Photovoltaic batteries 2021 - 2022
How much does a solar storage system cost? battery (and it's worth it trouble;)
Are Solar Batteries Cost Effective?
Some of the most important factors in the cost of a solar battery are the chemicals that make up the battery, the battery life cycle, the storage capacity and the usable capacity. These factors can cause the cost of the storage system usually ranges between 1.200 and 6.000 euros
Introduction to the knowledge of lithium batteries
Lithium batteries for photovoltaic is a type of rechargeable battery that uses graphite or other carbon materials as a negative electrode and lithium-containing compounds as a positive electrode. It is a type of battery that uses lithium metal or lithium alloy as a positive / negative electrode material and uses a non-aqueous electrolyte solution. Informations
Also, since the life of a solar battery storage system is 5 to 15 years, the battery may need to be replaced several times during the life of your solar panels (usually 15-30 years), increasing your annual cost.
If you are not at home during sunny hours, the home battery storage system is definitely useful. Your solar panels will be able to store electricity for use when you are at home after dark.
Suffice it to say that the cost of a solar battery storage system is not cheap, but the benefits of having something more than offsetting the cost if implemented effectively.
If you want to enjoy the convenience provided by solar battery storage systems, fill out the form above to receive up to 4 customized offers from our trusted solar battery suppliers and installers. This service is offered free of charge and without any obligation.
What you will read in our Guide
Why do you need a solar battery storage system?
How much do solar panels cost?
How to reduce your costs
Types of solar panels
What is the lifespan of a solar battery?
What is the best solar battery?
Why do you need a solar battery storage system?
Pairing solar panels with solar panels is a relatively new but effective practice. There are four basic ways you can benefit from solar panel storage:
Save energy for future use
Significantly reduce your energy costs
Make Money Selling Stored Energy On The Grid
Become independent of the grid
First, a solar panel stores the energy produced during the hours of sunlight and makes it readily available for use in non-productive hours, such as at night or on cloudy days, allowing your home to run 100% renewable solar energy all year round. twenty-four hours, provided that the demand for electricity does not exceed the supply that can be provided by the battery.
In addition, the backup power of the solar panel can significantly reduce your energy costs. By charging the solar panel during peak hours and discharging it during peak hours, you can avoid having to pay a lot for electricity from the utility company. Saving on this can help reduce the cost of your battery system.
In addition, you can save money by selling the energy stored in your solar panel back to the mains when the electricity prices are at the highest level - if the utility allows you to clean measurement.
Finally, by adding a solar panel battery to your solar system, you can choose to be independent of the national grid at any time, thus ensuring energy security for your household. Of course, the number of solar panels you need to install for this will vary depending on your energy requirements and budget.
When is it ideal to install one?
A solar battery storage system is best used in conjunction with a solar photovoltaic cell. Fortunately, if you already have an existing board, it is relatively simple to add a solar panel to the mix. And if you do not have one, both systems can be purchased in parallel to make your home run on fully renewable energy sources.
The two technologies complement each other to reduce the cost of your storage system, making your range of solar panels much more efficient. If you are thinking of becoming green, there is no better time to start taking advantage of the money you can save with your monthly electricity bill.
Solar battery storage systems offer a variety of types of batteries to choose from, along with many advantages such as more environmentally friendly performance, longer life and easier installation.
How much do solar panels cost?
Currently, the cost usually ranges between 1.200 6.000 and XNUMX XNUMX depending on the capacity, the chemical composition of the battery and its life cycle.
The cost of a solar panel is in a similar state as when solar panel technology was new. As the adoption of solar battery storage systems becomes more widespread, their price will of course follow the same downward trend as the cost of solar panels.
Lithium ion solar panels are the most common and cost effective batteries of all kinds. The table below provides a reduction in lithium ion costs based on usability.
Lithium-ion battery cost
Usable capacity (kWh) Estimated value (lithium ion batteries)
3 - 4 kWh From £ 3,410
4 - 7 kWh From 4,288 £
7 - 9 kWh From 5,185 £
9 - 13,5 kWh From £ 5.920 Get your offers now! It only takes 1 minute
Lithium ion and lead are two chemicals commonly found in batteries used for solar panels. Despite the higher estimated price, lithium ion batteries still enjoy a larger market share thanks to their longer lifespan and higher usability.
The table below explains in detail why lead-acid batteries are comparatively cheaper in the short term, but lithium ion fits better if you consider future replacement fees.
Cost of different battery materials: Lead-acid versus lithium ion
Features Acid lead battery Lithium ion battery
Preliminary cost 2.000 £ 4.000 £
Storage capacity (kWh) 4 kWh 4 kWh
Exemption depth (DoD) 50% 90%
Life cycle 1.800 4.000
Cost / kWh / Cycle * 0,556 £ 0,278 £
* Cost / kWh / cycle = preliminary cost / (storage capacity × DOD ζωής life cycle)
Battery material
Different materials have different effects on the discharge rate and the life of the product. For example, lithium ion batteries can discharge 70% -90% of the total storage amount while lead-acid can discharge only about 50%. And lithium-ion batteries have at least twice the lifespan of lead-acid batteries. Higher discharge rates and longer lifespans usually lead to higher prices.
