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Solar Battery FAQs

Evergreen Solar Power – Solar Battery FAQs

Solar Battery storage is used to store energy generated by your solar panels so that you may use it later at night or when the weather is overcast. There are a lot of people in the UK unfamiliar with this field, and as such they have a lot of questions about what batteries can do, what types are accessible, and how much they cost. We address the most frequent questions about using a battery in your home in this home battery FAQ.

Because the solar sector is changing at such a rapid pace, if you discover an error here, please let us know so that we may correct it.

I have an existing system – Can I add a battery?

Batteries are available in two distinct varieties: alternating current (AC) and direct current (DC). The batteries we’re referring to are all AC, which means they may be retrofitted to any solar PV installation on the market.

What are the advantages of having solar panel batteries?

You can store your solar energy and use it when you need it, which reduces your dependence on the grid and makes you more self-sufficient. Some batteries can also help to prevent blackouts, which may be an issue for some people. They may have a generator, but they want to swap it for a battery since they don’t want to depend on their power source in the case of an emergency.

I’ve heard that there are two types of batteries, what are these?

There are two types of solar batteries that we talk about, these are Lithium-Ion and Lead Acid. Each has its pros and cons so lets take a look:

Lead Acid

The tried and true technology of the solar battery world is lead acid batteries. These deep-cycle batteries have been utilized to store energy for a long time, dating back to the 1800s. And they’ve persisted thanks to their dependability

Lead acid batteries are divided into two categories: flooded lead acid batteries and sealed lead acid batteries.


The cheapest energy storage option is lead acid batteries, which make them the most cost-effective. They are also trustworthy. Furthermore, because the technology has been around for years, they may be simply disposed of and recycled.


Flooded lead acid batteries need ventilation and maintenance on a regular basis to function properly, which raises the risk of the battery leaking.

Lead acid batteries are also prohibited from being placed on their sides, which limits how flooded they can get. They have a low depth of discharge (DoD), therefore they must be charged more frequently.

The lifespan of lead-acid batteries is between 5 and 10 years, which can be significantly reduced if they are deeply discharged.

Best for use

Lead-acid batteries are highly resilient and can be used in off-grid solar systems or for emergency backup storage in the case of a power outage.

Lithium Ion

Batteries with a higher energy density and longer cycle life are becoming more common. Lithium ion batteries, on the other hand, are still relatively new to the market.

As electric car use began to grow, EV producers recognized the potential of lithium ion as a storage solution. They swiftly rose to become one of the most frequently used solar battery banks.


Lithium ion batteries require very little upkeep.

They also have a higher battery energy density, which means they can store more energy in a given area than a lead acid battery.

The rechargeable lithium-ion batteries have a longer life cycle and are more durable, lasting between 10 and 20 years when properly cared for. This longer lifespan is due to the fact that lithium ion batteries have a greater depth of discharge, allowing you to utilize more of the energy stored within the battery before it must be recharged.


One of the most significant drawbacks of lithium ion batteries is their higher price.

Lithium ion batteries are also more prone to catch fire as a result of their chemical interaction. Thermal runaway is what causes lithium ion storage systems to be more likely to burst into flames. The likelihood of your battery catching fire, on the other hand, is virtually nil if installed correctly.

Best for use

Lithium ion batteries are ideal for residential solar installations since they can store more power in a confined area and allow you to utilize more of the energy stored within the battery, allowing you to power a house.

OK so how do I find the right battery for me?

The finest battery for a residential solar system in most cases is a lithium ion battery.

They can store more energy in a smaller amount of space, release the majority of their accumulated power, and have high efficiency. Furthermore, because these are the most popular, many solar firms will be able to install a lithium ion solar battery correctly and securely since they are commonly used.

If you’re on a budget, lead acid batteries are an excellent alternative. For years, they’ve been utilized, and they’re inexpensive.

I’m still confused?

If you are still not 100% sure of which way to go in terms of purchasing the right battery for your solar power system then get in touch and we can help you to make an informed decision. We have both the experience and expertise to provide professional and accurate advice.

Give us a call on 0800 0096625 or email us at any time, day or night and we will endeavour to get back to you as soon as possible.

Please also remember that incorrect installation of solar power batteries can be dangerous, you should always seek the help of a professional.

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