Description
Geyserwise Replacement PCB with ESPHome (TSE1 / Delta-T / Max Compatible)
Modernise Your Geyserwise Controller with Local Smart Home Control
Breathe new life into your existing Geyserwise installation without replacing the entire controller. This Geyserwise Replacement PCB with ESPHome is a direct replacement for compatible Geyserwise TSE1, Delta-T, and Max controllers, transforming your water heating system into a powerful, locally controlled smart device.
Pre-flashed with ESPHome, the board integrates seamlessly with Home Assistant, giving you complete control over your geyser from your phone, dashboard, or automation routines, all without cloud services, subscriptions, or third-party apps.
Whether you’re looking to reduce electricity costs, improve your solar hot water management, or simply gain greater visibility into your geyser’s operation, this upgrade provides a reliable and future-proof solution.
Why Upgrade Your Geyserwise Controller?
Instead of replacing your entire Geyserwise system, simply replace the PCB and unlock modern smart home functionality.
Enjoy:
- Local Wi-Fi connectivity
- Native ESPHome integration
- Full Home Assistant compatibility
- Intelligent scheduling and automation
- Faster access to temperatures and system status
- Reliable operation without cloud services
Your existing display, sensors, and wiring remain in place, making this one of the simplest ways to add smart functionality to your water heating system.
Pre-Flashed with ESPHome
No programming or firmware flashing required.
Each PCB is pre-configured with ESPHome, allowing it to integrate directly into Home Assistant in just a few steps.
Benefits include:
- Native Home Assistant discovery
- Local communication over your Wi-Fi network
- Fast response times
- Easy firmware updates through ESPHome
- Highly customisable automations
Because everything runs locally, your geyser continues to operate even if your internet connection is unavailable.
Complete Local Control – No Cloud Required
Unlike many smart home products, this upgrade does not depend on external cloud platforms.
Your data stays on your network while you enjoy:
- Greater privacy
- Improved reliability
- Faster control
- No subscriptions
- No vendor lock-in
Ideal for Home Assistant users who prefer a fully local smart home ecosystem.
Smarter Water Heating
Take control of when and how your geyser heats water.
Using Home Assistant, you can:
- Monitor water temperature in real time
- Create intelligent heating schedules
- Automate heating based on electricity tariffs
- Coordinate heating with solar power availability
- Receive alerts and notifications
- Reduce unnecessary heating cycles
- Integrate your geyser into larger home automations
This helps lower electricity consumption while ensuring hot water is available when you need it.
Designed as a True Drop-In Replacement
This replacement PCB is designed to install directly into compatible Geyserwise controllers with no additional wiring or hardware modifications required.
Compatible with:
It is suitable for many standard electric geyser installations as well as compatible thermosyphon solar water heating systems using supported Geyserwise controllers.
Important Compatibility Information
Please check your controller model carefully before ordering.
This PCB is only compatible with:
- Geyserwise TSE1
- Geyserwise Delta-T
- Geyserwise Max
It is NOT compatible with the older Geyserwise TSE controller.
If you’re unsure which version you have, please contact us before placing your order. We’re happy to help confirm compatibility to ensure you receive the correct product.
Built to Help Reduce Energy Costs
Water heating is one of the largest contributors to household electricity consumption.
By combining ESPHome with Home Assistant automations, you can:
- Heat water only when required
- Take advantage of off-peak electricity tariffs
- Optimise solar-assisted heating
- Eliminate unnecessary reheating
- Better understand your geyser’s operation
The result is a smarter, more energy-efficient hot water system that can help reduce ongoing electricity costs.
Processing Time
Each PCB is flashed, tested, and prepared to order.
Please allow an additional 2–3 business days for preparation before your order is dispatched.
Technical Highlights
| Specification | Details |
|---|---|
| Compatibility | Geyserwise TSE1, Delta-T & Max |
| Firmware | Pre-installed ESPHome |
| Connectivity | Wi-Fi |
| Smart Platform | Home Assistant |
| Control | Local (No Cloud Required) |
| Installation | Direct PCB Replacement |
| Internet Required | No (for normal operation after setup) |
Why Choose This Upgrade?
Instead of replacing your entire Geyserwise controller, this ESPHome replacement PCB delivers the smart functionality modern homes demand while retaining the hardware you already own. With native Home Assistant integration, reliable local operation, intelligent automation, and straightforward installation, it’s the ideal upgrade for homeowners who want complete control over their hot water system without compromising privacy or reliability.
Please remember: this board is designed for Geyserwise TSE1, Delta-T, and Max controllers only. It is not compatible with the older Geyserwise TSE.
