Now on ESP32-S3 — historian, MQTT & OTA built in

Your solar inverter.
Your network. Your rules.

TerraLync monitors and controls GivEnergy inverters entirely inside your home — live dashboards, scheduling, historian and Home Assistant integration, with zero cloud dependency.

100% local Real-time data ESP32-S3 & Raspberry Pi MQTT + Home Assistant
Get Started Try the Live Demo API Docs
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140+
REST API endpoints
2
platforms — ESP32-S3 & Pi
0
cloud dependencies
24/7
on-device historian
Capabilities

Everything your inverter knows,
finally in your hands

A complete local control plane for your solar plant — monitoring, automation, storage and integrations, all served from a device on your LAN.

Real-time Monitoring

Live power flow, battery SOC, PV strings, grid import/export and load — refreshed every few seconds on a responsive dashboard that works on any device.

On-device Historian

Append-only telemetry recorder with hourly byte-offset indexes on SD card. Chart history, export CSV, backup & restore — even battery cell-level sampling.

Scheduler

Time-based automation for charge, discharge, eco and pause blocks. Build daily schedules per inverter, import and export them as JSON.

MQTT + Home Assistant

Fully asynchronous MQTT publisher with retained state topics and automatic Home Assistant discovery — sensors appear in HA with no YAML.

Quick Settings

Charge Now, Discharge Now, Pause and Resume with automatic state backup and timed auto-resume — instant control when a tariff window opens.

Multi-inverter & Multi-device

Primary plus secondary inverters, three-phase systems, EMS controllers, the GivEnergy Gateway, HV battery stacks and CT meters — auto-detected.

Dual-layer OTA

App-bundle OTA for everyday updates plus partition-level firmware OTA. Atomic swaps, SHA-256 verification and automatic rollback on failure.

Touchscreen UI

A native LVGL interface on the Guition 480×480 display — gauges, charts, scheduler and quick settings — alongside the same web dashboard.

ESP32 microcontroller close-up
Architecture

Everything stays inside your walls

TerraLync talks directly to your inverter's data adapter over Modbus TCP (or USB serial on ESP32) — the same protocol GivEnergy's own app uses, minus the trip through someone else's servers.

  • Inverter → device: direct Modbus TCP on port 8899, heartbeat managed automatically
  • Device → browser: dashboard + REST API served on your LAN at terralync.local
  • Device → home automation: MQTT to Home Assistant, Node-RED or anything that speaks it
  • Device → SD card: telemetry historian and config persist locally, yours to keep
How it works
Platforms

Pick your hardware

From a tiny ESP32-S3 that lives next to your inverter to a full Raspberry Pi hub with plugins — same dashboard, same API, same zero-cloud promise.

ESP32-S3 board
Recommended

TerraLync Lite

Embedded controller on ESP32-S3 — plug it in and forget it

  • Full REST API (~140 endpoints)
  • Historian to SD card + RAM fallback
  • MQTT with HA discovery
  • Scheduler + quick settings
  • Dual-layer OTA with rollback
  • First-boot WiFi setup hotspot
  • Optional LVGL touch UI
ESP32-S3 · ≥8 MB flash · ≥2 MB PSRAM
Download Lite
Solar array
Coming soon

TerraLync

Complete hub on Raspberry Pi — the everything edition

  • Plugin system with SDK
  • Achievements & engineering tools
  • Datalogger command support
  • Multi-inverter management
Raspberry Pi Zero 2 / 3 / 4 / 5

Being rebuilt to Lite parity — downloads coming soon.

Details
Energy landscape at dusk
Touchscreen

TerraLync Touch

Lite + a 480×480 wall-mounted control panel

  • Everything in Lite
  • LVGL touch dashboard
  • Analogue clock & weather
  • Battery cell grid view
  • Quick settings from the panel
  • Same web UI runs alongside
Guition ESP32-4848S040 · ST7701S + GT911
Download Touch
Quick start

Up and running in minutes

Three steps, whichever hardware you choose.

01

Flash

Flash straight from your browser — the web flasher detects your board, downloads the right firmware, and writes everything. Nothing to install, no command line.

02

Join WiFi

On first boot the device hosts an open TerraLync-Setup hotspot. Connect and the config page pops up automatically — enter your WiFi, save, reboot, done.

03

Take control

Open the dashboard from any browser on your network. Live data flows in, historian starts recording, and your inverter is finally yours.

Full installation guide