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FAQs

In order to quickly answer your many questions, Waatts suggests that you find below the answers to the most frequently asked questions, if you cannot find the answer to yours, do not hesitate to contact us to allow us to help you to better understand our autonomy solutions.

  • Is the 15-day deadline really guaranteed?
    The 15-day period begins after the technical visit. Once the order form has been signed and completed and our partner has received the deposit. In the case of financing, the period will begin upon receipt of the bank's agreement. The 15 days are therefore a reality and not a marketing slogan.
  • Can I finance the installation?
    Waatts and its partners offer you almost instant financing. We can advise you on effective partners so as not to waste time. Beobank, BNP Paribas, Belfius, Axa Bank, etc. Ask us and we will send you the contact details of our references. Depending on the amount to be financed, this can be spread over 3 to 10 years; by saving on your electricity bills, you will have repaid the entire investment. Then, for 15 to 20 years, you will soon no longer have any energy charge.
  • How is it possible to have a deadline of 15 days?
    You often hear about extremely long lead times from other providers. Waatts has succeeded, through its position and market volume, in finding an agreement with a partner who has the teams and sources of supply necessary to meet this requirement which it guarantees itself.
  • How much does it cost ?
    Our partners offer you a service allowing you to protect yourself from any energy uncertainty and billing increases, within 15 days. However, the price of our partners is not different despite an express service. To achieve this, there is no secret, you must buy the equipment as soon as it is in stock on the market and also pay our installers for the service requested. The prices charged are those of the market in the conditions of service and quality. In addition to quality and performance, do not forget to include in your calculation the cost of many months of billing at uncertain prices while waiting for the placement of your installation. In this case, the expression “time is money” takes on its full meaning. Protect yourself against price fluctuations and become independent!
  • How many panels should I install?
    Don't worry, our advisors will be there to calculate with you the power needed for your home. They will take into account different factors to calculate efficiency: location, surface, inclination, exposure, etc. An average household in Belgium consumes 3,500 kWh/year. This consumption may vary depending on the number of people in the household and your equipment. A swimming pool, jacuzzi, etc. quickly increase your needs. If you also plan to heat yourself with electricity, you will need to provide additional panels.
  • Can I upgrade my installation?
    By choosing its partner, Waatts wanted to offer you modular and scalable installations. This is why if your consumption increases, if you buy an electric car, if you subsequently wish to install batteries,... your installation will already be prepared for this. This is why it is essential to install the latest generation hybrid inverters.
  • What panels are installed?
    You should know that all photovoltaic panel components are made in China, then the parts are assembled in different countries, in Europe or elsewhere. The brand of the panels therefore has very little importance. What matters is the certification and control of the panels. Power is the key factor. It is not a question of announcing it, but of guaranteeing it. The panels installed by our partners are of the latest generation, full black and controlled to guarantee that the power indicated is that of each panel! The same goes for hybrid inverters. The proof is the 30-year warranty offered on the panels and 10 years on the hybrid inverters.
  • What other services do you offer?
    Photovoltaic panels are currently the hottest product and our arrival on the market is a response to this shortage. Waatts also offers other connected services such as batteries, charging stations, etc. And Waatts, thanks to agreements with other partners, can offer you different ways to optimize your energy autonomy. Insulation of walls, roofs, floors, frames, etc. Do not hesitate to ask us.
  • Contact after-sales service?
    Waatts is not a service provider and does not carry out any installation. Once the order has been placed via our service providers, your questions should be directed to their services. Naturally, Waatts does not abandon you and will always be there to help you within its means.
  • What regions do you serve?
    Waatts partners can operate throughout Belgium and Luxembourg.
  • Who is your partner?
    Our partners come from Belgium. Working in the photovoltaic industry for many years, in 2022 they decided to create a company to provide the local market with fast service and European standards. The company which commits and signs the contracts is indeed Belgian. The installers speak French and it is not uncommon to see the boss in person on your site!
  • Should I buy storage batteries yet?
    The answer currently depends on your region. Indeed, in Wallonia, all the production you have produced is sent back to the network and you can recover it at any time. It is therefore not necessary, in the short term, to invest in batteries for this region. It will always be possible to make this purchase later. Naturally, anticipating is always a solution for peace of mind. In Flanders and Brussels, you do not benefit from this same principle, so it is interesting to consider installing a domestic battery.
