Solar Inverter Protocols and KNX Self-Consumption Automation
Protocol-level guide to solar inverter KNX integration — SunSpec Modbus register map, port and unit ID differences per brand, PV self-consumption surplus calculation, and grid zero-injection control via KNX Modbus write.
SunSpec Modbus Register Map: AC Power, Battery SOC and Energy Across Solar Brands
Complete SunSpec Modbus register reference for solar inverters — Model 103 AC power at register 40083, Battery Model 802 SOC at 40255, brand-specific port and unit ID table (SolarEdge port 1502, Huawei port 6607, Fronius port 502), scale factor application, and KNX Modbus gateway commissioning verification.
Huawei SUN2000 Inverter: Smart Dongle Setup and KNX Modbus TCP Integration
Integrating Huawei SUN2000 inverters with KNX via the SDongleA-05 Smart Dongle — enabling Modbus TCP in FusionSolar app, port 6607 unit ID 0 configuration, holding register map (active power 32064, battery SOC 32087, grid power 32261), SG Ready forced charge via register 47500, and troubleshooting the common port 502 error.
PV Self-Consumption KNX Logic: Surplus Calculation and Multi-Load Priority Control
KNX self-consumption logic for PV surplus management — grid power signed input from smart meter Modbus, load priority table (water heater, EV charger, battery forced charge), MDT Logic Controller ETS6 implementation, hysteresis to prevent relay chatter, dynamic EV current calculation, and grid zero-injection control.
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