Electronic boards that talk directly to your inverter, meter, battery and van — and drop everything into Home Assistant. No cloud, no subscription, no outage when a manufacturer decides to close a door.
Already have a quote — from someone else? Get it checked before you sign →
A remote server goes down, costs money, and can shut overnight — and the day it closes, your data and your control go with it. Our boards do without it: they talk directly to your hardware, on your network, at home. Here's what that changes concretely.
Your box is down, the fibre is cut, your provider has an outage? It doesn't matter: measurement, display and control run on your local network. Nothing depends on a server on the other side of the world.
You pay for the board once, full stop. No account to create, no "premium" to unlock your own figures, no service that vanishes in two years taking your history with it.
Consumption, production, battery level: everything stays within your walls. Nothing is sent, resold or analysed elsewhere — Home Assistant, on your machine, stores it.
We tested it for real: the cloud of a market inverter can cut local access with a simple update. With a direct wired link (Modbus, teleinfo), no one can unplug you.
All designed, routed and soldered by hand. They share the same DNA — the same electronic base, standard protocols, all local — but each one solves a specific problem, at home and on the road.
Your Deye inverter and battery in Home Assistant, fully local — no more Solarman cloud. No Raspberry Pi to build or configure: it's a finished product, you plug it in and it works. It reads the inverter and the BMS directly and publishes every measurement at your place.
Your home's brain, delivered already set up. A silent mini-computer and a wall tablet: plug it into your router and your dashboard is already there. Everything runs at home — no account, no subscription.
Options, sur-mesure et livraison : demander un devis →
Diverts your solar surplus to the water heater by modulating the power, watt by watt — instead of exporting your production for nothing. Multi-point (several clamps, over Ethernet), works with the French Linky meter (off-peak/peak), and 100% local where the big routers on the market go through their cloud app.
Your solar power system installed and configured, turnkey: Deye hybrid inverter, 520 W bifacial panels and high-quality batteries. The real plus: you monitor your production live on a tablet or smartphone — 100% local, no subscription, your data stays with you. Free assessment and quote. (On-site service in France.)
A large 16 kWh LiFePO4 battery (51.2 V · 314 Ah) to store your solar energy — and monitor it live in Home Assistant, locally, with no cloud.
Your gas and water consumption in Home Assistant, right next to your solar data. The module clips onto the meter, runs on a battery and talks straight to the SolarGateway — no WiFi to configure, no account, no app. Your readings stay with you.
Your air conditioning in Home Assistant, locally — no manufacturer cloud, no subscription, and without touching its original controller. We connect to the communication port the manufacturer provides: the unit keeps managing its own safety functions, we only send it setpoints.
Votre spa gonflable Intex ou Bestway piloté depuis votre domotique : température, chauffage, filtration et bulles, en 100 % local — sans cloud, sans abonnement, et sans aucune modification du spa (garantie préservée). En développement : réservations ouvertes.
The brain of your camper van: a large 7″ touchscreen that brings all of life on board together on a single interface — solar energy, batteries, water levels, temperature, air quality, GPS — and controls your lighting, pumps and equipment. All local, wireless, no internet or subscription, even deep in the woods. From essential monitoring to complete, custom automation of your van.
Options, sur-mesure et livraison : demander un devis →
Autonomous grey-water management for a van's dry toilet: the liquid is evaporated, no more tank to empty. Gentle, quiet and energy-efficient treatment.
A leisure battery built here, in a sealed IP67 case, with a BMS whose every cell can be read in Home Assistant — locally, with no account and no proprietary app. Autonomy measured in the field: five days without recharging, fridge included.
Options, sur-mesure et livraison : demander un devis →
Each board publishes its measurements as standard Home Assistant entities, via local MQTT or the ESPHome API. You drop them into your dashboards, you build your automations — "heat the water when I'm producing", "alert me if the battery drops" — and everything is decided at home, even offline.
The boards are the core — but we can also prepare the complete setup for you: the configured Home Assistant box, the screen, and the integration of your existing equipment. You plug it in, it works, and everything stays at your place.
We install and configure your turnkey solar power system: 12 × 500 W panels (6 kWp), Deye SUN-6K hybrid inverter, DC and AC boxes, wiring and grid connection. Without battery €7,490 · with 12 kWh €9,990 · with 16 kWh €10,790. Your panels produce, your battery stores, and you monitor everything live on a tablet — 100% local, no subscription.
See it running
Full demo — a whole day in 30 s →
A pre-configured mini-PC — like ours — delivered with a wall tablet for control. Nothing to install: plug it into your router, and your dashboard is already there.
