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Autoconsommation / Photovoltaïque / Autonomie / stockage d'énergie / chauffe-eau solaire / Aide à l'installation

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Pros ou particulires, nos collaborateurs sont à votre disposition pour vous aider à choisir et installer le système photovoltaïque Wanit

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Wanit prépare le kit avec tous les éléments nécessaires au montage: panneaux, structure, vannes 3voies, chauffe-eau, cablages,...

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Le système Wanit est conçu pour réduire au maximum toutes les difficultés de montage.  

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FAQ / Support: Services
  • What countries do you ship to ?
    Currently we only ship to Central Europe. Please note that shipping costs may vary from country to country and depending on the chosen carrier. For any shipment outside Belgium, we invite you to contact us.
  • What are the shipping times ?
    We do our best to ship your orders as quickly as possible! When placing your order, we will keep you informed of the probable delay, depending on available stocks and assembly times. Sometimes, for reasons beyond our control (shortages, or large order volume), lead times may be slightly longer than expected. Our apologies should this be the case.
  • Comment encoder le système Wanit dans la PEB?
    Le système Wanit est composé d'un côté d'une installation photovoltaïque qui s'encode dans l'onglet production photovoltaïque et de l'autre d'un boiler électrique dédié à l'eau chaude sanitaire, en combinaison ou non avec un autre système de production d'eau chaude sanitaire. Que le système Wanit soit dédié à l'eau chaude uniquement, équipé de batteries ou non ou soit également relié à des circuits électriques de la maison, l'encodage est toujours le même: On encode la puissance crête des panneaux, leur orientation et ombrage et on coche"onduleur à isolation galvanique" (gain de 1%) même si le système Wanit n'est pas à proprement parlé un onduleur. Pour le boiler électrique TWIN, il convient d'encoder le profil de soutirage (M) et les informations qui figurent sur l'étiquette énergétique du boiler suivant sa contenance avec le ηwh à 40% pour les 65L et 80L. (cfr onglet documentation du site) Lorsque le système Wanit est raccordé à une chaudière gaz ou mazout avec by-pass, il faut encoder le système Wanit comme générateur préférentiel; le non préférentiel étant le système de chauffage d'appoint. Nous pouvons fournir aux certificateurs, responsables PEB et Conseiller PEB, les preuves sur l'accord de l'assimilation comme "onduleur à isolation galvanique" du SolarConnector.
  • Does the data collected by the application allow me to know my water consumption ?
    There is no water flow meter on the Wanit water heater. If you are interested in this information, you must install a water meter either on the cold water supply or on the hot water pipe after the water heater.
  • What data is collected by application ?
    All data on energy production from photovoltaic panels, tank heating (TWIN and satellites), battery charging and discharging and tank temperatures can be viewed and stored by hour (for a week), by day ( for one month), per week (for one month), per month (for one year) and per year. Water temperature data is not stored for more than one month. The system also keeps the history of changes to parameters by the user, occurrences or erasures of error codes, as well as the activation of heat treatment.
  • How can I install the EasyWanit application on my mobile phone?
    EasyWanit is an application that can be downloaded from the AppStore (Apple) or PlayStore (Android). It takes up little memory space on your mobile.
  • Who has access to the data collected by the mobile EasyWanit application?
    There is no connection between the Wanit company, third-party companies and the installed Wanit products (no internet connection). The exchange is done by Bluetooth and the application does not send any data automatically. Data is exchanged only between your smartphone and the SolarConnector. When the application is closed, the uploaded data is erased. It is only in the event of an intervention under warranty that the content of the history of the data recorded in the SolarConnector is communicated to Wanit for the purpose of evaluating the problem by the support service and with your agreement. The data is transmitted to us via email as an unencrypted attachment. All data collected is processed in accordance with our privacy policy.
  • How far can I interact with the SolarConnector ?
    The Bluetooth interface has a limited range, about ten meters, but it all depends on the presence of obstacles such as walls between the SolarConnector and the smartphone.
  • I have lost my PIN code. How can I log in again?
    The default PIN code is 0000. It is always recommended to change it to avoid any risk of hacking. To do so, in the "parameters" tab, a prompt allows you to modify it. If the modified PIN code has been misplaced, it is always possible to restore the default code 0000 encoding the PUK code. The PUK code is only communicated on request to the WANIT after-sales service.
  • What size water heater should I get for my household ?
