Solar Assistant + Raspberry Pi for monitoring

Tinbum
Posts: 1110
Joined: Mon May 31, 2021 9:55 pm

Re: Solar Assistant + Raspberry Pi for monitoring

#11

Post by Tinbum »

Sounds good.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
richbee
Posts: 595
Joined: Tue Apr 19, 2022 3:39 pm
Location: Northumberland

Re: Solar Assistant + Raspberry Pi for monitoring

#12

Post by richbee »

I like the sound of a sub-board of collected knowledge - as a complete newcomer to Home Assistant.
That GitHub page looks good for the inverter control.
Is there any power connection on any of the RS485 pins? I don't have any power sockets in the loft - trying to work out how to get a 5V supply. Presumably the RS232 socket which powers the sunsynk wifi dongle has power built in
Solar PV since July '22:
5.6kWp east/west facing
3.6kW Sunsynk hybrid inverter
2x 5.12kWh Sunsynk batteries
1.6kWp Hoymiles East/West facing PV on the man cave
Ripple DW 2kW
Ripple WB 200W
Oldgreybeard
Posts: 1873
Joined: Thu Sep 09, 2021 3:42 pm
Location: North East Dorset

Re: Solar Assistant + Raspberry Pi for monitoring

#13

Post by Oldgreybeard »

richbee wrote: Thu Oct 27, 2022 9:14 am I like the sound of a sub-board of collected knowledge - as a complete newcomer to Home Assistant.
That GitHub page looks good for the inverter control.
Is there any power connection on any of the RS485 pins? I don't have any power sockets in the loft - trying to work out how to get a 5V supply. Presumably the RS232 socket which powers the sunsynk wifi dongle has power built in

Power is a bit of a PITA I found. I added a small 5V power supply module inside the case of the ESP8266 unit, as there wasn't an easy to access power supply from the Sofar inverter. One thing I'd like to try and find out is the pinout for the DB9 connector that the WiFi logger stick uses. I'm pretty sure that connector is just RS485 together with a 5V power supply, but haven't been able to confirm this or find the pinout. Several inverters seems to use an optional plug in WiFi stick, so there seems to be a fair chance that many have power as well as data available.
25 off 250W Perlight solar panels, installed 2014, with a 6kW PowerOne inverter, about 6,000kWh/year generated
6 off Pylontech US3000C batteries, with a Sofar ME3000SP inverter
Tinbum
Posts: 1110
Joined: Mon May 31, 2021 9:55 pm

Re: Solar Assistant + Raspberry Pi for monitoring

#14

Post by Tinbum »

I tend to prefer wired to WiFi and so use poe for the power.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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