  • Kilowatts peaked and Kilowatts hour?
    We speak for the panels of a measurement in peak Kilowatts, which represents the maximum production capacity of these in a context of excellence (southern exposure, full daylight, etc.). This production must be adapted to consumption needs. We consider a loss of 15% between the kW produced and those required. In summary, if you need 5,000 kWh, we will install 6,000 kWp to optimize your installation. If your exposure is EAST or WEST you will have to count on a performance loss of 15%.
  • How big are the panels?
    420 KWp panels measure 1.10m x 1.70 (1.80)m 500 KWp panels measure 1.15m x 2m
  • Am I limited in my production capabilities?
    Many technical factors will determine your production capabilities. The surface area available for the installation of the panels, their orientation, their exposure, shading or not, etc.… It is important to calculate your current and future needs. Are you thinking of replacing part of your heating (gas, oil, etc.) with a heat pump or electric refractory brick convectors? Are you thinking of installing a charging station for your electric vehicle? All of these questions will determine your needs. You should also know that your network manager limits your ability to send electricity back onto its lines. We could roughly summarize this limitation (to be verified with this one) At Ores: Single-phase meter: 5,000 kWh maximum, i.e. 5,750 KWp - Three-phase meter: 10,000 kWh maximum, i.e. 11,500 KWp At Resa the limitations are less restrictive. Ores, asks you to submit a specific request theoretically to produce more than 10,000 kw or 11,500 kwc. But we are talking about the power of the inverter, not that produced by the panels, up to 15 to 20 KWp of panels, there is theoretically no problem to carry out this installation. Our experts will be able to study your options with you.
  • What power for what exposure?
    The power indicated is that of panels installed facing SOUTH and without shading. If your exposure is EAST or WEST you will have to count on a performance loss of 15%. We do not install panels facing NORTH.
  • How many panels to charge my electric car?
    It must be taken into account that photovoltaic panels produce electricity during the day. It is therefore important to know if your vehicle will benefit from these. It will also be necessary to consider the installation of storage batteries, in this case, to be able to benefit from your daily production. Then, depending on the power of your car and the km you will have to travel, we will be able to establish your need for additional photovoltaic panels. To put it simply, to drive 20,000 km per year, an electric car needs, on average, the equivalent of 3,000 kWh of charging over the year and very often a battery to use it at night! Based on this, it is easy to calculate your additional panel requirements.
  • What is needed to establish a quote?
    Our advisor goes on site to listen to your current, but also future, expectations and needs. Next, he will carefully examine the location available for the installation of the panels (surface, installation, exposure). Some photos of your roof, your facade and your electric meter will also be taken. Using this information, in a few moments, he will be able to provide you with a simple and precise quote.
  • Can I install panels on a flat roof?
    There is no problem installing the panels on a flat roof. On the other hand, this type of installation requires a particular structure to orient and optimize the inclination of the panels and their ballast. An additional cost of 5% will generally be requested for this type of installation.
  • A simple and unique price!
    At Waatts, we asked our partners to be clear and transparent! The price is directly linked to the electricity capacity you want to produce! No supplement, no illegible quote, a single price and that's it!
  • German quality?
    Waatts works with a German supplier who has his own specifications and guarantees his equipment for 30 years! Naturally, as with all electronic devices, a large part of the components are manufactured in China. You have never thought that your iPhone comes from a Chinese brand, Apple is indeed American, yet everyone knows that it is made in China. We are in the same commercial and qualitative principle.
  • Are we approved?
    Indeed, our partner is approved and its number is available on the site. This guarantee of quality is essential to ensure a service with complete confidence.
  • Liability insurance!
    Our partner is insured with Vivium for more than 1,500,000 euros… you can rest easy!
  • How many kWp does it take to replace 1 liter of fuel oil or 1 m³ of gas?