    It all depends on the space available to install the Wanit water tank and the number of people in your household. If you have little space, the 45L model already guarantees hot water for 2 showers of more than 5 minutes. The 80L model guarantees 4 showers of more than 5 minutes. It is therefore more suitable for families with children. Thanks to its design in two tanks, once completely emptied, there will be new hot water after about 3 hours. For households that frequently take baths, we recommend the Wanit preheater in addition to another water heating system (preferably instantaneous), or placing two Wanit water heaters in series in order to have more large stock of hot water guaranteed.
  • How many and what type of PV panels should I install ?
    All types of photovoltaic panels are compatible. Nevertheless, you have to respect some rules: Below an output voltage of 48V, heating will not be possible. To be able to connect a battery, the open circuit voltage (Voc) must exceed 60V. The majority of standard panels on the market offer an output voltage of around 40V. It is therefore necessary to install at least 2 of them in series. The maximum admissible power connected to the SolarConnector is +/-2400Wp (max 20A, max 200V). The system peaks at 1300W when heating and 1500W when charging. This affects installations that total a peak power greater than these thresholds, but this instantaneous power is only effective for a few hours per year (mid-summer day in a very clear sky with little humidity). For power installations above the thresholds, the rest of the year, the production is higher and therefore the coverage of your needs is greater.
  • Is it possible to connect only one photovoltaic panel ?
    Yes, it is possible as long as the open circuit voltage exceeds the minimum thresholds. A photovoltaic panel can already significantly reduce your bills!
  • What is the battery  used for? Is this useful ?
    Depending on the water heater model and the battery capacity, the battery will have the capacity to heat at least the first tank, or even the 2. It can therefore store much more energy than the water heater alone. The battery has almost no energy loss, while the water heater, although highly insulated, has thermal losses. It will avoid energy storage by "overheat" (temperature above 60°C). The battery also makes it possible to heat the water heater outside of sunny periods, at night for example, using free energy and makes it possible to postpone heating to a time when needs are greatest, for example. It therefore offers much more flexibility.
  • What length and section of electrical cables is acceptable between the PV panels and the SolarConnector ?
    It is essential to refer to the general regulations on electrical installations which are in force in the region of the installation. Although higher losses may be allowed, at Wanit, we recommend not to exceed 1% of losses due to cable heating at full solar power (4 efficient PV panels). With sections of copper cables of 4mm², it should not exceed 20 meters in length; with sections of copper cables of 6mm², it should not exceed 30 meters in length if the panels are well mounted in series (+/- 150V) but many regulations authorize lengths that can exceed 60ml (less than 2.5 % loss). We invite you to refer to the charts in the installation manual.
  • What length and section of electrical cables is acceptable between the SolarConnector and the TWIN water heater ?
    As the voltage of the electric current between the SolarConnector and the TWIN water heater is lower (+/-48V), the admissible lengths are shorter and the cable sections larger than for the connection with the PV panels. It is therefore prudent to place the SolarConnector close to the water heater. Cable lengths should not be exceeded in 25mm², by more than 15ml, in 35mm² by more than 20ml to remain under 1% loss at maximum power. We invite you to refer to the charts in the installation manual.
  • Can I install the battery away from the SolarConnector ?
    With lead/carbon batteries, the algorithm that sets the charging voltage takes into account the temperature of the room in which the batteries are placed. It is therefore important to install the SolarConnector nearby, in a ventilated space at a constant temperature (neither too hot nor too cold - free from frost). By reducing the lengths of cabling, the sections can be reduced and losses in the cables will be negligible. This is also valid for Lithium batteries, although they are less sensitive to temperature. We invite you to refer to the charts in the installation manual.
  • I already have photovoltaic panels, can I install the water heater or the hot water preheater Wanit ?"
    Yes, but some rules must be taken into consideration. The SolarConnector PV input limits are: max 200V (Voc) - max 20A (Isc). For example: A series of 4 panels 400Wp (1600Wp) gives 4x +/- 48Voc = 192V for 8.5A. Another example: 6 panels of 400Wp (2400Wp) connected in 2 series of 3 panels give 3x48V: 144V for 17A. The open circuit voltage must however exceed 60Voc. Some configurations such as panels mounted in parallel are therefore not possible. For strings of more than 200V(Voc), it is necessary to dedicate, by separately wiring a few panels (ideally for a power of +/- 1600Wp) and connect them to the SolarConnector. Soon, thanks to the Diverter, it will be possible to connect strings of higher voltage photovoltaic panels. The Diverter is placed before the connection of a string to your inverter and transfers the solar power to the Wanit system, when the latter is in demand for heating or charging and provided that the solar power is compatible. The rest of the time it does not influence the prosumer installation. In the event of saturation of the Wanit system (in the event of absence in the summer), the production of electricity generally diverted to the Wanit system can always be resold and injected into the network. The Wanit system is not compatible with installations under micro-inverters.
