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From custom embedded firmware to cloud
platforms and mobile apps — we design
and build complete IoT solutions
tailored to your needs.
An end-to-end IoT monitoring platform for solar and off-grid systems — from ESP32 firmware and field integrations to cloud platform, OTA updates, and mobile dashboards.
The Solar System Monitor started as a JK BMS cloud monitor and has grown into a multi-source solar telemetry platform. The ESP32 firmware now combines JK BLE monitoring, RS485 battery protocols, inverter telemetry, Victron data, Cerbo GX Modbus TCP, cloud sync, OTA updates, and app dashboards.
Designed for solar and off-grid energy storage systems, the solution gives users one place to monitor battery cell data, pack health, inverter readings, charger data, temperatures, cloud status, and firmware health. The complete stack — embedded firmware, integrations, cloud API, fleet management, OTA delivery, and app experience — is built and maintained by SystemFreaks.
Purpose-built Arduino/C++ firmware running on ESP32. It reads JK BMS data over Bluetooth Low Energy, supports RS485 battery and inverter telemetry, handles VE.Direct and Victron BLE data, talks to Cerbo GX over Modbus TCP, and syncs live snapshots to the cloud over WiFi.
A custom Blesta-integrated backend provides device registration, license-aware API access, data ingestion, firmware distribution, and administrative visibility across deployed monitors.
The dashboard experience presents batteries, inverters, chargers, Cerbo data, and device status in one place. Users can check live readings, switch between monitors, and review system health from mobile, web, and desktop clients.
SystemFreaks designs and builds end-to-end IoT systems — from embedded firmware and field integrations to cloud platforms and mobile apps.
ESP32
Arduino / C++
BLE / RS485
Victron / Cerbo
Inverter Telemetry
PHP / Blesta
REST API / OTA
Flutter / Dart
Built for live solar-system visibility across mobile, web, and desktop. The dashboard brings battery data, inverter data, charger data, and device health into a consistent monitoring experience.
Solar System Monitor
Available on iOS, Android, Web & Desktop
Combines JK BLE BMS telemetry with supported RS485 battery sources so cell data, pack voltage, current, SOC, SOH, temperatures, and alarms can flow into one cloud model.
Supports battery families and protocols such as Pylontech, Voltsmile, EASUN-compatible, DR-1363, Seplos, and Growatt ESS BMS telemetry.
Reads supported inverter data from Deye, Sunsynk, Growatt, and GoodWe systems, including PV, battery, grid, load, daily energy, total energy, and temperature readings where available.
Adds Victron VE.Direct, Victron BLE, SmartShunt/BMV, MPPT charger, and Cerbo GX Modbus TCP data sources beside the BMS and inverter views.
Devices register with the cloud platform, push fresh snapshots, expose fleet status, and receive remote firmware updates through the same managed backend.
The app and web dashboard provide live battery, inverter, charger, and device-status views with multi-device support and automatic refresh.
United States [$]
United Kingdom [£]
Canada[$]
Greece[€]