An average family will have about consume 30% of the green electricity it produces via its solar panels. The other 70% is fed into the distribution network and is later taken back, but then it is impossible to check the origin of the electricity taken. Even when your family has a contract to buy green electricity, the electrons can come from anywhere: a nuclear power station, a gas power station, etc. This is why we call it 'grey' electricity. This is why we call it 'grey' electricity.
With a home battery you store your excess renewable energy yourselfresulting in a self-consumption of 60 to 80%. A world of difference.
Every situation is different and requires a customised calculation. The necessary amount of storage capacity of your home battery depends on your consumption profile, the strength of your inverter, the appliances you use and the locally available electricity production. To get a first estimation of this, you can use our calculation tool.
We advise you to have your specific situation examined by one of our certified partners. They will analyse your specific situation and elaborate a tailor-made proposal. A list of our partners can be found here.
With a solar panel installation of 2 to 3 kWp or more, it can already be interesting to install an AlphaESS home battery to increase your own consumption.
This is a theoretical possibility, but we certainly wouldn't recommend it. The best approach is to have more panels installed and to charge the car directly from the solar panels as much as possible. This is a form of smart charging. The surplus of your solar energy is stored in your home battery and can be used for domestic consumption when the sun goes down.
We also wrote an more extensive article.
Currently every Smile home battery already has 2 programmable contacts. These are fully operational for the Smile B3, Smile 5, and Smile T10. With these outputs you can control certain consumers in a smart way. For example: when your home battery is fully charged and your solar panels produce more energy than you use at that moment, you can send the surplus of energy to the charging point of your car. The "receiving" devices must of course be able to "accept" this signal. So always discuss this functionality with your trusted installer. Contact us Or contact one of our partners for more information.
In the future, more and more smart appliances will be marketed that can be controlled wirelessly. The AlphaESS home batteries are equipped for this.
This is not the purpose of a home battery. With a home battery that is properly tuned to your situation you will very often be able to get by for 24 hours, but this will not be the case during longer periods with little sun. This is not only the case in the winter of course. On a yearly basis you will be able to be independent from the electricity grid for 60 to 80%.
Every situation is different and requires a customised calculation. The amount of storage capacity needed for your home battery depends on your consumption profile, the strength of your inverter, the appliances you use and the locally available electricity production.
On our website you will find a simulation tool that will give you an idea of the investment cost. Are you interested and do you want a custom quote including installation costs? Then feel free to contact one of our partners or contact us.
Since August 2019, there is a Flemish premium for individuals who have a home battery installed of €250/kWh useful storage capacity, with a maximum of €3,200. From 1 April 2021, the premium will change. You will then be able to count on a premium of €300/kWh, but at the same time the maximum amount of the subsidy per installation will be reduced to €2,550. In the coming years, the subsidy for home batteries will be systematically reduced to zero in 2025.
AlphaESS home batteries meet the technical conditions for the subsidy.
If you want to connect a home battery to an existing solar panel installation, you must have your installer check whether your existing inverter can be set to meet the 60% injection limit.
The latest updates on subsidies and government legislation can always be found in our NEWS OVERVIEW.
This depends very much on your specific situation. Factors that can strongly influence this are:
We have not only made numerous simulations with specialised software, but we also regularly study the results that are actually achieved in practice with the AlphaESS home batteries. We generally see payback periods of 8 to 10 years.
However, a home battery offers many more personal benefits, so just looking at payback time is not enough:
Yes, the AlphaESS home batteries are all expandable. You can do this up to 3 years after purchase of your system, under the same factory warranty conditions. Later is of course also possible.
A battery system from AlphaESS is a total package. You don't have to buy any additional components (such as a separate battery inverter). This not only reduces the complexity of installation and use, but you will also have only one point of contact in the event of problems.
We'd like to explain this using our battery cycles. One cycle is the complete charging and discharging of a battery. In the AlphaCloud monitoring platform you can see graphically how much your battery has been charged or discharged on a given day. You'll see that you rarely get to a full cycle per day.
Studies have shown that in our climate and with a battery system that is properly matched to your situation, about 280 cycles per year are needed. So over 20 years you will need about 5,600 cycles. AlphaESS assures that after 10,000 cycles the drop in storage capacity of the home batteries will only be 10%.
