Hi Darren

If you want to run the stream long term over the Winter, running 24 hours a day, you need to plan for a quite big battery (around 60 - 80Ah) and a big collector (around 200W). 

The power management is handled by the charge controller, which will shut the load off if the battery discharges to a certain voltage and turn it back on when it re-charges to a certain point.

The Focusrite 2nd Gen 2i2 is hard to get hold of, although second hand ones show up.. The Native Instruments Komplete Audio 2 is a good alternative, which to me sounds better than the Focusrite (itself v good imo).

Notes on the 48V setup, including the Simple P48 Mod are here:
https://paper.dropbox.com/doc/Streambox-with-Focusrite-Soundcard--BQK_MjSW7IZOzA7yItQ1eOSdAg-y6K4xLUHuP31BKqhINoND

I'd be happy to discuss in more detail.

Sounds like a great project!

bw
grant


On 9 Aug 2021, at 16:49, Darren Copeland <darren@darrencopeland.net> wrote:

Hello,

I am planning to set up a solar recording/streaming Raspberry Pi. 

I found Grant's document to be helpful - https://paper.dropbox.com/doc/Streambox-Off-grid-with-IQ-Audio-Code-Zero-and-solar-Summer-2021-lod9myP5YfF9Lq4pEnF5F.  I appreciated seeing Wijnand Bredewold's pictures of his setup from July 18 posting. It gave me some ideas for making the setup compact.

I noticed there was nothing in Grant's document about power management, but maybe I overlooked it.

I was wondering what people's experiences are with the PiJuice or other alternatives?  It seems that the PiJuice only works up to 10-12 ah and is currently out of stock, so perhaps there are other solutions at this time? https://uk.pi-supply.com/products/pijuice-standard

I would like to use it with an audio interface connected to the Pi so that I can use phantom powered mics for high sensitivity and no EMI noise.
Grant has suggested the Focusrite 2nd Gen 2i2.  I suppose there are other interfaces too that will work provided they don't require a manual button to turn on power.  I am wondering how much additional power draw I have to account for with the interface?  Has anyone tried the Focusrite or others in a Solar power rig?


Cheers
darren
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