Useful guide to find best lithium off grid battery

Useful Guide To Find Best Lithium Off Grid Battery

Off grid battery is used to store solar energy that is obtained by off grid solar system. Off grid batteries in an off grid solar system enable you to completely rely on the electric energy obtained from the sun being off grid.

In the off grid solar system there are mainly two ways to extract the solar energy, one is to get electric power directly, during a sunny days and another way is to store solar energy in the lithium off gird batteries and then later use it to get electricity for your home. Lithium off gird batteries is efficient for storing maximum electric power from the sun during the daytime and enable you to use it, when there is no sunshine like in the nighttime or in the cloudy and rainy weather. It is then used to supply electric power to fulfill your load demand by your equipment.

Off grid solar system is perfectly designed in a way that it can produce maximum energy on a sunny days to meet the required load demand by the equipment during the daytime, along with its additional ability to save energy side by side in the lithium ion battery bank. That’s why it is important to expertly design your off grid solar system which should importantly include reliable off gird batteries.

Having a reliable off grid battery backup will make you feel freedom from all tensions like power outages from the grid during your peak working hours, disturbing your workload and schedules. As you will be only on off grid solar system supported by a strong lithium ion battery bank for power backup.

If you want to know more about off gird lithium ion batteries, then this blog is for you, keep reading.

Which is the best batteries for solar off grid?

Off grid battery is the lifeline of any off grid solar system. As the electric energy produced by the off grid solar system is stored in the batteries. So it will be your battery bank, which will decide how long it will be able to provide you power backup. That’s why you must have a durable and efficient off grid battery for power backup, to keep your equipment running even without any minor stoppage. The decision about the selection of a suitable battery involves technical calculations like which type of battery and why it is best for your solar off grid?

Other important measures and features involve the efficiency and performance of the battery, the capacity of the off grid battery, and power of the battery. Another main factor that you must consider before deciding about the off grid battery is its cost.
This blog will help you choose the right battery for your off grid solar system.

Types of Off grid battery

The selection of an appropriate off grid battery is an important as well as a difficult task because it is necessary to understand your demand as well as the performance, compositions, and characteristics of the battery you are going to choose for your off grid solar system.

Based on formation, off grid battery banks is of two major types:
i.Lead acid batteries
ii.Lithium ion batteries.

To decide which off grid battery bank is suitable for your off grid solar system, among these two categories, need detailed information and knowledge about the off grid battery.

Lead acid batteries for off grid systems

Lead acid battery can be used for off grid solar systems. It then comes in two categories, flooded lead acid battery, and sealed acid battery. Lead acid battery bank is cheap and recyclable but it requires maintenance on daily basis. It is not a durable and reliable battery bank. So we will never recommend you any battery which will let you stranded at nowhere.

Lithium ion batteries for off grid systems

Lithium ion batteries for off grid systems are advanced technology and are getting popular among their users.The use of Lithium ion batteries for off grid solar systems has grown faster in the last few decades. One of the main reasons for its popularity among its users is its durability and highly efficient performance.

Important features of Lithium ion batteries

Lithium ion batteries have unbeatable features, which make them more suitable for the applications like off grid solar systems. As it has 98% efficiency and scalability. Lithium ion batteries have more energy density which makes them lightweight and compact in size.
Lithium ion batteries usually offer good storage capacity, and it does not require any maintenance.

Lithium ion battery has a high charge and discharge rate. Lithium ion battery is more safe and more recommendable as it uses smart battery technology.

Understand your Lithium ion batteries for off grid system

Lithium ion batteries for off grid system are actually rechargeable batteries used for solar energy storage solutions.
The reason behind the popularity of Lithium ion batteries for off grid system is mainly its incomparable quality and features that is, its capacity, high depth of discharge of the off grid battery bank, its effective performance, Lithium ion battery does not require maintenance, and it has a long lifespan.

• Capacity of Lithium ion batteries for off grid system
Capacity of lithium ion battery used for off grid solar system is measured in Kilowatt-hours (kWh), watt hours (Wh) or amp-hours (Ah).

For example, a lithium ion battery with voltage of 12v and capacity of 100 amp-hours (Ah) will permit power storage of only 100 amp-hours (Ah) x 12v = 1200watt hours (Wh) or 1.2 Kilowatt-hours (kWh).

• Depth of discharge (DoD) of Lithium ion battery
Depth of discharge (DoD) of a battery is the percentage of the capacity released by the battery to its rated capacity. Lithium ion battery has a deep cycle as they have high depth of discharge (DoD). Which indicate that lithium ion battery enable you to use stored electric power for longer time period.