    Are you considering replacing part of your fossil energy consumption with solar production? So, know that: To replace 1 liter of fuel oil, you need 10.4 kWh or 12 kWp of solar production! For 1 m³ of gas, you will need 13 kWp. By installing additional panels, you can quickly significantly reduce your gas and electricity bills. If we consider that 10.4 kWh is needed for 1 liter and taking into account that a heat pump produces 4 KWh for 1 KWh consumed. It is therefore necessary for 1000 liters of fuel oil to produce 10,400 KWh, to produce 2600 KWh (3000 KWp) It is therefore necessary for 1000 liters of gas to produce 13,000 KWh, to produce 3250 KWh (3750 KWp) You can calculate your needs here: https://www.energie-environnement.ch/maison/renovation-et-chauffage/423
  • Why do our installations not fear surges or network disconnections?
    Some inverters go into safety mode when the network voltage is too high. In this case, electricity production is stopped. At WAATTS/POWERGREEN our inverters are all equipped with Anti -Islanding protection. It allows the inverter to detect difficulties or failures in the electrical network. It then stops supplying the network while the network regulates itself.
  • If I don't have space on the roof, where can I place my panels?
    At Waatts we have little help you optimize panel locations. If the majority of installations are placed on the main roofs. It is also possible to place panels on annexes, garden sheds, pergolas, etc.… Another possibility is to place them in the garden, for this, you must provide a screed. When the installation requires an external cable passage, it will be necessary to provide a means of passing a 3G6 cable between the installation location and the installation location of the inverter. Another rarer possibility is to place your panels on the walls of your house, this placement requires planning permission depending on their location. our technicians are there to assist you in optimization!
  • What angle for panels on a flat roof?
    An angle of 30 to 35 degrees is required to optimize electricity production. The scope of the shading requires an offset of 30 cm, i.e. instead of placing the panels side by side, they are placed: Across the width every 1.40 m rather than every 1.13 m. On the width every 2 m rather than every 1.72 m.
  • Why install a heat pump with WAATTS?
    It is often believed that installing photovoltaic panels only replaces your electricity consumption bill. However, when you study the energy dependence of your home a little more, you quickly understand that adding a few panels and a heat pump system advantageously replaces part of your fossil heating system. Did you know that it only takes 3000 KWp of additional production to replace 1000 liters of fuel oil or gas. When replacing part of your heating system, you only need to allow 7 years for depreciation. It is also possible and advantageous to think about installing storage radiators, our delegates will be able to help you choose the best combination!
  • What is a dual flow meter?
    A "dual flow meter" is also known as a "bi-directional meter" or "two-way meter". This is a type of electricity meter that separately measures the amount of electricity consumed by a user (offtake) and the amount of electricity injected into the network by the user (injection). This is particularly important for prosumers, who generate their own electricity, often from renewable sources such as solar panels. The dual-flow meter makes it possible to accurately monitor the quantity of electricity produced and consumed, which is essential for establishing fair tariffs, particularly in the context of pricing policies for prosumers. But also for calculating the injection rate. Thus, the Walloon government seems to encourage the installation of these dual-flow meters for solar panel owners in order to facilitate more precise management of electricity production and consumption, as well as to correctly calculate the associated costs.
  • How many panels can I put on my meter in Belgium?
    Depending on your supplier, this may vary, but as a general rule, you can install a maximum of 20 430 kWp panels on a single-phase installation. On a three-phase installation, you can go up to 60 panels. These figures are given for information purposes only.
  • comment calculer la puissance de radiateur pour une pompe a chaleur
    Calculer les M3 de la pièce : Longueur x largeur x hauteur multiplier le total par : 77 pour une cuisine 85 pour votre salon 94 pour la sdb 70 pour la chambre exemple une chambre de 4m x 3 m x 2,5 m = 30 m3 x 70 = 2100w de puissance
  • Installer des panneaux dans son jardin ?
