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Battery Storage for your Solar Panels

Battery storage for your solar panels

To find out if installing UK solar panels battery storage is right for your home and energy needs, lets take a look at what battery storage is all about and what you will need to be looking at budget wise.

Storing energy via a battery system

A solar battery stores the power created by your solar panels so you can use it when you need it later. One of the main advantages of having your own stored energy is that it decreases how often you have to rely on outside sources, saving money in the process. Furthermore, utilizing more stored energy means using less harmful methods- like carbon emissions- thereby reducing your ecological footprint as well.

What space do solar batteries take up?

The average size of a solar panel battery storage system is around the same size as a small suitcase. However, the size of the battery does vary depending on the manufacturer model that you decide to use.

So how do they work?

Solar panels gain energy from the sun and convert it so you can use it right away. They don’t have batteries to store any extra power though. If you install a solar panel battery system this will mean that any unused energy will be saved up for later.

The surplus energy produced during the day is returned to the National Grid if there is no battery storage.

How do I calculate what size battery I need?

There’s no one-size-fits-all energy storage solution, and it all depends on your household demands. Consider the following things to ensure you receive a suitable battery energy storage system:


Batteries are made up of two main components: a positive (+) and negative (-) terminal. The majority of portable devices, such as mobile phones and laptops, use lithium-ion batteries (the same ones used in most portable gadgets). These batteries are more efficient and less prone to overheat than the nickel-cadmium type (they do not require ventilation).

You may still use old-style batteries (such as those in your car) that are less expensive. Lithium-ion, on the other hand, is more cost-effective over the battery’s life.

Storage capacity

This measures the amount of energy your battery can store at any given time, which is called its capacity. The largest batteries available hold 20 kilowatt-hours (kWh) of electricity—enough to power several houses for a day. The average household in the UK uses 8-10 kWh each day.

Battery life

Solar panels outlast energy storage packs. The length of time a solar panel will last depends on the type of cell you buy, but they can last up to 30 years (some even longer). In contrast, energy storage packs only last between 10 and 15 years.

Look at the number of times the battery can be charged and discharged when comparing different battery storage systems (known as a cycle). The longer your battery lasts, the more cycles it can endure. The majority of manufacturers guarantee a minimum amount of cycles and provide warranties to that effect.


If you already have a solar PV array installed and need to add a battery, choose batteries that use alternating current (AC). If you’re thinking of installing panels and a battery storage solution at the same time, look for storage cells that use direct current (DC).

Regular maintenance

Your renewable energy storage system will require frequent tune-ups, similar to your boiler. The amount and type of maintenance it will need depends on the model you choose. Your installer can tell you more about this when they help you select a system.

Battery power backup

A few batteries will do the job if your main power is cut off. If you live in a rural area and experience blackouts often, it might be worthwhile to invest in some of these types of batteries.

So where should I place my battery energy storage system?

The ideal location for your storage battery is as close to your fuse box as possible. This will allow the battery to monitor the energy coming into and going out of your home more effectively. Batteries also work best at room temperature, so they should be installed indoors. For most people, this means batteries are often in the cupboard under the stairs or a utility room.

If you don’t have the space for a battery inside, consider installing it in your attic or garage. Batteries should never be placed outside if you want to use them at home.

Can I use energy storage for my business?

Excess energy doesn’t have to go to waste- businesses can store it for future use! Several storage options are available, and the specific battery you’ll need will depend on your business’ size and how much energy you want to generate.

The most significant distinction is that commercial battery storage may be placed outside.

So how much does solar battery storage cost?

The expense of the system depends on the type of battery you choose – which is determined by your energy usage. It will also be determined by whether you’ll have to retrofit a battery storage system or construct a new array and battery combination.

Batteries come in a range of shapes, sizes, and capacities. The most basic models start at around £1,500 and go up to £15,000 for the highest capacity of 20kWh. Installation costs will need to be budgeted for as well, with prices ranging from £1,000 to £2,000 for installation of the battery alone.

So after all of this, are they worthwhile?

It’s all about what’s most important to you. If bills and long-term savings are the most significant factors for you, you’ll need to consider the cost of putting a solar array and battery storage system in (or retrofitting) against energy expenses over your average battery life. Don’t forget that if you’re planning on staying put for the long term, it’s very likely that you’ll require at least two storage batteries while you’re there.

However, not only is the expense a factor for putting energy storage in place, but it’s also an important one. If you want to reduce your environmental effect, installing your own green energy battery storage may be a necessary component of that process.

How do I find out what the best type of battery is for me?

If you want to install a battery energy storage system, first consider how much power you use and what your needs are. Additionally, decide which features are most important to you.

An easy way to make sure you have the right battery storage is by talking with one of our experts. They will evaluate your needs and help identify which options are available to you. If you need more assistance, we’re always just a call away at 0800 0096625 or you can fill out the form on this page.

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