If in the future you were to use your home battery for other applications besides optimizing your own consumption (e.g. virtual power plants), the number of cycles you consume per year will increase slightly.
The systems of AlphaESS are designed and tested to last 20 years. AlphaESS inverters have a standard 5 year warranty. AlphaESS also guarantees that after 10,000 cycles the storage capacity of the home batteries will only drop by a maximum of 20%. The complete warranty conditions can be here read the full warranty conditions.
When you purchase an AlphaESS home battery, you get free lifetime access to the AlphaCloud, AlphaESS' online and real-time monitoring platform. This can be done via a web browser or the app, which is available for both iOS and Android devices.
The app will allow you to extensively monitor the energy flows in your home. So you can easily follow what your solar panels produce, what your energy consumption is, how much energy is in your battery, and so on.
You will need an internet connection to monitor your home battery usage in real time. If the connection is temporarily lost, the data is stored locally in your AlphaESS system at that time and will be uploaded to the AlphaCloud servers when your system comes back online.
AlphaESS home batteries are maintenance-free. The internet connection allows the system's software to receive regular updates.
No, the AlphaESS home batteries are only delivered and installed by certified AlphaESS partners. Our certified installers will be able to propose a system tailored to your needs.
Moreover, you can only apply for a subsidy if the home battery is installed by a certified electrical fitter and is subsequently inspected by an inspector.
The AlphaESS home batteries are available from stock. When concluding the contract with your installer, a date for installation will be mutually agreed upon.
The AlphaESS home batteries are compact systems, certainly in comparison with, for example, saline or lead-acid systems. The systems are placed against a wall and are 25cm deep. The height and width of your system depend on the type of AlphaESS home battery that is most suitable for your situation. There are also several possibilities to place a home battery in your area, since the modules can be combined above or next to each other. A Certified AlphaESS partner will work with you to determine the best location for your system.
The installation must be inspected by an independent body. You need this inspection report to register your home battery with your grid operator.
This registration must be done before you apply for a subsidy. Your fitter will advise and assist you in this process.
To ensure optimal operation of the AlphaESS home battery, we recommend that the system not be placed in an area where there is severe frost (temperatures below -10°C) or where it gets extremely hot (temperatures above 50°C).
To make installation easier, we recommend having the home battery set up as close to your fuse box and fixed internet connection as possible.
Usually this is not the case, but a Certified AlphaESS partner will certainly look into this for you before the system is installed.
After installation, an internet connection is required for registration and login of your system. A permanent and fixed internet connection to the AlphaESS home battery is required to make use of the full functionality.
The internet connection will allow the AlphaESS service team to push updates to your device, if necessary, as well as track and fix any malfunctions. An internet connection is therefore required in order to benefit from the full 5 year warranty on the inverter. warranty of 5 years on the inverter.
The Smile 5 and Smile T10 systems have a hybrid inverter. You can directly connect solar panels to it (= DC coupling).
All AlphaESS home batteries can be connected to an existing PV system. We call this an AC coupling. An AlphaESS system is completely independent of your existing solar panel system and can therefore be installed at any time.
In Belgium, different grid connections are possible depending on how heavy your connection is and in which region you are connected. The most common connections are:
In some regions there is also a variant where no Neuter is available.
For each of these grid connections, a suitable AlphaESS home battery and connection method can be found. You can easily connect a single-phase battery system to a three-phase grid connection, but not all combinations are possible. Get advice from one of our certified partners.
Yes, you can. When connecting, 3-phase EnFluRi meters are used. These meters will ensure that the required power of the battery will be compensated on the 3 phases.
Two consumers each need 500 Watt at a certain moment and are connected to phase 1 and phase 2, for example. The battery system is connected to phase 3, and there is currently no demand for energy on that phase. The AlphaESS system then measures how much electricity is needed in total over the 3 phases at that moment (in this case 1000 Watt). This electricity is made available on phase 3 because the home battery is connected to that phase.
