Quick Overview: Key Points Here
- The obvious thing is that you can use more solar energy through battery storage and reduce your reliance on energy suppliers.
- Normally, a single-family solar system can meet about 30% of your home’s electricity needs. While with the right energy storage device, this can increase to 70%.
- In the face of the ever-fluctuating electricity market, purchasing an energy storage system is undoubtedly a farsighted investment. A well-designed storage system can save you €500+ on electricity costs every year.
- You need to choose the right battery capacity and type according to your home needs. Any neglect of details may affect your future profit maximization.
- We hope you can understand the current market prices and major transformation options for energy storage equipment. This knowledge will help you make better decisions for your energy plan.
Quick Overview: Key Points Here
- The obvious thing is that you can use more solar energy through battery storage and reduce your reliance on energy suppliers.
- Normally, a single-family solar system can meet about 30% of your home’s electricity needs. While with the right energy storage device, this can increase to 70%.。
- In the face of the ever-fluctuating electricity market, purchasing an energy storage system is undoubtedly a farsighted investment. A well-designed storage system can save you €500+ on electricity costs every year.
- You need to choose the right battery capacity and type according to your home needs. Any neglect of details may affect your future profit maximization.
- We hope you can understand the current market prices and major transformation options for energy storage equipment. This knowledge will help you make better decisions for your energy plan.
Table of Contents
1. Some tips about photovoltaics energy storage system
Depth of Discharge
What you need to know about depth of discharge is that：Many batteries on the market are labeled with standard capacities like 5, 7, or 10 kWh. However, they often don’t deliver the full rated capacity.
This is due to variations in manufacturing techniques, materials, and factors that affect battery lifespan. As a result, the actual usable energy is often lower than the stated capacity.
For example, lead-acid batteries typically allow a most depth of discharge (DOD) of only 60%, while lithium-ion batteries can reach 80-90%. So, if you need 10 kWh of usable energy, you can choose to connect four 3kwh battery modules in series.
Battery Expandable module
As mentioned earlier, you might not find a storage battery that perfectly matches your household’s energy needs. Or, you may expect your energy consumption to increase in the future. In that case, consider buying battery modules that can be connected in parallel.
These modules should usually come from the same manufacturer. Ideally one with a good reputation and a track record to support your future energy needs
Battery operating environment
Ideally, the storage location for a photovoltaic system should be in a cool area year-round. Temperatures between 15 and 20 degrees Celsius are optimal. High temperatures can accelerate the aging process of battery cells.
Battery storage systems are not suitable for outdoor installation.Its lifespan can be shortened. If the battery is left uncharged for extended periods or exposed to temperatures exceeding 25 degrees Celsius.
BMS(Battery Management System)
We recommend that you purchase batteries with a BMS (Battery Management System). The BMS system can fully protect your lithium battery pack during use. It can accurately monitor the status of your battery, helping to prevent abnormal conditions such as overcharging, over-discharging, and overcurrent. This ensures the battery operates safely and avoids unnecessary damage
At the same time, it uses intelligent algorithms to provide data on the battery’s remaining capacity and overall lifespan. This allows you to intuitively understand the current condition and usage of your battery.
2. Benefits of energy storage photovoltaic systems
The obvious thing is that you can capture more solar energy with energy storage batteries
Solar panels capture sunlight and turn it into electricity, mostly during the daytime, especially at midday. However, most households use power in the evening or early morning. This creates a problem: photovoltaic panels alone may not be able to capture enough solar energy to meet your home’s needs.
An energy storage system can help. It stores extra power from your solar panels during the day. This stored energy can then be used at night or in the morning when solar power is low or unavailable.
Energy storage systems can help you reduce your dependence on energy suppliers
Normally, a single-family solar system can meet about 30% of your home’s electricity needs. While with the right energy storage device, this can increase to 70%.
Energy storage systems are an investment
With rising electricity prices and the growing popularity of solar energy, energy storage systems have shifted from a hobby to a profitable investment. Thanks to technological advances and larger production scales, energy storage prices are much lower than a few years ago.
More people are now choosing clean energy investments that will pay off in the next decade. This is a better option than relying on rising grid electricity prices, especially since no one knows how high future prices will go.
3. Cost and life of energy storage batteries
Higher capacity batteries may cost less than lower capacity batteries
This may seem like a confusing statement, but what you need to understand is that batteries are not just core energy storage devices. Some components need to be installed once regardless of capacity.
Although generally speaking, the price of large-capacity batteries is usually higher than that of low-capacity batteries. But when calculating the price per kilowatt-hour of electricity, large-capacity batteries are more cost-effective overall.
