211121 & 211128, the "EMCOMM Hub" on Keller at 2000 hours, Sunday, Continued "Information on MESH Network" with Jim, AG6IF and "LiFePO4 RV Conversion from Sealed Lead Acid Technology" with Tony, AJ6GN


Rick KK6CTT
 
Edited

"LiFePO4 RV Conversion from Sealed Lead Acid Battery Technology" with Tony, AJ6GN

I.  The down and dirty:
  • Tony's Aliner camper was equipped with 2x sealed lead acid batteries that were rated at 12-volt and over 200 amp hours.
  • Exchanged the SLA battery with a Renogy 170 Ah LiFePO4 battery; needing to address issues with the new technology that unfortunately is not "plug and play."



  • Discovering and improving existing system issues.
  • This discussion is not a solution for everyone.  The intent is to help those considering something like this the opportunity to become aware of the many facets of:
    • Changing/converting battery technology and what it means in tangible performance differences.
    • Charging systems; what could and should be used to address these technologies.
    • Critical aspects of this equipment in a travel camper (temperature/shock/dust/corrosion...)
    • Power loss based on equipment and line loss (the finer points of a DC system)
  • Tony, AJ6GN, is good on QRZ and if you have questions you can reach Tony through email.  Please put in a subject line that will help him discern good from junk mail.
o  Pages 1-2
  
o  Pages 3-4

o  Pages 5-6


...We hope that everyone had a great Thanksgiving and you continue to enjoy the Holiday Season with family and friends!  We'll see you next week and don't forget, if you want to re-up your membership or give the gift of a membership to KPRA, you can do that by visiting HERE for information or print out the application and send in your request.


Rick KK6CTT
 
Edited


Diagram above credit: https://www.electronics-tutorials.ws/dccircuits/dcp_2.html

Additional information:
  • Ohm's Law review:  The relationship between Voltage, Current and Resistance in any DC electrical circuit was firstly discovered by the German physicist Georg Ohm.
    • Resistance
    • Power as related to Ah or watt hours
    • You need this to help scale your equipment to the desired results.  Without a basic knowledge of this you will either under/over build your system to include problems that may come from not understanding what is happening within the system which will become "learning points" when the blue smoke decides to show up.  Worse yet, the performance of your system may not show signs of smoke but it will be degraded and you might not know why.
o  Pages 7-8
  
o  Pages 9-10
  


Anthony AJ6GN
 

Greetings CTT Rick,
Follow up on last weeks Hub
Let’s call this story “the smallest of black wires”.
After removing the SLA batteries, an empty (save the wiring looms) black battery box remains on the trailer hitch deck. Among the various wiring remained the smallest gauge black wire hardwired into the house-side of the main (+12vdc) in-line fuse holder connectors. This tiny wire not being connected to a power source would go completely unnoticed, unless of course the trailer should breakaway undertow, then the none functioning breakaway trailer brakes would be a vital clue in solving the potential aftermath!
Fortunately restoring power to this black box, provided the opportunity to support a DC Power station in the old battery box.

The 6 location panel provides 2 4.8a usb, 2pair Anderson powerpole, 2 independently switched 12v ‘cig port’.

AJ6GN 
t




On Nov 28, 2021, at 19:46, Rick KK6CTT <rngr86@...> wrote:


<Ohm_s Law.jpg>

Additional information:
  • Ohm's Law review:  The relationship between Voltage, Current and Resistance in any DC electrical circuit was firstly discovered by the German physicist Georg Ohm.
    • https://www.electronics-tutorials.ws/dccircuits/dcp_2.html
    • Resistance
    • Power as related to Ah or watt hours
    • You need this to help scale your equipment to the desired results.  Without a basic knowledge of this you will either under/over build your system to include problems that may come from not understanding what is happening within the system which will become "learning points" when the blue smoke dragon decides to show up.
o  Pages 7-8
<211123, AJ6GN Battery Conversion 07.jpg>
  
<211123, AJ6GN Battery Conversion 08.jpg>

o  Pages 9-10
<211123, AJ6GN Battery Conversion 09.jpg>
  
<211123, AJ6GN Battery Conversion 10.jpg>