Our boards, local and cloud-free

SolarGateway — datasheet

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).

Interfaces

• 4 isolated RS485 ports on RJ45 connectors
• WiFi · 12 V power · status screen

Compatibility

• Deye hybrid inverters
• Battery BMS and Modbus meters

Integration

• Home Assistant, fully local — no cloud
• Real-time data: production, grid, battery, energy…

Compared to alternatives

Price : 119 €89 €

🖨️ Printable sheet / PDF

Ready-to-use Home Assistant box — datasheet

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.

What you receive

• A compact, silent mini-computer from a recognised maker, to sit near your router. The exact model appears on your quotation — we favour widely available machines, easy to replace and to upgrade
• A 10-inch wall-mounted tablet in kiosk mode: it boots straight into your dashboard, full screen. No browser, no desktop, no icons — it's a control panel, not a tablet you unlock
• A smart plug that looks after the tablet's battery. A wall screen stays plugged in permanently, and a battery held at 100% continuously swells within a year or two, eventually lifting the display. Here Home Assistant cuts and restores the charge by itself: the box protects its own tablet
• Home Assistant installed, updated and configured with your equipment
• A dashboard designed to be read by the whole household, not just by whoever installed it

What is done before it ships

• Your devices are declared and tested one by one
• The automations you asked for are written and verified
• Automatic backups are in place — the thing everyone forgets, and the thing that saves you
• Remote access is set up if you want it, without exposing your home to the internet

What can be connected

• Solar production, battery, electricity consumption, smart meter
• Heating: heat pump, pellet stove, hot water tank, underfloor heating
• Lighting, blinds, sockets, gate, irrigation, swimming pool
• Equipment you already own: much of it can be brought back under local control, some cannot — we check beforehand, never afterwards

Will you depend on us? No

• This isn't in-house software: it's Home Assistant, an open-source project used by hundreds of thousands of households, with a huge community and public documentation
• You get full access to your own installation. You can change anything yourself, call in someone else, or take over entirely
• There is no subscription, no licence, no key that expires. If we vanished tomorrow, your home would carry on working
• We sell time and know-how, not dependency

After commissioning

• Hand-over support is included: the first days are when the questions come
• Adding equipment later is always possible, quoted or done yourself
• You stay the owner of your data: it never leaves your home

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.

Compared to alternatives

Price : from 490 € · custom integration: on quote

🖨️ Printable sheet / PDF

Solar Router — datasheet

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.

Control

• Opto-isolated triac output — phase modulation
• Synchronised to mains zero-crossing
• Relay output (on/off) as a complement

Measurement

• Bidirectional, multi-point energy metering (several clamps)
• Linky / teleinfo reading — off-peak / peak tariff

Connectivity & integration

• Ethernet + WiFi · screen · temperature probe
• Home Assistant, local (MQTT, auto-discovery)

Compared to alternatives

Price : 180 €139 €

🖨️ Printable sheet / PDF

Turnkey solar installation — datasheet

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.)

What's included

• Personalised assessment of your roof and needs
• Deye hybrid inverter (trusted, reliable brand)
• 520 W high-efficiency bifacial solar panels
• High-quality LiFePO4 batteries to store your surplus
• Mounting, wiring and connection
• Full configuration and commissioning
• 10-year equipment warranty (supplier)

The heliolocal plus

• Live monitoring on a tablet or smartphone
• Production, grid, battery and self-consumption in real time
• 100% local, no subscription — your data stays with you

How it works

• 1. Free assessment and quote
• 2. Approval and project scheduling
• 3. Installation and connection
• 4. Configuration, commissioning and handover

Compared to alternatives

Price : On quote — free assessment

Request a free quote →

🖨️ Printable sheet / PDF

Van Dashboard — datasheet

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.

Console

• High-resolution 7″ touchscreen
• On-board configuration & history

What it reads

• Victron solar and JKBMS BMS (Bluetooth)
• Bluetooth-compatible heater
• CO₂ · temperature · presence sensors, water levels, GPS, weather

What it controls

• Wireless relay board — 8 outputs: lighting, water pump, water heater…

Standalone and off-grid · viewable from home via VPN.

Compared to alternatives

Price : from 499 €399 € · custom integration: on quote

🖨️ Printable sheet / PDF

LiFePO4 Battery 16 kWh — 51.2 V — datasheet

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.

Specifications

• Capacity: 16 kWh (51.2 V · 314 Ah)
• Chemistry: LiFePO4 (lithium iron phosphate)
• Built-in BMS: voltage / current / temperature protection
• Communication: RS485 / CAN
• Cycles: [to confirm] · Warranty: [to confirm]

Compatibility

• Solar hybrid inverters (Deye, and compatible)
• Local reading in Home Assistant via the SolarGateway board

Live monitoring

• Charge, voltage, current, temperature, cycles — locally, no cloud or subscription

Compared to alternatives

Price : 2 490 €

🖨️ Printable sheet / PDF

Water recycling — datasheet

Autonomous grey-water management for a van's dry toilet, by ultrasonic evaporation.

Operation

• Automatic control
• Evaporation + ventilated extraction
• Built-in safety features
• Gentle and quiet treatment

An affordable DIY alternative to off-the-shelf systems.