• Lifespan of Lithium ion battery
Performance of the off grid battery bank can be checked or measured by comparing two different energy levels. That is, the total consumed energy whilst it was on charge with the total energy that is available in the battery bank. So for your better understanding, you should know, if its performance is highly good, it is more economical. In terms of percentage you should look a battery bank whose performance is 80% or more, that will be more suitable and good for you.

Lithium ion battery has a long lifespan due its high DoD. Usually it has 2500~5000 cycle life.That’s why Lithium ion technology batteries are unbeatable in terms of lifespan and are the king in the field of batteries

Can I use Powerwall off grid?

Powerwall is the off grid solar system is backup protection system, consist of the integrated battery system. Which has the ability to store solar energy during the daytime. This stored energy can be used when your solar system doesn’t produce electric power, so it will keep your all utilities running without any interruption.

It is actually used along with a solar systems to deliver benefits to the consumers. In the off grid solar system, powerwall is a smart system with the ability to detect and adapt consumers’ energy demands. If Powerwall is connected to the internet it can also add new features.

Applications of Powerwall in off grid solar system

There are numerous applications of powerwall. Like, it is efficiently able to detect and fulfill the power needs of your building or house. It can store maximum energy from the sun and make you self-sufficient to fulfill your all needs in the no sunshine times and supply maximum power without any interruptions.

Need of Internet connection for powerwall

In the off grid solar system, the Powerwall works with internet connections or cellular connections. Make sure your internet connection should be stable. If your powerwall has stable internet, it can self monitor your energy system and update new features if required. Otherwise it is able to work without internet or cellular connections but in that case, it will only operate on the latest settings without any further updates or additional features.

Powerwall for existing off grid solar system

Powerwall can be installed in your existing off grid solar system and it can be integrated with the solar inverters.

How long do off grid solar batteries last?

Off grid solar system is designed to fulfill the electric load demand for your utilities during a sunny days. But your off grid battery is able to store the electric energy during a sunny days, and can deliver it, at night time or on a cloudy day.

In recent years lithium ion batteries for off grid systems are getting more common as it is the reliable battery to store energy from your off grid solar system. You can integrate your solar system with lithium ion off grid batteries because it has a long lifespan, which is the most important feature of the off grid battery bank.

Lifespan lithium ion batteries for off grid systems

Lithium ion batteries for off grid systems have a 2500~5000 cycle life. It means during the total lifespan of your off grid solar power system, you will need once to replace your Lithium ion batteries for off grid systems.

Off grid lithium ion battery is highly recommended for your off grid solar system. As it provides more reliable power storage ability, it is lightweight, compact size, with a high depth of discharge rate which is mostly 80%. And Lithium ion batteries make your solar power backup, more reliable.

How much battery storage do you need to go off grid?

Off grid solar batteries are used to store solar energy from your solar system. If you don’t have enough battery bank to power back your appliances when there is no sunshine for example in the night or cloudy weather. It will cause you to run out of power. So to avoid power interruption you need a strong and reliable battery bank for electric power backup.
Here we we recommend, Lithium ion battery bank for your off grid solar system as it is most suitable in terms of durability, capacity and reliability

Now you have to decide the size of your battery bank.

Off grid battery storage sizing

The size of your off grid lithium ion battery is highly dependent upon the usages of energy. That is how much energy is required by you to meet the needs of your building.

Calculation of off gird load

For example in your home, different appliances consume 1000Watts of power for 10hours per day then, then your load in kWh will be calculated in the following way.
1000Watts x 10hours = 10kWh per day
Or

Off grid lithium ion battery

10kWh x 1.2 (for 80% depth of discharge) x 1.05 (inefficiency factor) = 12.6 kWh
For example, 24 kWh = 500 amp hours at 48 volts → 500 Ah x 48V = 24 kWh

How many solar batteries are needed to power a house?

If you want to rely on off grid solar power system to power your house then you must own a reliable and durable battery bank that is significantly efficient to meet the needs of your house.
For your house off grid battery system, you should understand some important factors which are necessary to know and analyze that, how many batteries are necessary to power your house.

Electric Energy Usage by a house

In order to know how many batteries are needed to power, a house is mainly dependent on the calculation of the electric load, demanded by all appliances in a house.

• Measure of electricity used by the appliances in a house

Kilowatt-hours is the measure of electric energy consumed by the appliances in a house. The energy demand of 1kWh is equal to the consumption of 1kW for 1hour or consumption of 100Watts by a device for 10 hours. An average house in a developed country uses 900kWh of electricity in a month or 30kWh of energy in a day.