  • I don't have photovoltaic panels, can I still use the Wanit water heater and install PV panels later ?"
    Yes, the Wanit water heater model works like a traditional water heater plugged into a 230V socket. You must activate the 24/24 or ECO function and define your parameters via the mobile application. Later, you can connect the SolarConnector and the PV panels. Note that the mobile app will not be available to modify parameters or monitor the consumption
  • Can you take care of installing the photovoltaic panels at my place ?
    Yes, but only in certain areas already served by our approved installers. These installers are subject to validation of competence and continuous quality control in order to always ensure the complete satisfaction of our customers.
  • Can I install the SolarConnector and the TWIN water heater myself ?
    Yes, the installation does not present any particular difficulty, as long as you have the minimum equipment and a skill for plumbing or electrical work. The installation manual can be downloaded from our site.
  • How long, on average, does an installation take?"
    Installation is usually done in two steps. The installation of photovoltaic panels takes about 2 hours for 2 people. Installing the water heater also takes less than two hours. But it all depends on the particular difficulties (accessibility, need for a lift, other work to be planned).
  • Is it better to place the panels more vertically or more horizontally ? What if they are placed on a facade ?
    In order to guarantee the greatest production in mid-season and in winter, it is better to orient the panels towards the south, between the south-west and the south-east, with an angle between 45° and the vertical, rather only between 45° and the horizontal. A full West or full East orientation will be less efficient. An installation on a South-East facade will benefit more from morning light, while a South-West installation will benefit more from afternoon light. Laying the photovoltaic panels lying down is less optimal because it is only very efficient in summer.
  • Can PV panels be wired “parallel” instead of “series”?
    In general, the panels will be connected according to a series diagram to ensure the highest network voltage and thus reduce the cable sections (reduction of energy losses in the cables). The system imposes a minimum open circuit voltage of 60V. If you are installing 4 or more panels, it may be necessary to carry out a mixed assembly: parallel and series: Indeed, the open circuit voltage cannot exceed 200V (Voc) and 20A (Isc). It is therefore possible to connect 6 panels of 400Wp (2400Wp) for 48Voc depending on the assembly 2 series of 3 panels in parallel. It should be noted in this case a slight summer clipping in the middle of a very sunny day and clear sky because the heating or charging power is capped (1500W for charging).
  • Is it possible to convert the Wanit hot water tank into a complete  water heater? Is the reverse possible also ?
    If the 24/24 or ECO functions are not activated, all hybrid water heaters are hot water preheaters. On the other hand, for a hot water preheater to become a full boiler, it would be necessary to add heating resistors connected to the 230V alternating current and all the command and control electronics for the heater, which is not present on this type of model. It is therefore not possible.
  • Is the earth cable mandatory  for the panels, also for the water heater and the SolarConnector ?"
    Yes, it is essential to connect all the elements that make up the system to the ground: the PV panels, the SolarConnector and the water heater. The latter, if it is connected to the SolarConnector, must be earthed in all circumstances, even if the 230V plug is disconnected! The earth connection must be permanent and guaranteed.
  • Can the TWIN DC hot water preheater be installed on the hot water  circuit between my boiler and my shower?
    Yes, the hot water preheater TWIN DC can be installed upstream or downstream of the auxiliary heating system. When installed upstream, the motorized 3-way valve will be connected so as to switch to the hot water circuit when the Wanit TWIN is cold. It can even ensure hot water priming from the auxiliary to ensure that during drawing, there is no noticeable drop in temperature. If Overheat is authorized, a thermostatic 3-way valve must also be added to ensure hot water below 60°C to avoid any risk of scalding.
  • If I have a hot water loop, with a Wanit water heater or calorifier, can I completely turn off the loop ?"
    Yes, by installing the Wanit water heater or the Wanit preheater near your shower, there will be no waiting time for hot water. The motorized 3-ways valve will possibly make sure to initiate the arrival of the auxiliary hot water if it notices that there is a risk of reaching the end of the hot water stock. When the quantity of water in the pipes between the auxiliary producer and the water heater is very large, connecting a solar preheater to the hot water is advantageous because it will fill with the cooled water in the pipes due to the shutdown of the hot water loop. But for this type of assembly, it is better to use a smaller capacity Wanit satellite boiler.
  • Can the hot water preheater TWIN DC be installed before the domestic cold water connection of my boiler ?
