Welcome to RVForums.com
- Register now and join the discussion
- Friendliest RV Community on the web
- Modern site for PC's, Phones, Tablets - no 3rd party apps required
- Ask questions, help others, review campgrounds
- Get the most out of the RV Lifestyle
- Invite everyone to RVForums.com and let's have fun
- Commercial/Vendors welcome
Login Register
- Owner Clubs
- Newmar Owners Club
- Thread starterredbaron
- Start dateYesterday at 11:29 AM
Welcome to RVForums.com
- Register now and join the discussion
- Modern secure site, no 3rd party apps required
- Invite your friends and let's have fun
- Commercial/Vendors welcome
- Friendliest RV community on the web
RegisterLog in
redbaron
Staff member
RVF Moderator
- Joined
- Nov 3, 2019
- Messages
- 2,257
- RV Year
- 2022
- RV Make
- Newmar
- RV Model
- London Aire 4551
- RV Length
- 45
- Chassis
- Spartan
- TOW/TOAD
- 2020 Jeep Wrangler Unlimited Rubicon
- Yesterday at 1:57 PM
- #21of36
Rd1 said:
fwiw, this discussion might interest you, re dc to dc nor special BIM
Maybe switching to Lithium House Batteries - iRV2 Forums
I'm sure thhe info I am looking for has already been addressed in this great form, but I can't find it so: I have a 2018 New Aire and the AGM house batteries need replacing. Am considering going
www.irv2.com
Thanks…that does help.
redbaron
Staff member
RVF Moderator
- Joined
- Nov 3, 2019
- Messages
- 2,257
- RV Year
- 2022
- RV Make
- Newmar
- RV Model
- London Aire 4551
- RV Length
- 45
- Chassis
- Spartan
- TOW/TOAD
- 2020 Jeep Wrangler Unlimited Rubicon
- Yesterday at 1:58 PM
- #22of36
Kevin D Pem said:
Well, not really! It's said a lithium battery acts much the same way a capacitor reacts! It will completely discharge very fast!
I could see modifying the relay system to switch the starting system from one battery to the other. But to introduce a short circuit to a lithium battery is pure suicide!!! Thank God your lithium battery has short circuit protection!!!
And the additional DC to DC charger will also protect against reverse /short
Kevin D Pem
RVF 1K Club
- Joined
- Jul 29, 2020
- Messages
- 4,082
- Location
- AZ
- RV Year
- 1984
- RV Make
- Alpinelite
- RV Length
- 26'
- TOW/TOAD
- 2016 Ram 1500
- Fulltimer
- Yes
- Yesterday at 2:06 PM
- #23of36
redbaron said:
And the additional DC to DC charger will also protect against reverse /short
We are not even talking about the same circuit!!!
The only time the load circuit touches the charge circuit is at the batteries!!! What the charge circuit offers is independent from, therefore does not apply to the load circuit!!! Diagram it out!!!
redbaron
Staff member
RVF Moderator
- Joined
- Nov 3, 2019
- Messages
- 2,257
- RV Year
- 2022
- RV Make
- Newmar
- RV Model
- London Aire 4551
- RV Length
- 45
- Chassis
- Spartan
- TOW/TOAD
- 2020 Jeep Wrangler Unlimited Rubicon
- Yesterday at 2:12 PM
- #24of36
I am talking about the house side at the solenoid. Putting a dc to dc there facing the solenoid will prevent reverse flow to the lithium but will allow the lithium to power the solenoid and thus power the chassis battery.
If a short occurs, it’s limited to 50amp before protection kicks in.
Ddmo
RVF Supporter
- Joined
- Aug 20, 2022
- Messages
- 58
- RV Year
- 2023
- RV Make
- Newmar
- RV Model
- Dutch Star
- RV Length
- 43
- Chassis
- Freightliner
- TOW/TOAD
- Ram 1500
- Fulltimer
- No
- Yesterday at 2:22 PM
- #25of36
Neal said:
This?
Sure looks interesting.
Yes. That’s it.
Kevin D Pem
RVF 1K Club
- Joined
- Jul 29, 2020
- Messages
- 4,082
- Location
- AZ
- RV Year
- 1984
- RV Make
- Alpinelite
- RV Length
- 26'
- TOW/TOAD
- 2016 Ram 1500
- Fulltimer
- Yes
- Yesterday at 3:02 PM
- #26of36
redbaron said:
I am talking about the house side at the solenoid. Putting a dc to dc there facing the solenoid will prevent reverse flow to the lithium but will allow the lithium to power the solenoid and thus power the chassis battery.
If a short occurs, it’s limited to 50amp before protection kicks in.
Clearly we are reading a different book! I'm still talking about using a boost circuit, on the load circuit. Connection from lithium to "weak" agm or other battery, is by definition a short!
redbaron
Staff member
RVF Moderator
- Joined
- Nov 3, 2019
- Messages
- 2,257
- RV Year
- 2022
- RV Make
- Newmar
- RV Model
- London Aire 4551
- RV Length
- 45
- Chassis
- Spartan
- TOW/TOAD
- 2020 Jeep Wrangler Unlimited Rubicon
- Yesterday at 3:11 PM
- #27of36
So am I.
