2023 4 Best Solar Battery in the UK [Full Comparison]

best solar battery in uk

The use of solar batteries has been on the rise over the past few years. It helps to save a lot of unused power. There are multiple benefits that solar batteries provide, such as increased sustainability, lowered energy cost, increased reliability, etc.

But, on the other side, it could be challenging to choose the best solar battery for your system. When there are so many such brands available, it could be difficult for you to choose the best solar batteries among them. But worry less now, as in this article we will discuss what is the best battery to use for solar panels UK?

Part 1: What is Solar Battery and How does It Work?

The solar battery is a type of battery used to store excess electricity produced by solar panels. This stored energy could be used during the time when the sun is not available such as nights, cloudy days, etc. Without solar batteries, you would not be able to take complete advantage of the power you are generating from panels. These batteries could be charged by even regular inverters. So, you might have understood how useful solar batteries are for homeowners or even others. But how do these batteries work? Let’s understand.

what is solar battery

Here is an overview of how solar batteries work:

First of all, the solar panels you prepare take energy from the sun and produce electricity. This is what we call direct current (DC) electricity. It flows through an inverter to produce alternating current (AC) electricity. This generated AC electricity is used to provide power to home appliances. The remaining electricity is then used to charge the solar batteries.

Part 2: How to Choose Solar Battery?

Factors that should be considered while choosing solar battery:

  1. Personal requirements:

Whenever you want to make a decision about buying a solar battery, always start with your personal requirements. Consider the factors such as your budget, priorities, energy consumption requirement, your solar rooftop system, and the climate and geography of the place where you live.

  1. Technical features of battery:

Next, you should consider the technical features of the solar battery, which involves:

  1. Battery size:

The size of the battery ranges between 2kWh to 20kWh and even more. If your requirement is to consume 0.75-1 kW energy per hour, then a battery of size 10 kWh would give power for up to 10 to 12 hours and a battery of size 13 kWh would give power for up to 13 to 16 hours.

  1. Energy capacity:

Energy capacity of solar batteries refers to how many and which appliances you would be able to charge. You should decide the capacity of the battery according to your charging requirements. Most of the solar batteries available in the UK provide an output of approximately 5kW.

  1. Round-trip efficiency:

This is the factor which is known as the percentage of electricity put into storage that could be saved for later use. In general, the round-trip efficiency of solar batteries is 80%. Keep in mind that maximum the round trip efficiency, less energy will be lost in the storage process.

  1. Depth of discharge:

Depth of discharge is nothing but the amount of energy one can utilize out of the solar storage system. If your solar battery is of 8kWh and DoD of 80%, the maximum you can use is 6.4 kWh.

  1. Battery Lifetime:

Do consider the battery lifetime of the solar batteries while buying. This means that the battery works as new after getting charged and discharged for so many times.

  1. Safety:

Though solar batteries are quite safe, consider safety as an important parameter while buying them.

Part 3: 2023 Best Solar Battery in the UK

Here is the list of the best 4 solar batteries in the UK in 2023. Read below to gain detailed knowledge about them.


BLUETTI AC200MAX is one of the best solar batteries that one could use in the UK. It is the first modular, expandable power station. It comes with a 2200W full-power pure sine wave inverter and 2048W ultra-durable LiFePO4 battery. Further, the BLUETTI AC200MAX solar batteries come with 2 BLUETTI B300 (3072 Wh each) or B230 (2048 Wh each) battery modules. With a 400W adapter and 900 W solar input, the battery gets charged in less than 2 hours. These are perfect for various occasions and to fulfill your charging requirements without getting worried.

Features of BLUETTI AC200MAX:

  1. With the BLUETTI app, you can control and monitor them smartly.
  2. Fast dual charging (AC and solar adapter).
  3. Maximum solar input: 900 W.
  4. 7 different ways to recharge, i.e. AC+Solar, Dual AC, Lead battery, Generator, Car, Solar, and AC.

bluetti standby generator ac200max

2. BLUETTI AC300+B300

BLUETTI AC300+B300 is a 100% modular solar battery. These are best to fulfil your requirements during emergencies. It provides a capacity of 12,288 Wh, whereas it can support a maximum of 4*B300 (3072 Wh per pack) battery modules. Further, the battery could support the total input rate of 5400W*. The batteries are capable of receiving approximately 2400 watts of solar charging input and can be charged in 1.5 hrs. To make you more worryless, the BLUETTI AC300+B300 also comes with a 4 year extended warranty.