    Yes, the hot water preheater TWIN DC can be installed upstream or downstream of the auxiliary heating system. When installed downstream, the auxiliary heating system will only be in operation when there is a shortage of sunshine and the Wanit preheater has exhausted the energy storage (hot water and battery). It is always preferable that the auxiliary water heating system be an instantaneous system because there is no stationary loss of energy. On the other hand, some water heaters do not accept to be supplied with water that is already warm or hot. It is therefore important to check the instructions for the auxiliary water heater. The latter may be a Wanit water heater. In this case, it may be useful to divide the photovoltaic field into two installations, which can go up to 4000Wp (2x2000Wp).
  • Is the 9V rechargeable battery essential in the SolarConnector ?
    If the SolarConnector is connected to a solar preheater (TWIN DC), or a water heater not connected to 230V, and no battery is installed, at certain times, such as at night, the electricity production is insufficient to make operate the Bluetooth control or communication elements. The battery keeps the different modules of the Wanit system active at all times. In addition, the motorized 3-way valve must be powered to operate. In the absence of current, it will remain in the position in which it was when solar production was interrupted. There is no particular consequence if the valve is connected to cold water. On the other hand, if the valve is connected to the hot water, the priming of the auxiliary hot water or the switch to the auxiliary hot water cannot be done at night without the rechargeable 9V battery.
  • What is the motorized 3-way valve  used for? Can I do without it ?
    1° When water is heated above 25°C but at a temperature below 50°C, there is always a risk of the development of a toxic bacterium called Legionella. The water heater in permanent heating mode will ensure that the water stored in its tanks is heated to 60°C so that these bacteria are eliminated by heat treatment. But in solar calorifier mode, it is possible that this temperature is not reached regularly, in winter for example. In this case, it is recommended not to draw lukewarm water which would have stagnated for several days without treatment at more than 60°C. The motorized 3-way valve will therefore ensure that the water distributed in the circuit is not untreated water, as long as the treatment is not finished. A LED light indicates the processing status. 2° to increase energy storage, the system can allow water storage up to 85°C. It is not recommended to dispense water at this temperature due to the risk of scalding. The motorized 3-way valve, when mounted on the cold water circuit, will therefore mix cold water with very hot water to ensure a distribution water temperature of less than 60°C. If the 3-way valve is connected to the auxiliary hot water circuit, it will be necessary, if Overheat is authorized, to install a thermostatic 3-way valve connected to the cold water circuit to ensure mixing without the risk of scalding. 3° when the 3-way valve is connected to the auxiliary hot water circuit, it ensures continuity of hot water distribution when the solar preheater has become cold after significant draw-off. By selecting the priming function via the mobile application, the motorized 3-way valve will anticipate the end of the hot water supply by allowing a little water to pass from the auxiliary circuit so as to ensure that there will be no no temporary temperature drop in hot water distribution. Nobody likes their shower to get cold even for a few seconds!
  • What is the additional temperature sensor on the water heater or hot water preheater  used for?
    A probe to stick against a pipe is proposed to increase the precision of the operation of the motorized 3-way valve. It is not essential for mounting the valve on cold water. In this configuration, it is placed between the hot water outlet of the Wanit tank and the 3-way valve. It guarantees that all the hot water present in the tank is delivered by activating the closing of the valve with more precision because the temperature sensors present in the tanks do not detect the water temperature at the top of the tank but in lower part. For mounting the motorized 3-way valve on an auxiliary hot water circuit, the sensor is required and is placed on the auxiliary hot water circuit close to the 3-way valve (but not against it so as not to be influenced by the temperature from the Wanit reservoir). The sensor detects that the hot water is primed and controls the 3-way valve so that all the hot water comes from the Wanit system as a priority before authorizing water withdrawal from the auxiliary circuit. Without this probe, the system cannot perform priming.
  • What is the additional temperature sensor on the SolarConnector used for?
    Some types of batteries (Gel, lead/carbon, ..) are sensitive to ambient temperature. The service voltages (float charge or discharge) will not be the same whether the batteries are cold or hot. In the SolarConnector there is a temperature sensor that detects what the ambient temperature is at sunrise. On this basis, the service voltages will be fixed. In the presence of an external sensor, installed close to the batteries, the system adapts even more precisely and continuously to the variation in room temperature by varying the voltage accordingly according to the technical characteristics of the batteries chosen. For Lithium batteries, this probe is not required because Lithium batteries have a BMS with temperature sensor.
  • What is the Diverter Wanit used for?
