Riku Mattila :verified: on Nostr: npub1f26vx…fm0x7 It's a part of the #Fronius #solar ecosystem, meant to divert the ...

npub1f26vxl2l6z2gdaynrwlsmej8cgm9u0mzvxe2aqnhc887hj8zexzq2fm0x7 (npub1f26…m0x7) It's a part of the #Fronius #solar ecosystem, meant to divert the solar surplus to a water heater. Here I just use its thermal sensor to plot the temperature of the 1,400-liter central heating tank.

Left and right peaks are wood firings, 3 middle ones are the 4.5 kW resistors working at full power.