We connect what you already have to Home Assistant, locally: heat pump, pellet stove, water heater, lighting, shutters, ventilation… One single dashboard for the whole home, without juggling apps.
Not the same thing as the free study above: that one sizes a NEW project with us. This is for a quote you already received elsewhere, that you want checked before signing.
Not a refurbished box. Every board is drawn, routed, etched then assembled here — schematic, PCB, firmware. Mastering the chain from copper to sensor means being able to repair it, open it, explain it, and adapt it to your setup rather than the other way around.
Why do so few solutions do this? Because integrating everything locally — the inverter, the battery, the surplus, the sensors, the screen — is laborious, and the easy shortcut is still the cloud. I spent months taming it all, piece by piece. The result: you just plug it in.
Open firmware, standard protocols (Modbus, MQTT, teleinfo): nothing locked. Everything integrates with an existing Home Assistant setup, and nothing forces you through an online service to read your own data.
TRES BON PRODUIT ! Simple a installe,
— Stephane Rosso · SolarGateway
Write to us — reply within 48 h. Boards are made to order: tell us your need and your existing setup.
heliolocal — entrepreneur individuel (EI).
SIRET : 484 271 499 00036
Siège : 45 rue Charles de Gaulle, Appt 2, 02500 Hirson
Contact : contact@heliolocal.fr
Directeur de la publication : Stéphane Rosso
TVA non applicable, art. 293 B du CGI (franchise en base).
OVH SAS, 2 rue Kellermann, 59100 Roubaix, France — ovhcloud.com.
L'ensemble du contenu de ce site (textes, visuels, schémas) appartient à l'éditeur, sauf mention contraire.
En vigueur — juillet 2026
Les présentes conditions régissent la vente de cartes électroniques et prestations associées par heliolocal (entreprise individuelle Stéphane Rosso, SIRET 484 271 499 00036, 45 rue Charles de Gaulle, 02500 Hirson — contact@heliolocal.fr) via le site heliolocal.fr, à ses clients particuliers et professionnels.
Les produits sont des cartes électroniques fabriquées de façon artisanale, à la commande. Ils sont décrits avec soin ; photos et illustrations n'ont pas de valeur contractuelle.
Prix indiqués en euros, toutes taxes comprises. TVA non applicable, art. 293 B du CGI (franchise en base). Frais de livraison offerts en France métropolitaine, sauf mention contraire. Les produits sont facturés au tarif en vigueur au moment de la commande.
La commande s'effectue en ligne. Le paiement se fait par carte bancaire via Stripe (prestataire sécurisé) ; heliolocal n'a jamais accès à vos données bancaires. La commande devient ferme à la confirmation du paiement.
Les produits étant fabriqués à la commande, le délai de préparation est communiqué à la commande ou sur demande. Livraison à l'adresse indiquée ; le transfert des risques a lieu à la remise du colis.
Le client particulier dispose de 14 jours à compter de la réception pour se rétracter sans motif (art. L221-18 et s. du Code de la consommation). Le produit doit être retourné complet et en bon état, frais de retour à sa charge ; remboursement sous 14 jours après réception du retour. Pour l'exercer : contact@heliolocal.fr.
Tous les produits bénéficient de la garantie légale de conformité (art. L217-3 et s. du Code de la consommation) et de la garantie des vices cachés (art. 1641 et s. du Code civil).
Les produits raccordés au réseau 230 V doivent être installés par une personne qualifiée, selon les règles de l'art et la notice fournie. heliolocal ne saurait être tenu responsable d'une installation ou d'un usage non conformes.
Les données sont traitées conformément à notre politique de confidentialité.
Droit français. En cas de litige, le client adresse d'abord une réclamation écrite à heliolocal. À défaut de solution amiable, il peut recourir gratuitement au médiateur de la consommation dont relève heliolocal (art. L612-1) : CM2C — Centre de la Médiation de la Consommation de Conciliateurs de Justice, 14 rue Saint-Jean, 75017 Paris — cm2c.net (n° d'adhérent cm2c-8193). Plateforme européenne de règlement en ligne des litiges : ec.europa.eu/consumers/odr.
Dernière mise à jour — juillet 2026
heliolocal (Stéphane Rosso, EI), SIRET 484 271 499 00036, 45 rue Charles de Gaulle, 02500 Hirson — contact@heliolocal.fr.
Uniquement les données que vous fournissez : nom, email, téléphone, message, et adresse de livraison lors d'une commande. Les paiements sont traités par Stripe ; heliolocal ne collecte ni ne stocke aucune donnée bancaire.
Répondre à vos demandes (intérêt légitime / consentement) et traiter et livrer vos commandes (exécution du contrat). Vos données ne sont ni vendues ni cédées à des fins commerciales.
heliolocal et ses prestataires strictement nécessaires : hébergeur (OVH), paiement (Stripe), transporteur.