    Il est tout à fait possible d'installer des panneaux solaires dans son jardin en Belgique, et cela peut même être une bonne alternative si votre toit n'est pas adapté à leur installation. Le jardin est souvent bien exposé à la lumière, ce qui permet d'optimiser la production d'énergie. Ces panneaux peuvent être utilisés pour alimenter l'éclairage du jardin ou des systèmes comme l'irrigation. Chez Waatts nous vous proposons différentes solutions facile et rapide. **Avantages** : - Meilleur rendement qu’un toit plat. - Les panneaux au sol se refroidissent plus vite, améliorant la production. - L'installation au sol permet un ajustement plus simple des panneaux (angle, orientation). - L’entretien est réduit (simple nettoyage des débris et tonte de l’herbe sous les panneaux). **Faire attention à ** : - Les panneaux sont plus vulnérables au vol. - Nécessitent des fondations spécifiques (ancrages, pieux, visse). - L'installation est légèrement plus chère qu'une installation sur toit. - Des obstacles comme l’ombre peuvent réduire leur efficacité. - Des câbles plus longs sont nécessaires, ce qui demande une intervention plus complexe pour l'installation. **Législation** : Dans la plupart des cas, il n’est pas nécessaire d’obtenir un permis pour installer des panneaux solaires au sol, à condition que leur surface n'excède pas 80 m² et qu’ils respectent certaines conditions (hauteur, distance des voisins, etc.). **Conseils** : - Le positionnement des panneaux est crucial pour un rendement optimal (orientation Est-Ouest recommandée). - Il faut gérer la végétation autour des panneaux pour éviter les obstacles. - Le câblage doit être soigneusement pensé, avec l’aide d’un professionnel si nécessaire. Il existe plusieurs types de supports pour fixer les panneaux, chacun adapté à des besoins spécifiques (inclinables, bacs en plastique, équerres, etc.).
  • Différence entre des batteries hautes et basse tension ?
    Installer des batteries haute tension (HT) à domicile présente plusieurs avantages par rapport aux batteries basse tension (BT) : Efficacité et Rendement : Les systèmes haute tension fonctionnent généralement avec un rendement plus élevé, car ils nécessitent moins de courant pour stocker et distribuer la même quantité d'énergie. Moins de courant réduit les pertes résistives (pertes de chaleur dans les câbles), améliorant ainsi l'efficacité du système. Moins de Matériel et Installation Simpliquée : Les batteries haute tension peuvent utiliser des câbles plus fins et nécessitent moins d'onduleurs en parallèle, ce qui simplifie l'installation et peut réduire les coûts en matériel. Cela peut être particulièrement intéressant pour les grandes installations ou pour celles nécessitant plusieurs batteries. Meilleure Adaptation pour les Applications avec Panneaux Solaires : Les panneaux solaires modernes produisent souvent une tension plus élevée (au-dessus de 400V). Une batterie haute tension permet un couplage plus direct avec ces systèmes, réduisant la nécessité de conversions de tension multiples, ce qui améliore la gestion de l'énergie. Puissance de Sortie Supérieure : Les batteries haute tension sont capables de fournir des niveaux de puissance plus élevés en continu, ce qui les rend idéales pour des appareils gourmands en énergie, comme les climatiseurs, les pompes à chaleur, ou les appareils de cuisine. Moins de Chaleur Générée : Avec un courant réduit, les batteries haute tension produisent moins de chaleur lors de la charge et de la décharge, ce qui contribue à la durabilité de l’installation et améliore la sécurité. Les batteries basse tension, elles, peuvent cependant être plus abordables et simples à utiliser pour les installations plus modestes. Elles peuvent également être préférées dans des cas spécifiques de compatibilité d’appareils ou de gestion d’énergie plus flexible pour de petites maisons. La différence de puissance de sortie entre une batterie haute tension (HT) et une batterie basse tension (BT) dépend principalement de leur conception, mais voici une estimation générale des puissances de sortie typiques pour chaque type : 1. **Batteries Haute Tension (HT)** : Les batteries HT fonctionnent souvent avec des tensions de 200V à 600V et peuvent généralement fournir une puissance de sortie continue plus élevée, généralement autour de **5 kW à 10 kW**, voire plus, selon le modèle. Ce niveau de puissance permet d’alimenter plusieurs gros appareils simultanément ou de couvrir la majorité des besoins énergétiques d'une maison. 2. **Batteries Basse Tension (BT)** : Les batteries BT, quant à elles, fonctionnent souvent entre 12V et 48V et offrent une puissance de sortie plus modeste. Leur capacité de puissance continue se situe en général autour de **1 kW à 3 kW**. Cela peut suffire pour des besoins de secours ou pour des appareils nécessitant moins d’énergie, mais elles sont moins adaptées pour des applications à forte demande comme les systèmes de chauffage électrique. **Résumé des différences approximatives** : - **HT (200V - 600V)** : Puissance continue entre 5 kW et 10 kW (adaptée pour usage résidentiel intensif). - **BT (12V - 48V)** : Puissance continue entre 1 kW et 3 kW (adaptée pour usages plus modestes ou en appoint). En plus de la puissance de sortie, les batteries haute tension sont souvent plus efficaces pour les systèmes solaires résidentiels de grande taille, où des tensions plus élevées permettent un rendement accru et une perte de chaleur réduite.
