Do you want to get the most out of your solar panel system? Then buying a solar battery will be the perfect solution. If you have a solar panel already installed or plan to get one, you must add a solar battery.

It’s because solar batteries let you use the energy generated by your panels more.

The combination of PV panels and solar batteries has become popular for reducing energy bills. With an efficient solar battery storage system installed at home, you won’t depend too much on the energy supplier. As a result, more savings!

If you’re planning to get a solar battery anytime soon, this post will tell you all about it. Without further ado, let’s get started!

What is a Solar Battery Storage?

A solar battery storage system stores the energy your solar panels generate. The batteries work during the day and store all the electricity they can. At night, when the PV system can’t produce power anymore, the batteries come into play.

Battery storage systems let you power your home and various appliances even if the sun goes down! So, you can utilize the energy generated more efficiently without depending upon an external source.

Batteries for commercial backup and off-grid power systems have been in use for a long time now.

Most of these battery storage options were expensive, which put a cap on their buyers. But with solar battery storage systems, you get the most cost-effective and reliable performance!

That’s why tech giants such as Tesla and Samsung are focusing on developing solar battery storage. So, if you plan to go solar, a solar battery is a must-have.

Why Do You Need Solar Battery Storage?

During the day, solar panels produce a lot of energy by harnessing the power of the sun. Depending upon the energy efficiency of the solar panel, it might have some extra energy.

Without a proper power storage system, the excess power might be transferred to the National Grid.

That’s when a solar battery storage system will help you store the excess power and use it wisely! Aren’t they amazing?

Let’s look at the top benefits solar battery storage systems have to offer –

Uninterrupted Power Solution

Solar BatteriesSolar panels work better when there is ample sunlight outside. But if the weather is a bit dull, cloudy skies can reduce the power output. When the amount of energy your installed solar panels produce decreases, you might have to rely on the grid.

With a solar battery system by your side, you don’t have to worry too much about bad weather. Be it cloudy skies or rain showers; their energy storage won’t be hampered.

So, the energy created by the panels which aren’t utilized during the energy production is stored by the batteries. You can conveniently use this generated electricity when there isn’t much sunlight without drawing power from the grid.

Secure Power Supply

Solar battery systems can offer backup power when the electric supply is fluctuating.

It will be extremely useful if you live in an area having outdated electrical supplies. With aging infrastructure, the chances of frequent blowouts and short circuits are high. Home battery systems will protect you from any event of a power supply accident.

Also, even if the grid becomes unstable and supply is hampered, solar battery systems will provide you power. This way, you can add a layer of security to your power supply.

Quiet Operation

Are you annoyed by the sound of your generator? Have your neighbours complained about it? No worries, as solar battery systems operate silently and don’t make annoying noises. So, if you have a standard generator and want an upgrade, go for a solar battery storage device.

These storage systems are also more power-efficient than your regular generators, so it’s a win-win for you!

Less Pollution

Standard power generators run on fossil fuels and cause air and noise pollution. In addition, most of the electricity generated in a power grid uses fossil fuels.

In both cases, the devices consume a lot of resources and hamper your environment in the process.

By installing a solar battery, you can reduce your carbon footprint, keeping the surroundings clean. As these solar batteries use fewer resources, they produce less waste. Furthermore, many solar batteries can run for more than ten years and reduce environmental pollution.

Types of Solar Batteries

Solar batteries are of various types based on reliability, efficiency, usage, and durability. Let us take a closer look at them to understand their differences.

Lithium-Ion Batteries

These batteries are among the newest additions to the solar battery family and are gaining a lot of limelight.

Lithium-ion batteries are used in electric cars, most importantly the Tesla Powerwall. The company connects multiple Lithium-ion batteries and compiles them using a liquid-cooled battery pack. Tesla manufactures loads of these batteries for their Tesla Powerwall project.

A Lithium-ion battery has a longer life and is famous for being extremely durable. They have a longer depth of discharge than most batteries. So, at 70-80% discharge level, the number of cycles you’ll get will be around 4000 to 6000.


  • They come with a shelf life of almost two decades, around 15 to 18 years
  • They have a better depth of discharge than lead-acid batteries
  • Having high storage capacity and modern battery technology
  • They are most suitable for home solar installation


  • More expensive than lead-acid batteries and most battery types
  • A lithium-ion battery has higher chances of electrical accidents

Lead Acid Batteries

Solar Battery HouseThey are perhaps the most popular solar battery options and have been in use for decades. You can easily find a lead-acid battery in your car. But for any solar PV system, a lead-acid battery will look different, usually taller.

To charge your residence, the lead-acid battery system will contain multiple batteries. You have to keep them in a cool and shaded area, away from bad weather.

