DIY solar suitcase

Anything electric, AC or DC

Re: DIY solar suitcase

Postby Tom&Shelly » Tue Jan 30, 2024 11:40 am

I was just watching a video on robot dogs and it occurs to me that if we got one, strapped the solar panel to her back (I assume female robot dogs are better behaved than male robot dogs) we could have her wander around camp all day looking for holes between the trees to gather sunlight. :twisted:

Of course, we would need another robot dog to take with us hiking.... :thinking:

Tom
172912 170466
Tom&Shelly
Palladium Donating Member
 
Posts: 2153
Images: 1900
Joined: Tue Sep 05, 2017 3:27 pm
Location: Upstate New York/New Mexico

Re: DIY solar suitcase

Postby tony.latham » Tue Jan 30, 2024 12:24 pm

video on robot dogs


You obviously haven't smelled robot dog doo. :shock:

Tony
User avatar
tony.latham
Gold Donating Member
 
Posts: 6858
Images: 17
Joined: Mon Jul 08, 2013 4:03 pm
Location: Middle of Idaho on the edge of nowhere

Re: DIY solar suitcase

Postby featherliteCT1 » Tue Jan 30, 2024 12:53 pm

bdosborne,

Thanks for the feedback about your Cerbo GX successfully operating in low temperatures. Good for me to know.

Similar to Lfhoward, I lug around four 100W DIY "portable" panels utilizing glass panels with aluminum frames. They weigh about 20lb each and are cumbersome to haul around. IMHO, some of the lightweight portable panels are a great product for boondockers due to easier storage and being relatively light weight. As I get older and older, the price and quality differential becomes more and more insignificant to me. :D
featherliteCT1
1000 Club
1000 Club
 
Posts: 1114
Joined: Wed Dec 28, 2016 6:54 am
Location: Southern Indiana
Top

Re: DIY solar suitcase

Postby bdosborn » Tue Jan 30, 2024 1:06 pm

Tom&Shelly wrote:Of course, we would need another robot dog to take with us hiking.... :thinking:

I always wanted a pack lama, I wonder how much they poo? You think the neighbors would mind a lama in our backyard? :thinking:
Bruce
2009 6.5'X11' TTT - Boxcar
All it takes is a speck of faith and a few kilowatts of sweat and grace.
Image
Boxcar Build
aVANger Build
User avatar
bdosborn
Donating Member
 
Posts: 5479
Images: 762
Joined: Wed May 05, 2004 11:10 pm
Location: CO, Littleton
Top

Re: DIY solar suitcase

Postby Tom&Shelly » Tue Jan 30, 2024 2:53 pm

tony.latham wrote:
video on robot dogs


You obviously haven't smelled robot dog doo. :shock:

Tony


Right! We'll also need a robot human to walk around with a bag and pooper-scooper...

Tom
172912 170466
Tom&Shelly
Palladium Donating Member
 
Posts: 2153
Images: 1900
Joined: Tue Sep 05, 2017 3:27 pm
Location: Upstate New York/New Mexico
Top

Re: DIY solar suitcase

Postby Tom&Shelly » Tue Jan 30, 2024 2:55 pm

bdosborn wrote:
Tom&Shelly wrote:Of course, we would need another robot dog to take with us hiking.... :thinking:

I always wanted a pack lama, I wonder how much they poo? You think the neighbors would mind a lama in our backyard? :thinking:
Bruce


Depends how big the back yard is. Ours have alpacas, but they're over the ridge about a half mile away.

Tom
172912 170466
Tom&Shelly
Palladium Donating Member
 
Posts: 2153
Images: 1900
Joined: Tue Sep 05, 2017 3:27 pm
Location: Upstate New York/New Mexico
Top

Re: DIY solar suitcase

Postby lfhoward » Thu Feb 01, 2024 2:43 pm

featherliteCT1 wrote:Lfhoward,

I am glad to see that you posted data showing that your Rpi operates in 28.8F temperatures.

My Rpi connects to a Netgear router where the router serves as a LAN (with no www Internet available). Both devices are located inside my trailer.

When temperatures get below 35F, my Victron Connect app has a hard time connecting to the devices. Below 30F, the connectivity is erratic. Below 20F, the devices are not reliable at all and will not stay connected.

Both devices have published operating specs with a lower temperature range of 30F.

Until you posted your data, I could not tell which device was causing the problem or if both devices were causing the problem.

I now think that the Netgear router has been the limiting device.

Regardless, I solved the problem by putting both devices in my insulated battery box wherein my batteries reside. When ambient temperatures are around 30F, the heat generated internally by the devices in the box keeps the devices at 50F. So far, the devices have been running fine, with temperatures consistently about 20F higher than ambient temperatures.

Last week the ambient lows were about 0F, before I located the devices in the box. This week, since I located the devices in the box, the ambient lows have only been about 30F. So far so good. I am curious what the temperature differential will be in extremely cold ambient temperatures.

Normally, I do not look forward to colder temperatures. But, the science must continue! :)

That’s interesting about the Bluetooth not connecting in cold weather. I have never had a problem with that. You could try adding a USB Bluetooth dongle to the Pi, which could take over the job from the Pi’s radio and let it concentrate completely on WiFi. I got this one from TP Link and it works great (no drivers to install). You can turn off the Pi’s native Bluetooth on the Victron menu afterwards.

https://a.co/d/1kcW6sd

Speaking of malfunctioning at cold temperatures, I had tons of issues with my peripherals dropping out below freezing when I used homemade communication cables like these. I don’t recommend trying to save money in this way, for anyone else reading this.

Image

These were like the ones Andy made for the Off Grid Garage and they worked for him because it never gets that cold in sunny hot Australia.

It is worth buying the Victron branded VE.Direct communication cables. I have had zero issues at low temperatures since I did.

https://a.co/d/1iuOy2C
My off-road camper build on an M116A3 military chassis:
http://www.tnttt.com/viewtopic.php?f=50&t=62581
Tow vehicle: 2008 Jeep Liberty with a 4 inch lift.
User avatar
lfhoward
1000 Club
1000 Club
 
Posts: 1357
Joined: Wed Jan 22, 2014 6:10 pm
Location: Philadelphia, PA
Top

Re: DIY solar suitcase

Postby featherliteCT1 » Thu Feb 01, 2024 7:01 pm

You could try adding a USB Bluetooth dongle to the Pi,

Thanks, I will look into that.

I used homemade communication cables

Me too. Then I switched to the $30 OEM Victron cables ... I needed four of them. But they made no difference. Still, I am glad I switched because I have read that the home made cables can cause other problems because they are "non isolated" (whatever that means).

Also, I have developed OCD due to frequent looking at the Cerbo GX Rpi screen to see if it is still working. :frightened:
featherliteCT1
1000 Club
1000 Club
 
Posts: 1114
Joined: Wed Dec 28, 2016 6:54 am
Location: Southern Indiana
Top

Previous

Return to Electrical Secrets

Who is online

Users browsing this forum: No registered users and 1 guest