Données de contact : jusqu'à 3 ans après le dernier échange. Documents liés aux commandes : selon les obligations comptables légales (jusqu'à 10 ans).
Accès, rectification, effacement, opposition, portabilité (RGPD). Pour les exercer : contact@heliolocal.fr. Réclamation possible auprès de la CNIL (cnil.fr).
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A communication gateway that reads your inverter and battery over Modbus RS485 and publishes their measurements to Home Assistant, locally.
A finished, plug-and-play product — the cloud-free alternative (no more Solarman) with no tinkering (no Raspberry Pi to build/configure).
| heliolocal | Solarman | Solar Assistant | dSolar | |
|---|---|---|---|---|
| 100% local, no cloud | ✓ | ✗ | ✓ | ✓ |
| Finished product, plug and play | ✓ | ~ | ✗ | ✗ |
| Fits into your home automation (Home Assistant) | ✓ | ✗ | ~ | ✗ |
| Also reads the battery BMS | ✓ | ✗ | ~ | ~ |
| Support in France | ✓ | ✗ | ✗ | ✗ |
| Price | 89 € | cloud | ~€90 (DIY) | free, self-build |
Price : 119 €89 €
Home Assistant is the most widely used open-source home automation software in the world. It's free, it runs entirely locally — and it takes several evenings to install, understand and configure.
That's exactly what we do for you. The box arrives prepared, with your equipment already declared and a dashboard that makes sense from the very first screen. You plug it in, it works.
And the day your internet connection drops, your home keeps obeying: nothing goes through a remote server.
Remotely too: we work on site in the Aisne region and nearby, but the box can just as easily ship configured anywhere. What can't be done remotely is electrical wiring — for that you need a professional near you, and we provide the diagram.
| heliolocal | Off-the-shelf hub | Home Assistant alone | |
|---|---|---|---|
| Works without internet | ✓ | ✗ | ✓ |
| No account, no subscription | ✓ | ✗ | ✓ |
| Delivered already configured | ✓ | ~ | ✗ |
| Your data stays at home | ✓ | ✗ | ✓ |
| Accepts mixed brands | ✓ | ~ | ✓ |
| You can take it over yourself | ✓ | ✗ | ✓ |
| No evenings spent configuring | ✓ | ✓ | ✗ |
Price : from 490 € · custom integration: on quote
Diverts your photovoltaic surplus to the water heater by modulating the power (phase control), to minimise grid export.
Multi-point and 100% local — designed for the Linky meter (off-peak/peak), open to Home Assistant, with no cloud app.
| heliolocal | MyEnergi Eddi | iBoost+ | |
|---|---|---|---|
| 100% local, no cloud | ✓ | ✗ | ✓ |
| Multi-point metering | ✓ | ✗ | ✗ |
| Linky off-peak/peak (France) | ✓ | ~ | ~ |
| Open to Home Assistant | ✓ | ~ | ✗ |
| Price | 139 € | ~€400–580 | ~€290–410 |
Price : 180 €139 €
Complete photovoltaic installation, installed and commissioned by us: assessment, equipment supply, mounting, wiring, connection and configuration. You produce your own electricity and store your surplus.
Above all: you monitor all your production live on a tablet or smartphone (production, grid, battery, self-consumption) — 100% local, no subscription and no proprietary app. Your data stays with you.
(On-site service in France.)
| heliolocal | Traditional installer | |
|---|---|---|
| Tablet / smartphone monitoring | ✓ | ✗ |
| 100% local, no subscription | ✓ | ✗ |
| Deye inverter + high-quality batteries | ✓ | ~ |
| Custom configuration and monitoring | ✓ | ~ |
| Single, direct point of contact | ✓ | ~ |
Price : On quote — free assessment
The true brain of a camper van: a touchscreen dashboard that brings together on a single interface the solar energy, battery status, water levels (fresh and grey), temperature, air quality and navigation, and controls the lighting, pumps and equipment. Everything works locally, with no internet or subscription — even off-grid.
Standalone and off-grid · viewable from home via VPN.
| heliolocal | Simarine VIA | Victron | |
|---|---|---|---|
| Fully integrated out of the box | ✓ | ✗ | ✗ |
| 100% local, no cloud | ✓ | ✓ | ~ |
| Based on Home Assistant | ✓ | ✗ | ~ |
| Multi-brand | ✓ | ~ | ✗ |
| Price | dès 399 € | €655+ (bare) | ~€455+ |
Price : from 499 €399 € · custom integration: on quote
High-capacity LiFePO4 storage battery for residential solar systems: 16 kWh usable, built-in BMS, safe and durable.
