Panel Systems

When connecting circuit breakers to the PV system, you have to follow the recommended calculations to avoid future problems and damage to the entire system. The recommendations for using overcurrent protection devices including circuit breakers in solar modules against overloading conditions are given in IEC 60269-6 (volume 6 of IEC 60269-6) and also UL 248-19. 

For circuit breakers, IEC recommends a 20% and 25% margin in voltage and overload current. Most of the time, the ratings are specified by the solar manufacturers at given ambient conditions. If the temperatures exceed this given value, derating must be applied according to the manufacturer’s specifications. 

When it comes to breaker sizes for solar panels, NEC requires the breakers to be sized at 125% of the inverter’s rated output. So a 7680W inverter that outputs 240V, outputs 32A (7680W ÷ 240V = 32A). That requires a 40A breaker (32A x 125% = 40A).

Final Thoughts

If you owned a solar panel system at home,  you have to understand how circuit breakers work to prevent catching fires at home. These devices are one of the major components of the PV solar system as they protect the system wiring from getting too hot and accidentally catch fire if short circuits occurred. Thus, understanding the breaker itself and its proper calculations in the PV system should be done.

Wholesalers

Solar Products Wholesalers 

Wholesaling refers to buying some products or goods directly from its manufacturer usually at a discount and then reselling it to the retailers for a comparatively higher cost than the original. Basically, wholesalers handle products and package them in small quantities and then sell them to retail customers, either for commercial or personal use. 

Many industries have wholesalers, and that will not skip the solar industries. Nowadays, many solar wholesale stores/firms are operating across the globe, making it much easier for retailers to go solar. Sometimes retailers find it hard to reach direct manufacturers of solar products because some companies do not have their solar stores/shops in public, with that they are not also offering solar products per piece. Through wholesale solar stores/shops, these individuals can easily buy the solar products that they need to replace or maintain their solar systems. 

If you are in need of solar product suppliers for an individual purpose, you may visit some solar outsourcing marketplace to get an updated list of solar wholesalers near your location. There are many solar platforms that provide enough information and data about the solar industry in your region, including all the reliable solar wholesalers in town.

Italy

What is Solar Energy in Italy?

The solar energy in Italy has seen a major surge in this industry among other European countries such as Germany, Turkey, Spain, and the Netherlands.

In July 2005, the country started its first “Conto Energia” program to support the development of renewable power, and the result so far has been remarkable. In 2018, Italy added solar PV capacity of 437 MW, and its PV market grew by 7%.

The major driving factor in the Italian PV market has been solar rooftops, and the number of solar installation projects with more than 1 MW capacity increased in in 2017 and 2018.

Italy is considered the country of sunshine which makes the nation very favourable for the installations of solar energy production plants and farms. In Central-Southern Italy, the annual solar radiation can range from 4.7 kWh per square metre per day, and 5.4 kWh per square metre per day in Sicily. While the other regions also have a very high solar energy production potential making Italy one of the leading countries for the production of solar energy, as well as in the sector of research and technological innovation.

The solar energy in Italy has seen a major surge in this industry among other European countries such as Germany, Turkey, Spain, and the Netherlands. Italy’s PV market is known as one of the photovoltaic markets that definitely deserve a place in the solar energy spotlight. In fact, during the first ten years of the new millennium, Italy was on the third spot after Germany and Spain to experience a significant boom in solar installations after encouraging the citizen through government incentives. This made most of the manufacturers and citizens embrace and support solar power.

In 2010, The Montalto di Castro Photovoltaic Power Station was completed and it is considered the largest photovoltaic power station in Italy with 85 MW solar capacity. Along with this largest PV power station, there are also other large PV plants like Cellino San Marco with 42.7 MW capacity, San Bellino with 70.6 MW capacity, and Sant’ Alberto with solar capacity of 34.6 MW.

Aside from conventional solar PV technology, Italy is also known for its developing concentrated solar power (CSP) technology. To function efficiently, this concentrated solar technology requires higher direct solar irradiation, which makes the country suitable for this technique as Italy has more exposure to sunlight. Furthermore, the southern regions including the islands of Sardinia and Sicily also offer good conditions for CSP technology, the reason why the Italian government provided large investments to promote this solar power development.

Currently, there are three solar plants running in the country. The first one is the Archimede solar plant, which was installed on the island of Sicily in 2010, attaining a solar capacity of 5 MW. Moreover, planning and promotion for the CSP technology will undergo several additional projects which would add another solar capacity of 360 MW, annually.

As of now, Italy for being known as “sunshine-blessed” country is currently the second-largest market in Europe in terms of installed solar power generation capacity. Which then, achieved over 20 GW of photovoltaic (PV) power plants in 2018. This year, the Italian solar power market is expected to enter a new series of growth, particularly investing in “grid parity” projects that mostly rely on corporate power purchase agreements (PPAs).