Lux ac battery controller

martin2020

EVandPV said:

mickyduck55 said:

Yes probably time for me to adjust my GO charge rate.. looks like I will be exporting for most of today.. batteries already at 90% How do you use the Pi with GO, I I have read about using one with Agile

TIA

It uses a script which gets a forecast of what our pv generation will be from Solcast.com via the api and gets the battery soc from the serial cable connected to the pylons then works out how much to grid charge.
The script borrows a couple of lines of ruby code from Octolux to control charging on the Lux but apart from that, it was written from scratch in Python.
It runs on a cron schedule every 15 minutes from 12.30-4.30am.

ive added the script to cron tonight - what needs editing if anything of the solcast script ?

im guessing these paramiters need editing but what are theyasking for exactly

require 'pathname'

require 'net/http'

require 'uri'

require 'json'

require 'time'

EVandPV

martin2020 said:

EVandPV said:

mickyduck55 said:

Yes probably time for me to adjust my GO charge rate.. looks like I will be exporting for most of today.. batteries already at 90% How do you use the Pi with GO, I I have read about using one with Agile

TIA

It uses a script which gets a forecast of what our pv generation will be from Solcast.com via the api and gets the battery soc from the serial cable connected to the pylons then works out how much to grid charge.
The script borrows a couple of lines of ruby code from Octolux to control charging on the Lux but apart from that, it was written from scratch in Python.
It runs on a cron schedule every 15 minutes from 12.30-4.30am.

ive added the script to cron tonight - what needs editing if anything of the solcast script ?

im guessing these paramiters need editing but what are theyasking for exactly

require 'pathname'

require 'net/http'

require 'uri'

require 'json'

require 'time'

Sorry, I was talking about my own scripts written in Python for Octopus Go.
The author of Octolux is on the Navitron forum, he might be able to help you on there.
Having said that, I'm not sure if the Solcast module has actually been implemented in the main Octolux code yet ?? 
There's this line in the rules code ..... "# TODO: bias this based on solcast?"

Solarchaser

EVandPV said:

Solarchaser said:

Yeah I've never trusted that though, my primary batts are both 2017 and yet show 100% soh

You can get the SOH of each module with a serial cable and a terminal app but you need to disconnect your pylons from each other, which is a bit of a PITA. 
Were your 2017 batts 2nd hand ?

Hi mate I got the pylon cable delivered today, and after about 30 mins of installing things it seemed to work, but I don't see anywhere to see the battery soh.

I see capacity,  but thats got to be state of charge as none of mine are above 60% and the state of charge pretty much matches what the lux says

EVandPV

Solarchaser said:

EVandPV said:

Solarchaser said:

Yeah I've never trusted that though, my primary batts are both 2017 and yet show 100% soh

You can get the SOH of each module with a serial cable and a terminal app but you need to disconnect your pylons from each other, which is a bit of a PITA. 
Were your 2017 batts 2nd hand ?

Hi mate I got the pylon cable delivered today, and after about 30 mins of installing things it seemed to work, but I don't see anywhere to see the battery soh.

I see capacity,  but thats got to be state of charge as none of mine are above 60% and the state of charge pretty much matches what the lux says

Hey bud, I don't think you can get soh on the Batteryview app, you'll need to use a terminal app and send the 'soh' command. There's a ton of commands you can send to the pylons, some of them are listed here where the guy shows how to make the serial cable ..... https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/
I use an app on my tablet called Serial USB Terminal and connect the cable with a usb adapter but there will be a way to do it on a Windows machine too.

Solarchaser

EVandPV said:

Solarchaser said:

EVandPV said:

Solarchaser said:

Yeah I've never trusted that though, my primary batts are both 2017 and yet show 100% soh

You can get the SOH of each module with a serial cable and a terminal app but you need to disconnect your pylons from each other, which is a bit of a PITA. 
Were your 2017 batts 2nd hand ?

Hi mate I got the pylon cable delivered today, and after about 30 mins of installing things it seemed to work, but I don't see anywhere to see the battery soh.

I see capacity,  but thats got to be state of charge as none of mine are above 60% and the state of charge pretty much matches what the lux says

Hey bud, I don't think you can get soh on the Batteryview app, you'll need to use a terminal app and send the 'soh' command. There's a ton of commands you can send to the pylons, some of them are listed here where the guy shows how to make the serial cable ..... https://powerforum.co.za/topic/2322-youdas-off-grid-lab/page/2/
I use an app on my tablet called Serial USB Terminal and connect the cable with a usb adapter but there will be a way to do it on a Windows machine too.

Ahh, ok ill give that a go, thanks 

Solarchaser

That's the soh command.
Can you show me what yours looks like?

EVandPV

Solarchaser said:

That's the soh command.
Can you show me what yours looks like?

Same kind of thing.
If you send the 'help' command you'll get a list of the other commands available. There's a whole load of them.

Solarchaser

Yeah I did, and tried several of them, but I was expecting something that said Soh = 90% or similar, not a load of figures without definition of what it means.

I mean do you take the highest voltage and multiply it by 14 to get the potential 100% and then add what you have and devide it by your 100% figure to get a percentage figure?
Then that would only work at fully charged.

EVandPV

Solarchaser said:

Yeah I did, and tried several of them, but I was expecting something that said Soh = 90% or similar, not a load of figures without definition of what it means.

I mean do you take the highest voltage and multiply it by 14 to get the potential 100% and then add what you have and devide it by your 100% figure to get a percentage figure?
Then that would only work at fully charged.

Yeah another way you can gauge it is taking the capacity (ah) figure in Batteryview when the batts are full then divide by 52 and multiply by 100.
So if Batteryview shows say 51ah, that's 51÷52×100=98% soh.
Only trouble is you need to disconnect each batt in your stack from each other if you want a figure for each batt.

Solarchaser

Each one individually said 50ah, which is what I'd expect. 
2400/48v system = 50ah.
My cycle count ranges from 979 to 127 and they all seem to report the same.
Maybe my expectations were just too high tbh