Can a House Run on Solar Power Alone ?

Five things you must know about solar system selection

With the global price of traditional fossil energy continues to rise, as well as the increasing requirements for environmental protection in various countries, more and more families or enterprises will choose solar power generation systems to provide clean energy for their families or enterprises, so as to save electricity costs and make their own contributions to environmental protection. However, how to choose a suitable solar power system has become a problem for many people. Here are five things you must know before you choose the right solar power system to provide clean power to your house and business.

1. The working principle and main components of the solar power system 

Solar power generation systems are mainly composed of photovoltaic panels, inverter and energy storage batteries. Photovoltaic panels convert the energy of solar radiation into direct current, but most of our electric appliance use alternating current, so it is necessary to convert the direct current from photovoltaic panels into alternating current through the inverter, and supply power to the load according to a certain frequency (50/60HZ) and waveform (pure sine wave). But photovoltaic panels can only generate electricity during the day, while many homes mainly use electricity at night. At this time, we need energy storage batteries to store the electricity generated by photovoltaic panels during the day

2. Classification of solar energy systems

Solar power systems are mainly divided into three categories: on-grid, off-grid, and hybrid. It is mainly decided by the inverter. Three types meet different demands for electricity.

 On-grid systems  are mainly used in power generation, because the requirements for environmental protection are getting higher and higher, and many countries around the world have introduced subsidies for clean energy, so on-grid  systems can bring great benefits.

Off-grid systems refer to the power generated by solar energy can only be used by ourself, and cannot be reversely transmitted to the main grid. Because the main grid is a centralized power supply, the power quality requirements are very high, and many countries have strict requirements for the characteristics of the power transmitted to the main grid.

The hybrid system takes into account the functions of on-grid and off-grid, and the electricity generated by solar energy can not only be used by ourself, but also be transmitted to the grid to obtain additional benefits.

At present, most people mainly use off-grid or hybrid solar systems. Hybrid solar systems are more expensive because of their complexity.

Although you can sell excess power to the country for extra profit, each country has special certification requirements for solar power systems that sell electricity, such as IEC50549, G99, etc. At the same time, you need to install more pv panels, it will cost much more money. So,you need to calculate how long it will take to earn back your additional investment.

3.How can I calculate how big a solar power my home needs

This is a headache problem for many people.

First, you need to know your daily electricity consumption, and the easiest way to do this is to look at your electricity bill over a year and divide it by 365 days to get a rough idea of your daily electricity consumption. Of course, electricity consumption is not average, and you may use a lot of electricity during a period of the year, then we need to calculate the cost according to the electricity price and the cost of solar power. If the electricity price is very expensive, we recommend that you install the solar system according to the highest electricity consumption, because you can quickly recover the cost, if the local electricity price is not high, you can choose a smaller solar power system, and later you can expand the solar power system when needed

Second, you need to know total power the main electrical appliances, the general electrical nameplate will be marked. If there is an inductive load, such as air conditioning, water pumps and other high-power appliances. Because the starting current of the inductive load is large, we recommend that the rated power of the inverter is 1.5 times the total power of the load.

For example, your household electricity consumption is 20KWH a day, 70% of the electricity is consumed at night, the total electrical power is 5KW, there is air conditioning, then the power of the inverter we recommend that you choose:

Inverter: 5KW* 1.5=7.5KW or more.

Energy storage battery capacity 20KWH *0.7=14KWH.

So, The size of solar power system you can choose is 8KW inverter, and 15KWH energy storage battery.

4.How to calculate the power of solar system I need?

The size of the solar system is expressed in KW. When you know your electricity consumption, you can calculate the size of the solar energy  based on the annual light intensity of your city(//solargis.com).

aking into account the installation Angle, working efficiency, etc., we recommend that the actual solar system is 1.1 times the theoretical value. Usually Photovoltaic panels can not always operate at peak power (KWP), they will reduce power generation efficiency due to shading, installation angles, and weather effects.For example, if you need a 5KW photovoltaic panel, you can install a 5.5KW solar system.

5.How do I install my solar system ?

The installation of solar power needs to take into account your specific installation location. For example, the roof, the flat, the installation Angle, the different installation environment needs to use different installation accessories, which will also affect the power generation of the solar power system. At the same time, the inverter and energy storage battery belong to the electrical equipment, in order to avoid unnecessary trouble, unless you have professional electrical knowledge, we recommend that you find an electrician to install the inverter and energy storage battery.

Conclusion of calculation for your solar power system

The choice of solar power system needs to take into account your daily electricity consumption, electrical power and the light intensity of the area. A suitable solar power system should not only be able to meet your electricity needs, but also take into account safety and economics. HT Infinitepower provides you with professional solar system solutions covering 5KW-1MW solar power generation systems. Through the intelligent APP, you can check the working status of our solar power system at any time, clearly know the working status of the system, power generation, and the remaining power of the energy storage battery. Welcome to contact us to obtain a professional solution and quote.

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