No matter how many new batteries try to outshine it, Lead-acid batteries will always stay well-loved due to their excellent reliability. In addition, these are used in a variety of fields due to their affordability.

Lead-acid batteries are excellent options for off-grid solar systems.


  • Excellent performance at an affordable rate
  • Reliable and uninterrupted service
  • You can easily recycle and dispose of these batteries
  • Compatible with many solar power systems


  • They occupy a lot of space and might emit hydrogen gas
  • Heat can damage these batteries and reduce their life

Flow Batteries

Flow batteries have a water-based chemical solution inside them, which gives rise to the name. There is a zinc bromide electrolyte flowing between two chambers inside the battery.

When the batteries are charged, the chemical reactions within let the device store energy.

You can consider them an evolving technology having excellent performance. They are best suited for any commercial solar PV system. However, some companies are developing these batteries for residential purposes.

They have become extremely popular for offering maximum depth of discharge. It is way more than lead-acid and lithium-ion batteries. So you can discharge it completely without affecting its shelf life.


  • They offer a lifespan of 4000 cycles with great power storage
  • They can survive extreme temperatures
  • The chemical inside is fire repellent, so no chance of thermal runaway


  • They are more expensive than most solar batteries
  • Flow batteries have low storage capacity

Nickel Cadmium Batteries

Nickel-cadmium batteries (Ni-Cd) are another excellent option but not as popular as Lithium-ion or lead-acid batteries. They have been in use since the 1800s and late 90s and were quite popular back then. But, the rise of modern solar battery technologies has put Ni-Cd batteries in the backseat.

They are widely used in the aircraft industry. As no harmful chemicals are used while developing them, Ni-Cd batteries are safe options. Along with this, these batteries can be used in a wide variety of temperatures.

Usually, they are used for a large utility solar PV system or other large-scale installations.


  • They have an extremely durable structure and require no maintenance
  • They are completely recyclable and don’t need any e internal cooling system
  • No battery management system required
  • 80% depth of discharge (DOD)


  • Not very good as a backup power option, as they don’t hold much charge
  • You might face problems while disposing of these batteries

Frequently Asked Questions

After checking out the pros and cons of the various solar batteries, you might have understood what you need. If you still have doubts, these questions will offer you some clarity.

Where Should Solar Batteries be Stored?

Unlike solar panels out in the sun, you must keep your solar batteries inside. As a rule of thumb, you should keep your batteries in a cool and shaded area. The please should be good enough to protect your batteries from harsh climatic conditions.

Also, the place needs to have proper air circulation. It’s important as some batteries might emit harmful gases search is hydrogen. To shield yourself from these fumes, you need to keep those batteries in a well-ventilated place.

So, it would be best if you keep your batteries in a durable and insulated box. Then, place the box in your garage or an enclosed space.

Is Solar Battery Storage Worth It?

Solar BatteryYes, solar batteries are the most efficient way to store solar energy. These batteries have commendable storage capacity and also offer excellent performance. This allows you to store the power generated by solar PV systems properly and use it anytime you want.

Solar battery storage is also a safe power conservation option that protects you from electrical accidents.

The offer of a reliable source of backup power with good power output. Most of these products come with a reasonable warranty period and have a long shelf life.

How Do I Keep My Solar Battery Healthy?

The first step in keeping your solar battery is healthy is to store them in a weatherproof place. Ensure that they are not exposed to too much water or heat. It will automatically enhance their shelf life.

Then, you need to reduce the number of batteries if possible. Using multiple batteries can increase their resistance and lead to unstable charging. Try to use not more than four batteries to keep the entire storage system healthy.

You also need to ensure that the batteries aren’t uncharged for a long time. When batteries sit idly for too long, they can get damaged and might not work properly.

So, always check whether the charging cable is connected and the source is turned on.

How Much Power Can a Solar Battery Store?

The amount of energy or power a solar battery can hold depends upon its design, use, and storage capacity. Smaller battery systems can hold 2 kWh of power, while larger systems can store up to 8 to 10 kWh.

Suppose your solar battery can store 18 kWh of power and has a power of 6 kilowatts. Then, you’ll be able to charge the battery at a maximum rate of 6 kilowatts. It will take 3 hours to get it fully charged.

High-efficiency batteries such as the Tesla Powerwall can store up to 13.5 kWh of solar energy. Therefore, a five kw solar PV system will take around 3 hours to recharge the batteries.

Wrapping Up

Even if the sun rises every day, it might not shine brightly as you expect. Having a solar battery storage system at home will help you brighten up those dull days. Offering you an eco-friendly power backup solution, solar batteries help protect the PV system.

When you are out shopping for a solar battery, always keep certain factors in mind. These include battery capacity, usable capacity, depth of discharge (DoD), warranty, and lifespan. In addition, you need to consider how much power you want to draw using them.