You need to find the battery capacity that works for your home
Very important things are:
1. The number of charging and discharging times of the battery is limited
2. Long-term high or low power will shorten the life of the device.
3. The use of power in the battery is related to your home grid system and the inverter you use.
To get the most out of the device you purchase, try to choose a battery that suits your home’s energy needs. And it is best that the battery has a matching bms system! For specific reference information, you can refer to This article by Finanztip
Generally speaking, batteries with a battery capacity of 5-15kwh can meet most household energy storage needs.
Energy storage battery life
A survey by the German Consumers Association found that the average German household charges and discharges its batteries around 200-300 times per year. Most battery manufacturers produce batteries capable of enduring 4,000 charge-discharge cycles.
This means that, in theory, most brands of batteries can last about 20 years. However, many batteries will gradually age or be replaced within 10-15 years. The good news is that frequent charging and discharging during regular use won’t significantly shorten battery life.
4. Price of 5-10kwh energy storage photovoltaic system
The following is a reference for the price of energy storage equipment that you can roughly refer to:
As a factory, we offer reasonable and competitive prices. However, we include an additional fee to cover the cost of after-sales service and maintenance. This ensures that we can provide you with reliable support even after your purchase.
Specific savings your storage system can save you
Let’s take 30 cents per kilowatt-hour as an example. A typical household consumes about 5,000kwh of electricity annually.
The total electricity price is: 1500 euros
If you have 8kw photovoltaic solar panels + 10kwh energy storage system. Then you probably only need to pay 26.4% of it which is approximately.
396€. 39.3% of this is saved by your energy storage system, which amounts to approximately 589.5 euros. The remaining 34.3% is provided by your photovoltaic solar panels, saving 514.5€ per month. The approximate price of a 10kwh energy storage system including installation costs is approximately: 6,500€. More profits can be obtained by applying for subsidies and selling excess power.
From a ten-year perspective: without installing an energy storage system,yourelectricity bill in ten years will be approximately:9855€
Electricity cost without energy storage:(396+589.5)*10=9855€
Electricity fee with energy storage:396*10=3960€
Energy storage saves electricity bills:589.5*10=5895€
Total electricity cost =(device price)6500 +(electricity fee)3960-
(electricity fee saved by energy storage) 5895 = 4565€
Total savings: 9855-4565=5290- an average of 529€ per year!
Ps: This calculation process is theoretical. You need to consider other expenses such as maintenance, accessories, photovoltaic systems, etc., as well as additional income such as subsidies and electricity grid connection
But what can be seen is that, under normal circumstances,investing in an energy storage system is a matter of long-term benefit.You need to take a long-term view of the energy market
and plan for your future energy use.After all,no one knows what the market price of electricity will be like in the future.
5. Solutions for energy storage transformation of existing photovoltaic systems
If you’re interested in energy storage systems and want to upgrade your existing home photovoltaic system but don’t know where to start.Don’t worry. We’ve got you covered.
Below, we’ll introduce two common energy storage modification models available on the market. We’ll also explain the advantages and disadvantages of each to help you make an informed decision.
Classic photovoltaic energy storage system
(we recommend this mode to you)
We recommend this method as the best option. A powerful hybrid inverter serves as the core of the system, connecting your photovoltaic energy storage system to both the home grid and the power grid. This setup ensures that your photovoltaic power generation is fully utilized.
The network structure is relatively simple, which reduces energy loss in the system. As a result, you can gain more benefits from your photovoltaic energy storage system.However, there is one concern: many inverters in existing photovoltaic systems may not support the hybrid function.
You’ll need to contact the manufacturer to check if your inverter can be upgraded. Not all manufacturers or models support upgrades, so confirm this with the manufacturer.If an upgrade isn’t possible, you may need to purchase a new hybrid inverter to complete your photovoltaic system. Keep in mind that this could increase the overall cost of your battery purchase.
Simpler photovoltaic energy storage transformation model
If you already have PV panels and matching inverters installed at home and don’t want to replace the inverter. We offer another solution for you.With this option, there’s no need to make major changes to your existing PV system. You only need to purchase suitable batteries and inverters to connect them to your home grid.
This solution is simpler to implement compared to the first one. However, it adds more circuits and equipment, which means energy utilization will decrease due to higher energy loss during conversion.
The advantage is that you don’t need to install complex hybrid inverters or modify your existing grid. The initial cost is likely lower than the previous solution, but the long-term benefits in terms of energy efficiency and sustainability will also be lower.
Specific transformation costs
Every household has different grid conditions and energy needs. When choosing a photovoltaic energy storage system for your home, it can be difficult to find relevant examples or experiences. You may feel unsure about how to choose between different products.To address this, we have developed a complete photovoltaic storage solution.
Our system includes fully compatible components, inverters, and batteries, eliminating the confusion caused by conflicting information online.Additionally, we offer excellent after-sales technical support. Our professional technicians are ready to help you with any issues during installation or use.If you’re interested in optimizing your home energy system or learning more about our products, please contact us for assistance.
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