3 What is the solar roof system? What is the difference?

Many people are better known for the principle of solar roof is to convert light energy from the incident sun on solar panels to electricity, but the resulting electricity is direct current, so an inverter is required to convert direct current to alternating current electricity so that it can be used on home electricity in the daytime or stored in a battery for further use.

The solar roof system in use today has three main systems: off-grid, on-grid and hybrid systems.

1.Solar roof "Off-Grid System"

Off-grid photovoltaic systems are not connected to electricity (also known as Stand Alone), so they do not need permission from electricity. Primarily focus on solar electricity during the day. Solar energy passes through the inverter (power conversion device), turning direct current into alternating current electricity for use in the home during the day. But if you want to use it at night, there must be a battery backup, which is still quite expensive, so it is suitable to invest in places where electricity from electricity does not reach, such as remote areas on high altitudes.

2. Solar roof "On-Grid System"

Photovoltaic electricity in the on grid system is connected to the system of electricity. Before installation, public sector permission must be obtained before reaching 3 agencies: 1) district or municipality, 2) MEA or regional electricity (PEA), and 3) Energy Regulatory Commission. Solar electricity generated from daylight sunlight will be used for home electrical appliances / equipment first. If more electrical equipment is used than the power generation system, it will draw electricity from electricity (at the same time, if more electricity is produced than used, it may be sold back according to government conditions. On-grid systems are not able to back up lights at night, so they are suitable for homes or factories / buildings that use a lot of electricity during the day.

On Grid is currently the most popular system for homes, buildings or factories because it has the fastest break-even point.

3. Solar roof "Hybrid System"

It is a mixed system between on-grid and off-grid photovoltaic systems. The electricity produced by photovoltaic in the daytime is first used on home electrical appliances. If left, it is stored in a battery to back up the lights for use at night or in the case of power outages. It only needs to be used on power supply points, appliances / designated electrical equipment such as corridor lights, air conditioners, fish pond water pumps, ventilators, etc., before installation, it needs to seek government permission as well as on-grid systems. It is considered to be the system that manages electrical energy in the home most efficiently and seems to answer the problem for many homeowners / buildings, but because of the power backup system or batting system. It also has a relatively high price, so it still doesn't look worth investing, making it very unpopular.

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