Boost is what activates the solenoid to provide the functionality.
Using my design would allow this feature to work for boosting the chassis and let it start safely off the lithium house battery.
The existing circuit for charging the house from alternator would have the DC to DC facing the house battery. This provides for the function as originally designed, while offering protection of shorts and ensuring current draw doesn’t exceed 50amp.
If the chassis battery’s are internally shorted or truly dead, then the boost feature is irrelevant and won’t help anyway. But if they are just very low, it will work the way it did prior to lithium.
Richpatty
RVF Supporter
- Joined
- Nov 2, 2019
- Messages
- 664
- Location
- Wesley Chapel, NC
- RV Year
- 2017
- RV Make
- Newmar
- RV Model
- Ventana 4310
- RV Length
- 43
- Chassis
- Freightliner
- Engine
- 400hp
- TOW/TOAD
- 2007 CR-V
- Fulltimer
- No
- Yesterday at 4:17 PM
- #28of36
Kevin D Pem said:
Clearly we are reading a different book! I'm still talking about using a boost circuit, on the load circuit. Connection from lithium to "weak" agm or other battery, is by definition a short!
Huh?
Kevin D Pem
RVF 1K Club
- Joined
- Jul 29, 2020
- Messages
- 4,082
- Location
- AZ
- RV Year
- 1984
- RV Make
- Alpinelite
- RV Length
- 26'
- TOW/TOAD
- 2016 Ram 1500
- Fulltimer
- Yes
- Yesterday at 6:29 PM
- #29of36
Richpatty said:
A quote!
"
In the context of a battery (or any power source), we usually mean it to be a load that is far too large for the source. Any battery, whether a high voltage or low voltage battery, will be 'short-circuited' by putting a low or zero resistance load on it.
A short circuit usually produces damaging conditions for the battery, and the load, if maintained for enough time. At best, the battery will be run down quickly. At worst, the battery may catch fire, burst itself or its container, or the load start a fire."
redbaron
Staff member
RVF Moderator
- Joined
- Nov 3, 2019
- Messages
- 2,257
- RV Year
- 2022
- RV Make
- Newmar
- RV Model
- London Aire 4551
- RV Length
- 45
- Chassis
- Spartan
- TOW/TOAD
- 2020 Jeep Wrangler Unlimited Rubicon
- Yesterday at 7:38 PM
- #30of36
Kevin, one of us is clearly confused on the purpose of the DC to DC charger I have mentioned.
I will do some more research because right now I feel pretty confident in my design and intended usage.
Similar threads
M
Ventana 3407 dragging in back
- mgilles0
- Apr 16, 2024
- Newmar Owners Club
- Replies
- 3
- Views
- 258
Apr 16, 2024
mgilles0
M
B
2022 Dutch Star Traveler Satellite
- benmartinez2
- Jul 12, 2023
- Newmar Owners Club
- Replies
- 9
- Views
- 977
Jul 12, 2023
Just George
J
R
Potential RVGolf Resort in Ohio
- Regisp71
- Feb 29, 2024
- Newmar Owners Club
- Replies
- 1
- Views
- 226
Feb 29, 2024
Neal
Aftermarket Shocks For 2022 Newmar Ventana 3407
- No Plan
- Jul 13, 2023
- Newmar Owners Club
- Replies
- 6
- Views
- 1K
Jul 15, 2023
Rich W.
R
Basem*nt door hinge failure on 2022 4081
- Rustymayes
- Jul 9, 2023
- Newmar Owners Club
23
- Replies
- 24
- Views
- 3K
Aug 11, 2023
Kevin D Pem
Share this page
Latest posts
B
Wood Design RV Furniture Desk replacement for Booth
- Latest: bowpulpit
Newmar Owners Club
Andrew Steele video
- Latest: SteveMA
Newmar Owners Club
QuestionBIM in 2022 LADP?
- Latest: SteveMA
Newmar Owners Club
Nitrogen in tires
- Latest: rvkev
Tires and Accessories
Possible water in gas? Old gas?
- Latest: AbdRahim
Class A Motorhomes
Latest media
Latest resources
Resource icon
Trueline Leveling System (Valid Air)
Operation & Service Manuals for the Valid Air leveling system
- Jim
- Updated:
Resource icon
Tough Top Awning and Slide Topper How-To's
awning and slide topper replacement videos
- Neal
- Updated:
Resource icon
Notes on the Electrical Systems of the Roadtrek Zion Family of RVs
Notes on the Electrical Systems of the Roadtrek Zion Family of RVs
- dilbertjth
- Updated:
Resource icon
2024 New Aire 3549 Build Sheet
3549
- McRob
- Updated:
Resource icon
Slide controller programming DCS-100 (dual motor)
slide controller programming guide
- Neal
- Updated:
- Owner Clubs
- Newmar Owners Club