Above all: 100% readable locally in Home Assistant via our SolarGateway board — no cloud, no proprietary app.
| heliolocal | "Cloud" battery | |
|---|---|---|
| 100% local monitoring (Home Assistant) | ✓ | ✗ |
| No proprietary app / no subscription | ✓ | ✗ |
| Multi-inverter compatible | ✓ | ~ |
| Integration + support by heliolocal | ✓ | ✗ |
Price : 2 490 €
Autonomous grey-water management for a van's dry toilet, by ultrasonic evaporation.
An affordable DIY alternative to off-the-shelf systems.
Price : coming soon
A wireless metering module that reads the pulses from your gas and water meters and publishes the readings to Home Assistant, locally.
Battery powered with a built-in charger: nothing to wire out to the meter, no socket needed.
Gas, water and electricity on the same dashboard — at your place, not at an operator's.
| heliolocal | Operator app | Off-the-shelf WiFi module | |
|---|---|---|---|
| Data kept local, at your place | ✓ | ✗ | ~ |
| No account, no app | ✓ | ✗ | ✗ |
| Gas and water on one module | ✓ | ✗ | ✗ |
| Battery powered, nothing to wire | ✓ | ✓ | ~ |
| In Home Assistant | ✓ | ✗ | ~ |
Price : coming soon
An interface that brings an air conditioning unit into your home automation, locally: temperature, mode, setpoints and status, without going through the manufacturer's cloud.
It connects to the communication port the manufacturer provides for its own accessories. The original controller stays in charge of defrost cycles, safety cut-outs and timers — we send it instructions, we never replace it.
Local control is also what lets the air conditioning run while the sun is producing, instead of showing up on the bill.
| heliolocal | Manufacturer WiFi module | Connected thermostat | |
|---|---|---|---|
| 100% local control | ✓ | ✗ | ~ |
| Works without internet | ✓ | ✗ | ✗ |
| Fits into your home automation | ✓ | ✗ | ~ |
| Combines with solar | ✓ | ✗ | ✗ |
| Original controller preserved | ✓ | ✓ | ✗ |
| No account, no subscription | ✓ | ✗ | ~ |
Price : coming soon
Un boîtier qui s'intercale sur la liaison d'origine entre le panneau de commande et la pompe de votre spa : rien n'est coupé, rien n'est modifié, la garantie du spa est intacte.
Votre spa apparaît alors dans Home Assistant ou Jeedom (MQTT local) : vous voyez la température en temps réel et vous pilotez chauffage, filtration et bulles depuis votre téléphone ou vos automatisations — « chauffe le spa 2 h avant le week-end », « coupe la filtration en heures pleines », « alerte si code erreur ».
Tout reste chez vous : pas de cloud, pas de compte, ça marche même sans internet.
| heliolocal | Télécommande d'origine | Boîtiers cloud | |
|---|---|---|---|
| Pilotage depuis la domotique | ✓ | ✗ | ~ |
| 100 % local, sans compte | ✓ | ✓ | ✗ |
| Automatisations (heures creuses, planning) | ✓ | ✗ | ~ |
| Sans modification du spa | ✓ | ✓ | ~ |
| Fabriqué et suivi en France | ✓ | ✗ | ✗ |
Price : coming soon
A 12.8 V lithium iron phosphate battery built from four 314 Ah cells in series, for roughly 4 kWh. Hand-assembled, compressed, balanced and tested before it ships.
What sets it apart isn't the chemistry, which everyone uses — it's what you can see of it. Its BMS talks over Bluetooth and RS485: Home Assistant reads each cell's voltage, the spread between them, the temperatures and the cycle count. You're not watching a four-bar gauge, you're seeing the real state of your battery.
Before choosing a capacity: tell us what you run and how many days you want to last. Sometimes the right answer is a smaller battery and one more solar panel — we say so when that's the case.
| heliolocal | Budget battery | Lead-acid AGM | |
|---|---|---|---|
| Cell brand disclosed | ✓ | ✗ | ~ |
| BMS model disclosed | ✓ | ✗ | ✗ |
| Every cell readable locally | ✓ | ✗ | ✗ |
| No account, no proprietary app | ✓ | ✗ | ✓ |
| Fits into Home Assistant without a gateway | ✓ | ✗ | ✗ |
| Usable almost in full | ✓ | ✓ | ✗ |
| Sealed case, protected terminals | ✓ | ✓ | ~ |
| Assembled and tested in France | ✓ | ✗ | ✗ |
| Autonomy measured, not calculated | ✓ | ✗ | ✗ |
Price : from 699 € · custom integration: on quote