Because there is no consumption on phase 3 at that moment, the 1,000 Watt on phase 3 is injected into the electricity grid. At the same time, the 500 Watts needed by the users on phase 1 and on phase 2 are withdrawn from the grid. The same amount of electricity that the users need is therefore injected on phase 3 (1,000 Watts) and withdrawn on phase 1 (500 Watts) and phase 2 (500 Watts). In this case, the electricity meter is stopped, so there is no additional electricity cost.
Our Smile B3 and Smile 5 are single phase battery systems. You can easily connect them in a house where a three-phase PV inverter is present.
A Watt (W) expresses how much power is needed to run an electrical appliance. For example: a 10 W LED lamp or a 1000 W microwave oven.
1,000 Watt = 1 kilowatt (kW)
With a battery system it is the inverter that determines the power, i.e. how much energy can be put in or taken out of the battery at one moment. A Smile 5 has an inverter with a maximum capacity of 5.000 Watt (5 kW). So at one moment a maximum of 5.000 Watt (5 kW) can be charged or discharged.
A Smile 5 system that supplies 5,000 W can therefore simultaneously light up 500 LED lamps of 10 W:
5,000 W (battery power) / 10 W (LED lamp power) = 500 LED lamps.
A kilowatt hour (kWh) is an indicator of how much energy a particular appliance will use if operated for a full hour. A microwave oven of 1,000 W (1 kW) will use 1 kWh of energy in one hour:
1,000 W x 1 h = 1,000 Wh = 1 kWh
The storage capacity of a battery system is expressed in kWh. The total storage capacity depends on the type and number of battery modules you install. One Smile 5 battery module stores 5,7kWh. A Smile 5 system can be expanded to a maximum of 6 modules or 34,2 kWh.
The power of the inverter is expressed in kW, the storage capacity of the battery in kWh.
UPS stands for Uninterrupted Power Supply. It is an emergency power supply that ensures that the electricity supply will not be interrupted in case of a breakdown of the mains.
The useful storage capacity is also called the nominal capacity of a battery module. It represents how much energy a battery can deliver under specified conditions when fully charged.
A battery must always have some capacity left to be recharged. This is essential to be able to start the chemical reaction during charging. How deep you can discharge depends on the chemistry in the battery and to ensure a good life of the battery, it is best not to go to the limit. A Smile B3 battery module for example can be discharged up to 96%, which is very deep.
LFP stands for Lithium Iron Phosphate. Charging or discharging a battery is essentially an electrochemical process. Lithium iron phosphate indicates the chemical composition of the cathode of a battery cell. AlphaESS only uses LFP cells which are known for their thermal stability, technical quality and outstanding safety. Moreover, these cells are completely free of cobalt.
Not all (home) batteries have the same chemical composition. The chemistry of the battery determines its technical specifications and, consequently, its application. The chemistry of battery cells used in cars, for example, is not the same as that of the battery cells in a home battery.
Different functions are expected from these cells. The batteries of an electric car have to charge, discharge and be light. The battery of a mobile phone has to have a high specific energy (light) and usually does not have to last long. A home battery must above all be safe and have a long life.
Because safety is paramount for AlphaESS, only the extremely safe Lithium Iron Phosphate, also known as LiFePO4 or LFP, was chosen for these home batteries. This chemical composition makes the cells safe and non-flammable even in extreme conditions. This means that you can pierce the battery or cause a short circuit without any problem and it will not catch fire. The AlphaESS home battery is therefore extremely safe.
Lead batteries are cheaper but have some major disadvantages compared to lithium batteries. You can only discharge them halfway, which means that your battery capacity has to be twice as big. In addition, they are three to four times heavier and take up much more space. In recent years lithium-ion technology has undergone a gigantic evolution in terms of capacity and price, as a result of which the LCC (Life Cycle Cost) has become much more favourable than for lead-acid batteries.
AlphaESS only uses Lithium Iron Phosphate cells. These are much safer than the lithium batteries used in cars, for example. The chemical composition of the battery cells makes overheating due to so-called thermal runaway virtually impossible. This makes the cells safe and non-flammable even in extreme conditions. Lithium Iron Phosphate cells also have a very good life span. They are slightly heavier and less compact, but this is usually not a problem in a domestic situation. An additional advantage is that the Lithium Iron Phosphate cells do not contain any cobalt.
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