Features of BLUETTI AC300+B300 Solar Batteries:

  1. Smart app control and monitor.
  2. 2400W max. solar input.
  3. 7 different ways to recharge and i.e. AC-Solar, Dual AC, Lead Battery, Generator, Car, Solar, and AC.
  4. Fast Dual Charging (Solar + AC Adapter Simultaneously).

bluetti ac300b300 solar battery generator for house

3. BLUETTI AC500+B300S

BLUETTI AC500+B300S is an expandable power system to help you get the most out of your solar energy. Whatever the purpose of the storage, these batteries are suitable to fulfill your requirements. It supplies unlimited power to the user without any failure. These batteries can charge approximately 6*B300S or 4*B300 and could provide an overall capacity of 18,432 Wh and 12,288 respectively. Further, the battery can take up to 3000 W solar input and can get fully charged in 1.5 hours. Also, it adopts an advanced Battery Management System (BMS) and LiFePO4 battery. This guarantees optimal performance, longer life cycles, and higher security during operation.

Features of BLUETTI AC 500+B300S Solar Batteries:

  1. 4+1 years warranty.
  2. Smart app control (Bluetooth and WiFi connection).
  3. Tie to the home grid for 24/7 UPS.
  4. 16 versatile outlets for 99% of devices.

bluetti ac500 b300 home battery backup for house


BLUETTI EP500Pro is the best solar battery that could be efficient for the whole family for up to 1 to 2 days. It could be used for cabin workshops, family camping trips, or to organize a whole party. It comes with a 3000 W rated pure sine wave AC inverter and a 5100 Wh LifePO4 battery pack. For incredible durability and safety, it provides an advanced battery management system. Further, these solar batteries come with built-in dual-core microcomputers as well as an internet connection. You can charge your laptops, air conditioners, and even your electric vehicle with this.

Features of BLUETTI EP500Pro Solar Batteries:

  1. Smart touchscreens.
  2. Movable power station.
  3. App remote control.
  4. Off-grid and on-grid energy storage.

bluetti ep500pro power station for house

Part 4: Comparison between the Best Solar Battery in the UK


Usable Capacity


Battery Type

Warranty Length




2048 Wh



4 years


1300 W Max. Fast Dual Charging (Solar + AC Adapter)


3072 Wh



4 years

3500+(to 80%),6000+(to 50%)

Fast Dual Charging (Solar + AC Adapter Simultaneously).


3,072 Wh~18,432 Wh



4 + 1 years


(Dual AC/AC+Solar)).


5100 Wh



5 years


8 ways-

Part 5: People Also Ask about Best Solar Battery in the UK

1. How to install solar battery?

You might have a question about how to install solar batteries. Then the answer is here. The installation of solar batteries can be a little overwhelming sometimes. But when it comes to BLUETTI solar batteries, except BLUETTI EP500Pro, none of the batteries need installation. You just need to plug them in order to play.

2. What is the longest lasting solar battery?

The longest lasting solar battery is the one that runs for the maximum amount of time after charging. In general, there are 3 types of solar batteries available and that are saltwater, lithium-ion, and lead acid. Out of the 3, lithium-ion batteries provide the charging capacity for the maximum time period.

3. How long will a 5kw battery last?

In general, a 5 kw battery lasts for approximately 10 hours. This is when you are using it for just a few appliances including fridge, TV, and few lights. Moreover, if you use it to charge any heavy duty appliance including air conditioners, then it might get drained very soon.

Final words

Whatever your requirement with solar batteries, you might always search for what is the best quality battery for solar panels?. As we all know, the solar market in the UK is very diverse. So, we have prepared a list of the 4 best solar batteries in the UK. We have given a detailed description for all 4 batteries so that you can make an informed decision before purchasing. These 4 BLUETTI solar batteries are the best in every way and are known to provide the best services to their users. So, whenever you are up for buying a solar battery in the UK, do consider the above-mentioned factors and comparison.

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