Main components:

• Arduino MEGA 2560 with W5100 ethernet shield
• TM1637 display to show power and voltage
• CT1, measures grid current - YHDC SCT-013-000
• CT2, measures DHW immerser current - DL-CT08CL5 "bobbin"
• CT3, measures UFH buffer tank immerser current - DL-CT08CL5 "bobbin"
• Two Q6016LH2TP 15A 1000v triacs
• Electronics heat sink, 5v PC CPU cooling fan, wires & ironmongery
• Power supplies (2 off). Arduino + stable 6v for mains voltage measurement
• Dallas one-wire DL-CT08CL5 temp sensor + 2.2kΩ resistor (for DHW tank)

Main features of the diverter:

• Measures grid current & volts, import and export
• Diverts excess energy into a choice of two dump loads, max 7.5kW
• Measures current to both dump loads (DHW & UFH tanks)
• Sends data to BPi-M5 & database every 2 seconds to log conditions, via ethernet
• Reads commands from mobile apps and boost switches
• Measures DHW tank temp for temperature control during boost

Input cct diagram for C.T. sensors to Arduino Mega

Section under construction