    It is not possible to connect photovoltaic strings that exceed 215V (Voc) and 175V (Vmpp). For the moment, Wanit proposes to modify the wiring of the string to connect to the Wanit system only an assembly below the thresholds of 200V(Voc) and 20A (Isc). Thanks to Wanit's Diverter, it will be possible to divert the current of a string of panels that exceeds 200Voc without modifying the wiring. The Diverter is placed just before your inverter. The diverter is a kind of switch, coupled with a "step down" of tension. The current voltage at the output of the Diverter on the Wanit side will therefore always be below 200V. When there is a heating or load demand, the current is diverted to the Wanit system. In case of saturation or excessive solar power, the Diverter lets the current pass without modifying it to the inverter. There is therefore no longer any loss in the event of prolonged absence. The Wanit system and the Diverter are not compatible with micro-inverters
  • Should I add a thermostatic valve after the motorized 3-ways valve ?
    It depends: if the motorized 3-way valve is connected to the cold water circuit, it should not be. The motorized 3-way valve will produce the mixture which guarantees a water temperature below 60°C. On the other hand, if the motorized 3-way valve is connected to the auxiliary hot water circuit, if the Overheat function is activated, the water can be distributed at a temperature that exceeds 60°C (up to 85°C). To avoid any risk of scalding, a thermostatic 3-way valve must be added.
  • Is security group essential ? Are there any other solutions?
    When water heats up, it expands. The excess volume, if not absorbed, will increase the pressure of the water circuit, until generating water leaks or bursting of pipes, with the multiple damage that water can generate. The safety group evacuates the excess volume of (cold) water to the sewer. An expansion vessel is also possible but must be selected with care due to the risk of bacterial development in the expansion vessel if placed in a dead leg of the installation.
  • What type of batteries can I plug into the Wanit system?
    Only batteries approved and/or sold by Wanit, included in the list (regularly updated cfr mobile application) are authorized. Wanit does not guarantee the longevity or their compatibility with the Wanit system of other battery models.
  • Can I connect other electrical equipment to the Wanit battery?
    Of course, but Wanit cannot be held responsible if battery life is reduced due to demands from other connected equipment. Wanit has developed an intelligent algorithm that guarantees very low battery wear and a longevity of more than 10 years. The SolarConnector detects the discharges carried out on the batteries by other equipment and monitors them. The battery longevity guarantee is automatically suspended if equipment external to Wanit affects the wear of the batteries.
  • I don't have a battery, what is the ONE button for on a Wanit preheater (TWIN DC)?"
    On hot water preheater (TWIN DC), this button has no function if no battery is connected to the SolarConnector.
  • I don't have a battery, what is the ONE button on the Wanit Hybrid water heater for?
    Exclusively on the Hybrid models, in the absence of a battery, the ONE button allows you to manually activate a single heating of the first or the 2 tanks (see parameters in the EasyWanit mobile application) by using electricity from the network in addition to the instant solar production from photovoltaic panels, during the day.
  • How can I know the possible faults of the system ?
    Thanks to the Mobile application, it is possible to find out about all the faults detected concerning the various elements of the system: master water heater, satellite boiler, Diverter, motorized 3-way valve, probes, SolarConnector, etc. however, the installation must be supplied with current, either through the 9V Accu, the mains in the case of water heaters, or a battery. Some indicator lights on the SolarConnector or on the water heater indicate the presence of a fault and allow you to know its general nature. To understand what the indicator lights indicate, refer to the user manual for each product.
  • How do I know if my battery is worn out or has a fault ?
    48V (51,2V) batteries approved by Wanit are designed to provide a number of cycles well above what is normally possible in 10 years. They are selected from battery manufacturers who offer the most guarantees. Nevertheless, it cannot be excluded that some are affected by a manufacturing defect or damage during transport. In this case, it is possible to test the capacity of the battery by charging the battery completely and requesting a complete heating. If the battery is not able to heat one of the two tanks of the main water heater, it must be replaced. If the battery heats up abnormally, or swells, it must also be immediately disconnected and replaced.
  • What is Wanit?
    Wanit is a company that aims to democratize and generalize the use of renewable energies in order to move towards carbon neutrality as quickly as possible, while abandoning the use of fossil fuels. Through products that are easy to install, Plug&play, economical, which store and consume the energy produced on site while limiting all losses, renewable energies will be less expensive than fossil fuels. The hot water preheater and the photovoltaic hybrid water heater (Wanit TWIN), with or without battery, offers a very short return on investment; it avoids many other investments and adapts particularly well to the renovation of existing buildings.
  • What type of customer is your solution designed for?
    Wanit products are designed for all types of hot water use, primarily in homes, but it is also suitable for hairdressers, Horeca,... It is particularly well suited for small dwellings. It is also very effective in improving the profitability of the largest photovoltaic parks which have low self-consumption and a low resale price of electricity. It replaces, or is added to, hot water heating installations to significantly reduce bills (up to 85%) and ensure the reduction of greenhouse gas emissions.
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