  • Capacité de charge/décharge des batteries ?
    En résumé : Chaque batterie de 5 kW peut gérer une charge/décharge maximale de 100% de sa capacité, soit 5 kW. Il faut relativiser car pour des raisons de sécurité les batteries sont limités à une décharge minimum de 20%. Si vous ajoutez une deuxième batterie de même capacité, la capacité théorique totale devient 10 kW, répartie sur les deux batteries. Rôle de l'onduleur : L'onduleur (ici 5 kW) agit comme le "cerveau" du système, contrôlant la charge et la décharge des batteries. Si votre système supporte la gestion parallèle des batteries (ce qui est le cas chez WATTIX), l'onduleur répartira la charge et la décharge entre les deux batteries. Charge et décharge à 200% Avec deux batteries, la capacité totale étant doublée, le système peut gérer jusqu'à 200% de la capacité individuelle d'une batterie (5 kW), soit 10 kW en charge/décharge combinée. Cela ne signifie pas que chaque batterie sera poussée au-delà de 100% de sa capacité. Plutôt, la charge/décharge totale du système augmente proportionnellement au nombre de batteries. Conditions : Les batteries doivent être configurées pour fonctionner en parallèle, ce qui est possible avec nos produits. Le câblage, les paramètres de l'onduleur et la communication entre les batteries doivent être correctement réglés. Exemple : Avec 1 batterie : Capacité totale = 5 kW, charge/décharge max = 100% (5 kW). Avec 2 batteries : Capacité totale = 10 kW, charge/décharge max = 200% (10 kW). Conclusions : En ajoutant une deuxième batterie, le système augmente sa capacité totale et peut gérer une charge/décharge plus importante. On peut estimer aussi qu'en doublant les batteries, l'autoconsommation, peut dépasser les 50%. 4X plus de batterie que la puissance de l'onduleur donne en moyenne 80% d'autoconsommation. Si chaque batterie peut gérer une charge/décharge maximale de 100% (5 kW), alors avec 4 batteries, la charge/décharge totale est 400% (20 kW). Avec 4 batteries, la capacité de stockage passe à 20 kWh, et le système pourra gérer une charge/décharge totale de 400%. Cependant, l'onduleur Deye de 5 kW limite la puissance de sortie instantanée à 5 kW. Si vous voulez tirer pleinement parti des 20 kW de puissance des batteries, vous devrez envisager un onduleur plus puissant ou plusieurs onduleurs en parallèle.
  • Qu'est-ce qu'un EMS ?
    Un EMS (Energy Management System) pour panneaux solaires est un système de gestion de l'énergie qui optimise : - la production - la consommation - le stockage de l'électricité dans une installation photovoltaïque. Rôle d’un EMS dans un système solaire : Optimisation de l'autoconsommation : Gère la consommation en fonction de la production solaire pour maximiser l'utilisation locale de l'électricité. Active ou désactive des appareils en fonction de la disponibilité d’énergie (ex. chauffage, pompe à chaleur, chargeur de voiture). Gestion du stockage d’énergie (batteries) : Contrôle le chargement et le déchargement des batteries pour éviter de consommer de l’électricité du réseau quand ce n’est pas nécessaire. Privilégie l'utilisation de la batterie aux heures de pointe pour réduire la facture d’électricité. Interaction avec le réseau électrique : Peut revendre l’électricité excédentaire au réseau si cela est rentable. Peut couper l'alimentation du réseau en cas de surcharge ou de coupure (mode îlotage). Pilotage intelligent et suivi en temps réel : Connecté à une application mobile ou une interface web permettant de suivre en direct la production solaire, la consommation, et le niveau de charge des batteries. Peut utiliser l'intelligence artificielle ou des algorithmes prédictifs pour ajuster la consommation en fonction des prévisions météo.
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