Technical specifications for remote installation

[Shankho]

Hello everyone

My name is Shankho Niyogi. I am a graduate student working on episodic tremor events. I recently learned about Raspberry Shake and I am interested to find their application in my research. I am seeking some advice regarding technical specifications for remote installation of Raspberry Shake 3D, preferably 2-3 for months. This is a probable list that I have compiled for powering the RShake and GPS unit,

1. 160 W 12 V solar panel

2. 12V 65 Ah Lead Acid battery

3. Solar charger regulator (L60A USB MPPT Solar Panel Regulators Controllers 12V 24V+2X Power Connector MT)

My question is this that are these enough for sustaining continuous recording for 2-3 months in an area such as Southern California where insolation is above average? I am afraid I have absolutely no idea regarding this.

Also a rough estimate of the power drain and memory consumption of RShake 3D, say, on a daily basis, while continuously recording would be welcome.

Thanks

Shankho Niyogi

Graduate student

Department of Earth Sciences. University of California, Riverside.

alt. email: shankh...@gmail.com

[Eddy]

Hi Shankho,

maybe this information would help?  It is from the RS Manual with 2 examples of solar set up.

https://manual.raspberryshake.org/solar.html

Hope this helps.

Regards,

Eddy

[Ian Nesbitt]

Hi Shankho,

I have a wattage meter arriving Wednesday for my RS3D so hopefully I'll be able to tell you the power demands later this week. Consumption by my device will likely be slightly higher than yours since mine is internet connected and sends data out as UDP packets and I'm assuming your remote installation will not.

Ian

[Shankho]

Hello Eddy 

Thank you for your reply. I have seen that setup and most of the items are similar to that only. However I need more information regarding the sustenance of the batteries and duration of the recording. Unfortunately, that is not mentioned in that page or in the parent URL.

[Shankho]

Hello Ian

Yes, mine will not be connected to the internet so it will be a bit less, still the numbers will be helpful for calculation of the days it can be left unsupervised though. Thank you for your response, please do let me know.

Shankho

[Ian Nesbitt]

Hi Shankho,

I'm happy to help, I think it could be useful for others in the future as well. I plugged in the wattmeter at 02:00 2018-04-04 UTC so I'll try see what it says tomorrow and the next day around this time.

Ian

[Paweł Wiejacz]

Hi,

I guess nobody can tell for sure. The raspberryshake consumes little power, the GPS unit *usually* is also not much power-consuming.

The solar panel is nominally 160 W, but usually this is overestimated by the manufacturer and you never install the panel in such way as to get full power from it. Then the panel works about half of the time and it is not so simple to say this would be equivalent to 80 W continuous working. Charging the batteries never comes with 100% effectiveness. With the passing of time, dust gathering on the panels will also limit their power, unless you get them cleaned from time to time. (Luckily, your installation is not on seacoast and you don't have to worry about seagulls that can render the solar panel installation useless within a few weeks...)

Nevertheless, you should have enough surplus power in your installation to allow the thing work.

Pawel (R9F13)

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[James Skinner]

- Shankho -

Your solar arrangement seems pretty adequate to me other than that I think you will be much better off

by adding a second 12 V 65 A/H battery in parallel so you have ≈ 130 A/H capacity for the system.  The

MPPT charge controller is the best bet good choice.

Jim, K6BPT (R4F29) Tucson, Arizona

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[Ian Nesbitt]

Shankho,

According to the wattmeter, over the course of 72 hours my RS3D consumed 0.14 KWh of energy. I can check back in with it periodically to see if that holds up.

Ian

[Shankho]

Thank you Ian. I will let you know how my setup goes and once I have a robust system setup I will update here regarding the time and battery specifications.

Shankho