Capacity
Storage capacity refers to the total amount of energy your solar battery can store, and usable capacity is the amount that one can use, which is usually calculated from the discharge depth (DoD).
The amount of storage capacity and usable capacity, measured in kilowatt hours (kWh), directly affects the cost of your solar battery storage system. Higher capacity means it can store more energy and support a larger area, therefore it will result in a higher price.
Lifetime
Life cycle is an important indicator of the lifespan of a solar battery storage system. The more cycles a solar battery can provide, the longer it can operate normally. Given that the lifespan of solar panels is about 25 years, replacing a new solar battery may increase future costs.
Installation
The cost of installing solar panel storage systems varies slightly depending on the size and may be covered by some brands. In general, it is more economical to set up your solar battery system when installing solar panels.
How to reduce your costs
Even though the cost of a solar battery storage system may not be modest, you can find some ways to save money. There are currently funding opportunities for solar panels in the UK.
With Smart Export Guarantee (SEG) you can save money on exporting stored electricity back to the grid. Export duties vary depending on the energy supplier, but a good price ranges between 4-6p / kWh.
Prior to SEG, Feed-in Tariff (FIT) was in effect. FIT has rewarded homeowners for using renewable energy sources such as solar, as well as for exporting electricity to the grid. FIT expired in 2019 and no new applications are being processed. Those registered with FIT will continue to receive payments until the end of their agreements.
Solar battery storage system
Types of solar panels
RV / Marine Solar Batteries - Marine solar batteries are suitable for smaller systems and are used on boats and by RV owners. In addition, these types of solar panels work best when no other form of electricity can be generated, due to the lower capacity for continuous maintenance.
Flooded type - Flooded type batteries are lead acid batteries that have caps for adding water. These types of batteries are not very expensive to buy and have a good lifespan compared to Marine solar batteries. Flooded batteries are recommended for outdoor use as they emit gas when charged. If, however, they are installed indoors, then it is highly recommended to use a ventilation system to extract gases, which can be explosive and toxic.
Gel - Unlike the flooded type, sealed gel batteries have no fans and do not release gases. Because of this, ventilation is not important and these batteries can be used indoors without risk. The advantage of this is that the battery will have a more stable indoor temperature, leading to increased maintenance, and therefore work better than the flooded type.
Absorbent glass (AGM) batteries - A glass layer is used between the plates to hold the electrolyte. These types of batteries are waterproof, which means that they do not release gas during charging. Apart from this, Glass Mat batteries also have superior performance, making them the best types of batteries. They have all the advantages of sealed gel types, but they are of the highest quality. Other advantages include the fact that they maintain a better tendency, self-discharge more slowly and ultimately last longer. Of course, their superiority means that they are the most expensive of the four types.
What is the lifespan of a solar battery?
The average lifespan of a solar battery storage system is about 5 to 7,5 years for lead-acid and 11-15 years for lithium-ion batteries. However, all batteries are vulnerable if overcharged or exposed to extreme weather conditions.
Discharge Depth (DoD)
Depth of charge (DoD) means how long you can use the battery before recharging. Just as it can be harmful for your phone battery to be left with only 2%, the same goes for a solar battery storage system.
If you use 100% of the charge or exceed the DoD limit before charging, the service life will be significantly reduced. For example, if you buy a solar battery storage system that has a capacity of 5 kW of energy storage and 80% DoD, remember to charge it before using the full 4 kW to extend the life of the battery.
Compared to lead-acid batteries, lithium-ion batteries can handle a wider range of temperature changes and have a higher level of tolerance if discharged improperly. These advantages lead lithium ion batteries to gain a larger market share.
What is the best solar battery?
A decent solar battery storage system can make your life better and save you extra costs. In the table below you can find a list of the popular brands of solar panels batteries.
Cost of different battery materials: Lead-acid versus lithium ion
Brand Usable Capacity (kWh) Cost Battery Material Warranty Life Cycles Discharge Depth (DoD)
Tesla firewall 13,5 kWh From £ 5,500 lithium ions 10 years Unlimited * 100%
SolaX 3.3 3,5 kWh From 4.010 λι Lithium ion 10 years 6.000 95%
LG Chem RESU 6.5 6,5 kWh From 3,043 λι Lithium ion 10 years 6.000 90%
Powervault 3 4 kWh From 4.470 λι Lithium polymer 10 years> 6.000 100%
8 kWh From 7,020 λι Lithium polymer 10 years> 6.000 100%
* Within the warranty period
Installing a solar battery storage system can make your life more comfortable all year round without worrying about the weather. As it becomes more common in private use, it is important to make a wise investment and choose the most economical product.
The realization of such a great market requires thorough research and comparison of different offers, which can be very time consuming. We will be happy to help you find the solar battery storage system that suits your home and budget. By filling out the form above, you can get up to 4 free, no obligation quotes from our trusted suppliers, saving time and money.
