Hast du das mit einen usb-seriell adapter am PC probiert? Dass rx und tx vertauscht sind weisst du ja.
Ich finde das ganze MQTT zeugs ist aufwendig und kompliziert. Ich hätte lieber wenn man den soyo wie bei tasmota mit "http://192.x.x.x/power=200" steuern könnte.
Hab heute gelesen dass ich...
Are there corrosion problems using a heating element designed for AC?
You did misunderstand the "smooth power" thing. My setup is "not inspected", basically illegal, i am not allowed to feed power to the net. I use a "limiter grid-tie inverter" which produces only the power my house needs. I...
My heat-pump has an additional resistive heating element built in. I could abuse that for solar.
I could use it to burn off the excess solar production. Nice and simple idea.
I wonder what is the best way to control the power output of a resistive heater. Must be linear and smooth.
If it was...
Its for residiential warm water. Heats up 300L in an isolated tank. Water will be used during day and replaced with cold water, temp will drop substantially. Runs during 10ct/kwh low energy cost periods at night, 500W continuous, 2kw startup. I can program it to reheat but i prefer not to.
> drain-back solar panel,
Way too much work.
I do search a way to use solarpanels and a grid-tie to run that heatpump.
Problem is on cloudy days i want the pump to run in the night for 10ct/kwh and on sunny days during the day. I coud probably misuse local weather forecast to plan this. But...
Very difficult to know without any input from soyo.
You did misunderstand that.
It could be that the checksum is calculated over all bytes, not only byte 4 and 5. By changing another byte we send a "wrong checksum" and soyo reacts with status message? Not tested.
Today the warm water heatpump runs with night electricity, about 10ct/kwh. Day tariff is 20ct/kwh. Heats up a 300 liter tank to 55 deg C.
I can program the pump to turn on and off at a certain time, but i can not remote control it.
The pump absolutely doesent like brown-outs or to be switched...
That is my control loop attempting at using constant 20W from grid. Green is soyo produced power, blue grid power, orange control term.
The time to recover from dropping load is due to the soyo reacting very slowly.
Actually, the status message can be requested by changing byte 6 in the message to the soyo.
This will provoke a status every 10 messages:
if msgct >= 10:
GTN1000_bytes = 40
msgct = 0
GTN1000_bytes = 128
msgct += 1
We can use "volts x amps" to...
The problem i have is i can not guess the soyo's actual power which causes slow limiting down of power and backfeeding to net for several seconds. I want to avoid that.
Seems the soyo status message is not random, but the answer to some bytes on the bus. Means the status message can be...
Finally seems to work. Ty Cell-King !
Sometimes freaks out, dont know why yet.
it freaks out because of unexpected data over serial. Probably the status report. Input flush solves it.
if this runs reliably i will transfer it to a $20 orangepi.
I have question about the "computeDemand" part:
"use" ist the total amount of watts you consume, measured in between inverter and load?
"currentOutput" is the estimate of what your inverter produces?
I do measure in a different location, between inverter and grid, not between inverter and...
I bought this soyo and it works. But i am not happy with the limiter thing. That is a dumb limiter, cant measure direction of current and needs new cables installed. But luckily you guys did decipher the rs485 code. Did test it with python and $1 rs485-usb, works.
I have 3phases of DDS238 power...