Reply
 
Thread Tools Display Modes
 
Old 12-17-2017, 12:15 PM   #1
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
Alternator to bank. DC to DC charger

What are you guys using to charge your solar bank by way of the alternator when you are rolling? I have several other avenues covered for charging but might as well take advantage of this big alternator.

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-17-2017, 12:16 PM   #2
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
If i could get in under $300 it would be great. But the bus gets a Christmas present.

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-17-2017, 12:25 PM   #3
Bus Nut
 
Join Date: Jun 2016
Location: Orange County, CA
Posts: 678
Year: 1990
Coachwork: integral
Chassis: Crown Supercoach II (rear engine)
Engine: Detroit 6V92TAC, DDEC 2, Jake brake, Allison HT740
Rated Cap: 37,400 lbs GVWR
Vehicle alternators don't do a good job of charging deep-cycle batteries; they're intended to charge SLI batteries which have a different intended use and internal construction than deep-cycles. You should be using a proper 3-stage charger such as a good charge controller or inverter/charger, ideally with programmable settings for the specific battery types. If you have a switchable connection between the house and start batteries for boosting the start batteries in cold weather, it could also theoretically be used to charge the house bank as you drive. Does your alternator have enough power to do so without overheating? More to the point, why is your PV array not producing power while you drive? Just wondering!

John
Iceni John is online now   Reply With Quote
Old 12-17-2017, 02:10 PM   #4
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
Quote:
Originally Posted by Iceni John View Post
Vehicle alternators don't do a good job of charging deep-cycle batteries; they're intended to charge SLI batteries which have a different intended use and internal construction than deep-cycles. You should be using a proper 3-stage charger such as a good charge controller or inverter/charger, ideally with programmable settings for the specific battery types. If you have a switchable connection between the house and start batteries for boosting the start batteries in cold weather, it could also theoretically be used to charge the house bank as you drive. Does your alternator have enough power to do so without overheating? More to the point, why is your PV array not producing power while you drive? Just wondering!

John
I have a big alternator. Pushes 260. The solar array does charge the batteries, but we can use quite a bit of electricity. I'm mostly DC. But after a long night i wake up and the bus batteries could be down around 10 v. I have a generator. Very quiet. Bigly quiet. A little drive would charge me tip top real easy.

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-17-2017, 02:13 PM   #5
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
I have 4 of these

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-17-2017, 03:09 PM   #6
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
Or can i just use my 30 amp mppt solar charge controller somehow

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-17-2017, 03:47 PM   #7
Bus Nut
 
Join Date: Oct 2014
Location: Kent, WA (Seattle)
Posts: 408
Year: 1987
Engine: 6.9L Diesel
I have a "magnum smart battery combiner". I don't know if I recommend it, I bought into it because I already got a magnum inverter and I thought it would be neat. It joins my house batteries and bus batteries when they share a voltage range (I think my voltage range is 12.8-13.8v but I don't remember. It will transfer up to 25amps when within the voltage range but will isolate the two batteries. My bus batteries died and I haven't gotten around to charging them yet. So I don't really know if it's worthwhile to use the magnum smart battery combiner. I have both battery banks hooked up to my Bogart 2030 Battery monitor so I can kinda see what's going on. I just thought it would be worth sharing my two cents.

It's worth noting that my china made magnum battery combiner does not feel the same quality as my american made inverter charger.
TAOLIK is offline   Reply With Quote
Old 12-17-2017, 04:55 PM   #8
Bus Nut
 
Jolly Roger bus 223's Avatar
 
Join Date: Sep 2017
Location: Swansboro,NC
Posts: 584
Year: 86
Coachwork: Thomas
Chassis: Ford B700
Engine: 8.2
Rated Cap: 60 bodies
I can't help to much on this but I am going out of my way to keep anything in my house system from drawing any power from my bus starting and running system.
In my head?
If my house has a problem then I can always start up and go home to fix it and if my bus has a problem I can always live in it until I can solve its starting issue/issues.
I want my two completely seperate so if have have an issue with one then it doesn't stop me from using the other.
That's just my way of not depending on an automatic switch or something of the kind going bad and me having to figure it out on the spot?
I am going out of my way to keep them seperate because of that.
Good luck
Jolly Roger bus 223 is offline   Reply With Quote
Old 12-18-2017, 08:20 AM   #9
Bus Nut
 
Dead pirate's Avatar
 
Join Date: Feb 2016
Posts: 286
Quote:
Originally Posted by Jolly Roger bus 223 View Post
I can't help to much on this but I am going out of my way to keep anything in my house system from drawing any power from my bus starting and running system.
In my head?
If my house has a problem then I can always start up and go home to fix it and if my bus has a problem I can always live in it until I can solve its starting issue/issues.
I want my two completely seperate so if have have an issue with one then it doesn't stop me from using the other.
That's just my way of not depending on an automatic switch or something of the kind going bad and me having to figure it out on the spot?
I am going out of my way to keep them seperate because of that.
Good luck
I agree. My 2 systems are completely separate. I learned that lesson long ago

Sent from my LG-LS777 using Tapatalk
Dead pirate is offline   Reply With Quote
Old 12-18-2017, 09:28 AM   #10
Bus Nut
 
JDOnTheGo's Avatar
 
Join Date: Feb 2017
Location: The West
Posts: 844
Year: 1998
Coachwork: MCI
Chassis: 102 EL3
Engine: DD 60
Couple of things. It is important to understand that battery voltage is a very poor indicator of state of charge (unless the battery has been at rest for many hours). A reading of 10 volts on a 12 volt battery is way below 0% state of charge assuming there are no loads on the battery. A much better approach is a battery monitor (such a Victron or Trimetric) that has a big shunt and measures all the electrons going into/out of the bank.

For charging the house bank from the alternator, there are several products such as the Magnum Energy ME-SBC Smart Battery Combiner. These are smart enough to know when to "connect" the systems for charging and when to disconnect them (when discharging).

Hope that helps.
__________________
JD - Full timer out west
Missy - 1998 MCI 102-EL3 - 1.7kW Solar - 10kWh Lithium
My Adventures & Build
JDOnTheGo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:04 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.