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Off-grid solar power systems- 

An introductory guide

Do you need off grid solar power systems? Off grid solar power systems mean power is getting from the sun- sometimes diesel or the electrical grid for backup.

To make this possible, you need to install a solar power system with battery storage.

The off-grid solar systems are very useful in a place where the power is not stable, usually cut off for no reason. Or a place where no electricity grid at all, they will need an off-grid solar system to supply the power.

If you&#;re thinking of buying  off-grid solar systems for your home, you&#;ve come to the right place. Before you buy one off-grid solar system, you can get useful information from this blog. In this blog, we will help you how to figure out do you need an off-grid solar system or not, and tell you how to buy the right one to meet your need.

What are off-grid solar power systems?

Many people think only of solar panels and batteries when they hear "off-grid solar". But there are many other components to getting complete off grid solar power systems.

As off-grid solar systems operate battery power first, and diesel or grid electricity for backup when battery power run off. They are also called standalone solar power systems according to it working mode.

Unlike on-grid solar power systems, off-grid solar systems rely on batteries to provide power when the sun isn&#;t available.

Batteries, a very important component in the off-grid solar system, are to keep the solar power in the batteries, they are costly - and usually have a limited life span. We call it cycle time. Different type of battery has different cycle time.

What are the different uses of off-grid solar power systems

One of the biggest advantages of solar as an energy source is solar panel quantity and battery quantity can be designed according to different needs. It's very flexible and varied in use. Usually, there is three-phase and single phase. For someplace, there is split-voltage as well.

It works from small system to big system, from small home system, all the way up to a system that can power a factory.

Here are some of the most common applications of off-grid solar system:

For camp small cooker appliance
Powering the appliances in an RV
Generating electricity for home
Being the main electricity for the hotel, hospital, and factory.

What equipment do off-grid solar power systems require?

Here&#;s a list of all the equipment required for a functioning off-grid solar system:

Solar panels
PV combiner
Solar charge controller
Solar inverter(s)
Solar battery
Bracket for solar panel
Cables and accessory

How to size an off-grid solar system?

We will size an off-grid solar system in 3 steps.

• The first step is to calculate the inverter power.
• The second step is to calculate solar panel quantity.
• The third step is to calculate battery quantity.

1. Calculate the inverter power

For example, if you need an off-grid solar system for home use, and have 1set BTU air conditioner, we suggest to use 5kw inverter.

Because for pump and for constant frequency air conditioner, there are motor inside, we call them inductive load. The start working current may reach 4-6time than rate power. That's why when the air conditioner start working, the light will flash in one time.

For 1set BTU air conditioner, the power is 750w. And they will get 4-6time when start to work, so we will need a bigger inverter to supply power. That's why we need a 5kw inverter for 1set BTU air conditioner.

Additional reading:
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Are you interested in learning more about Off Grid Power Solutions? Contact us today to secure an expert consultation!

2. Calculate total electricity usage needs

For example, if you have 3sets 100w fan, every day using 6hours, and have 1set 250w TV, using 5hours every day.
Then total consumption would be:

You can list all the appliances you plan to use, and how many hours you&#;ll be using each of them. This is to get daily consumption, to calculate how many solar panels you will need in the off-grid solar system.Knowing how many kWh in a day you&#;ll use will allow you to size your solar panel array, as well as the solar battery storage.For example, if you have 3sets 100w fan, every day using 6hours, and have 1set 250w TV, using 5hours every day.Then total consumption would be:

                         3set * 100w * 6hrs+ 1set * 250w* 5hrs= wh

If you have 6hours good sunshine

Then you will need

Then you will need

                         w ÷ 6hrs ÷0.8factor = 635w

So you will need at least 2pcs 320w solar panel.

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3. Decide on battery storage capacity