Price : coming soon

🖨️ Printable sheet / PDF

Gas & water meter — datasheet

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.

What it reads

• Gas meter: telemetry output (1 pulse per 10 litres)
• Water meter with pulse output
• Readings and consumption, in real time

How it communicates

• Direct radio link to the SolarGateway — no WiFi to configure
• Published to Home Assistant, locally

Power

• Rechargeable lithium battery, charger built into the module
• No power to run out to the meter

Gas, water and electricity on the same dashboard — at your place, not at an operator's.

Compared to alternatives

Price : coming soon

🖨️ Printable sheet / PDF

Air conditioning control — datasheet

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.

What it does

• Reads the status: temperature, mode, setpoint, on/off
• Sends setpoints from Home Assistant
• Combines air conditioning with solar production and occupancy
• Tracks real consumption instead of estimating it

How it connects

• To the communication port provided by the manufacturer, inside the indoor unit
• The original controller stays in charge: safety, defrost, timers
• On a multi-split, each indoor unit has its own port: 3 units = 3 interfaces

Before ordering

• A compatibility check is essential: depending on your exact unit references, the port is either directly accessible or requires a manufacturer adapter
• Send us your references, the check is free

Local control is also what lets the air conditioning run while the sun is producing, instead of showing up on the bill.

Compared to alternatives

Price : coming soon

🖨️ Printable sheet / PDF

HomeAssistant Contrôleur Spa (Intex & Bestway) — datasheet

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.

Compatibilité

• Spas Intex PureSpa (panneau filaire, ex. SB-H20)
• Spas Bestway Lay-Z-Spa (générations 4 et 6 broches, modèles récents inclus)
• Home Assistant, Jeedom (jMQTT) et toute domotique MQTT

Ce que vous pilotez

• Chauffage marche/arrêt et température de consigne
• Filtration et bulles
• Lecture des codes erreur (encrassement filtre, etc.)

Installation

• Le boîtier s'intercale sur le câble d'origine entre panneau et pompe
• Aucune découpe, aucune soudure, garantie du spa préservée
• Alimenté par le spa — aucune prise supplémentaire

Idées d'automatisations

• Chauffer automatiquement avant vos créneaux habituels
• Filtration pendant les heures creuses uniquement
• Notification si le spa est en erreur ou si la température chute

Compared to alternatives

Price : coming soon

🖨️ Printable sheet / PDF

LiFePO4 battery 12 V — 314 Ah (4 kWh) — datasheet

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.

How many days of autonomy

• 5 days with no recharging at all — and that isn't a calculation, it's a reading taken in a van
• The conditions: compressor fridge, four LED lights for three hours, roof fan for four hours, one hour of television, two phones charged, plus standby draw. About 640 Wh per day
• Autonomy is worked out on 80% of capacity, never 100%: claiming more would be selling you paper
• Run the numbers for YOUR equipment: the autonomy calculator is at heliolocal.fr/autonomie.php — fridge, lighting, fan, television, and it tells you the capacity you need

Depending on the capacity

• 105 Ah — about 1.3 kWh — nearly 2 days
• 150 Ah — about 1.9 kWh — nearly 2.5 days
• 200 Ah — about 2.6 kWh — about 3 days
• 280 Ah — about 3.6 kWh — about 4.5 days
• 314 Ah — about 4.0 kWh — 5 days (the model offered here)

What you see in Home Assistant

• The voltage of each of the four cells, and the spread between highest and lowest
• State of charge, current in both directions, temperatures
• Accumulated cycle count — the only real measure of a battery's wear
• All of it locally, over Bluetooth or RS485. No account, no server, nothing leaving the vehicle

What's inside — and why we tell you

• 314 Ah LiFePO4 cells from a recognised maker, EVE or CATL depending on supply, new and top grade. The exact brand and batch numbers appear on your invoice
• A JiKong BMS, better known as JK — a proven reference, with active balancing between cells
• A battery comes down to two parts: the cells and the BMS. The rest is a box
• Many keenly-priced batteries name neither. When a seller doesn't say what went inside, the question is worth asking

Build

• IP67 case, stated range -20 to +60 °C, built-in handles and protected terminals
• Cells held under compression, as prismatic cells require
• Full balancing plus a charge and discharge test before dispatch

How long it lasts

• The cell manufacturer states over 8,000 charge and discharge cycles, with 70% of capacity still available at that point
• To picture what that means: even fully emptying and refilling it every single day, that is over twenty years. In a van used a few weeks a year, it will outlast the conversion around it
• And that is exactly why we name the cells. Eight thousand cycles is the specification of new, top-grade cells. Downgraded cells will never reach it — and nobody could tell you, since nobody told you what was inside
• The figure and the name go together. Either one alone is worthless

Options and other capacities

• Remote BMS display, to check the state without a phone: 39 €
• Other capacities (105, 150, 200, 280 Ah) and a 24 V version: on request
• Pricing tracks the cell market, which moves several times a year. A quotation is valid for 30 days

Delivery

• Collection possible at Hirson (02), France
• Shipping: a 25 kg lithium battery falls under regulated transport and is quoted per address. That is why it isn't sold in one click — ask for the quote, the answer comes quickly

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.

Compared to alternatives

Price : from 699 € · custom integration: on quote

🖨️ Printable sheet / PDF