Number of batteries

Your off grid battery system should be strong enough to be able to supply power to your appliances for a couple of cloudy days. For that, you need to do some calculations.
For Example:
Electric power demand by an average house for three consecutive days will be 90kilowatt-hours (90 kWh). In this case, your house will need at least 38 off-grid back batteries. Along with this, you will need a few more batteries to power your off-grid solar system’s auxiliary components like inverters, etc.

Are lithium ion batteries good for off grid solar?

Pros and Cons of Lithium ion off grid battery

If you plan to go for off grid solar system then you must be equipped with a reliable, efficient, and durable off grid battery bank. And no doubt off-grid lithium ion battery bank for your off grid power system is exactly, efficient and reliable as compared to other available batteries.

Lithium ion battery bank is a perfect choice for your off grid usage to power your backup. Lithium ion battery is highly demanded due to their high efficiency and longer lifespan.

In lithium ion battery technology the best for off grid solar applications is lithium iron phosphate batteries which are formulated as LiFePO4.
It has more efficient power usage. The biggest advantage of lithium iron phosphate battery technology is, it lasts longer and other advantages include no maintenance, no gas ventilation, etc.

Price of Lithium iron phosphate batteries

Due to highly admirable results and long lifespan, Lithium iron phosphate battery is significantly liked by consumers as compared to other batteries. Although it is expensive lithium iron phosphate battery has a higher cycle time so in the longer run, this price is more affordable and highly recommended for your off grid battery system

How many solar panels do I need for 400ah lithium battery bank?

Nowadays in the technology-driven life of humans need strong backup off anything. Similarly, it is important to keep backup from your off grid system which will deliver power on demand. For that purpose, you need to keep your batteries fully charged and ready for perfect backup.

Size of solar panel to charge 400ah lithium battery bank

The size of solar panels or the number of solar panels depends on numerous factors like the depth of discharge, how long in the day hours when sunshine is available for the solar panels, and the available time period for which you want to charge your off grid battery system.

For example, a off grid lithium ion battery with 12volts and 400amp-hours needs a set of solar panels that could produce approximately 4800 watts of power.

Lithium ion off grid battery bank, if needed to charge within a single sunny day, let say in 5-6 hours, then following is the solar panel suggestions to fully charge 400ah off grid battery bank.

•3 number of solar panels if single panel is of 400W
•3 number of solar panels if single panel is of 350W
•3 number of solar panels if single panel is of 300W
•5 number of solar panels if single panel is of 200W

12volt and 400ah lithium ion battery which discharges at 50% need
4 number of solar panels if the single panel is of 300W to charge a lithium ion battery in 5-6 hours.

How long does it take to charge a 400ah lithium ion battery

To answer your question “How long does it take to charge a 400ah lithium ion battery” please remember that, exact time cant be decided or assured in how long time a off grid lithium ion battery with 400ah and 12volts will need to fully charge from the given solar panels. It is dependent on many factors like what is weather conditions, how strong is the sunshine, and how many and what power solar panels are placed to charge the off grid lithium ion battery.

How do I extend the life of my lithium ion batteries for off grid systems?

It is very desire of every off grid consumer to keep its off grid system long lasting.

Lithium ion batteries for off grid systems are commonly used in off grid solar system mainly because of its strong and admirable features. So to answer this question that how to extend or increase the life of your off grid batter bank please notice the important factor, properties and conditions of off grid batteries. Lifespan of a off grid lithium ion batteries depends on 3 major factors which will definitely extend the lifespan of a lithium ion battery. And these 3 factors are mentioned below:

• Cycle life of lithium ion off grid battery bank
Cycle life of lithium ion off grid battery bank is use to determine the lifespan of a battery. Lithium ion off grid battery usually has a capacity and ability to deliver 2000 cycle life.

In your off grid battery bank try best to use the least number of batteries. Because more batteries will increase resistance consequently it will result in unequal charging so it is necessary to regulate the number of backup batteries.

Don’t let your batteries overcharge and over-discharge. It is recommended, to keep your lithium ion battery to 80% charge.

It is best to not over-discharge it, which will affect the life of lithium ion batteries.

• Temperature of lithium ion battery bank
Temperature is really important factor to extent the life of your battery bank.

Is it possible to use 12V battery in Off-grid system?

Yes, it is possible to use a 12volt battery in off grid system because it is standard to use for your off grid solar system.
As many other auxiliary components and devices in the off grid solar system usually run at 12 volts only. So to use 12 volts battery bank for your off grid solar system is normal.