Novolto provides a plug‑and‑play immersion heater that automatically converts surplus photovoltaic electricity into hot‑water heat for residential storage tanks. A certified meter‑reading module detects real‑time PV over‑production and triggers the heater, while a mobile app and open APIs enable remote control, energy analytics, and integration with smart‑home platforms. The system increases solar self‑consumption, reduces reliance on fossil‑fuel heating, and lowers household energy costs.
Funding
Funding not disclosed
Founders
Product
Problem
Homeowners with photovoltaic (PV) systems often generate more electricity than their immediate load can consume, resulting in excess energy being fed back to the grid instead of being used for domestic heating. This reduces the economic and environmental benefits of self‑generated solar power and maintains reliance on fossil‑fuel‑based hot‑water heating.
Solution
Novolto offers a smart immersion heater that directly converts surplus PV electricity into thermal energy for domestic hot‑water storage. A dedicated meter‑reading module detects real‑time PV over‑production and automatically activates the heater, even with power inputs as low as 20 W. The unit is plug‑and‑play, connects to the home Wi‑Fi or LAN, and is managed through a mobile app that monitors consumption, temperature, and savings. Open APIs enable integration with popular smart‑home platforms (e.g., Home Assistant, MQTT) and energy‑monitoring devices such as Shelly, Tibber Pulse IR, and PowerOpti. Installation is designed for DIY users, with optional professional mounting services available. The system thus increases self‑consumption, lowers fossil‑fuel heating costs, and reduces CO₂ emissions.
Target Audience
The primary customers are residential homeowners who own a PV system and a hot‑water storage tank and want to maximize solar self‑consumption while reducing reliance on gas or oil heating. Secondary users include small‑scale property managers and eco‑focused DIY enthusiasts seeking a plug‑and‑play renewable heating solution.
Features
- 2.3 kW immersion heater with continuous operation down to 20 W, converting electrical surplus into hot water.
- Real‑time surplus detection via a certified meter‑reading device that triggers the heater automatically.
- Mobile app for remote control, energy‑usage analytics, temperature set‑points, and savings estimation.
- Open‑source integration via MQTT, Home Assistant, and REST APIs; compatible with Shelly, Tibber Pulse IR, and PowerOpti energy meters.
- Plug‑and‑play hardware: single‑phase AC input, built‑in power supply, and corrosion‑resistant stainless‑steel construction for long‑term durability.
- DIY‑friendly installation kit (muff‑or‑flange fitting, sealing ring, QR‑code registration) with optional certified installer service.
- 90‑day money‑back guarantee and free shipping; optional bundles include additional energy‑monitoring hardware.
- Local data processing option for users who prefer on‑premise control without cloud dependency.