Reply
 
Thread Tools Display Modes
 
Old 02-21-2007, 07:51 PM   #1
Mini-Skoolie
 
Join Date: Feb 2007
Location: Livingston, Mont. & New Orleans, La.
Posts: 10
House battery system charged by solar & alternator

I'm going to be putting a solar charging system & battery bank in my bus, & I'm wondering if there is some way to integrate it into the bus 'automotive' electrical system so that the house batteries can be charged by the alternator when driving. Is something like this possible? I'm still in the planning stages, so I don't have a lot of specifics of my solar system, other than that I'll have two 120W panels & four 6V batteries.

H.
__________________
1986 Ford E350/Thomas Minotour
PlantDrive TTVTM SVO conversion
rhclayto is offline   Reply With Quote
Old 02-21-2007, 08:44 PM   #2
Bus Crazy
 
Steve's Avatar
 
Join Date: Jul 2002
Location: Central Iowa
Posts: 1,838
Send a message via AIM to Steve
Yes, you can connect it to the buses system. My bus' alternator chargest up my bank, you can use a battery isolator to keep the bus' electrical appliances such as fans and starting the engine from drainging you bank, and to keep your inverter from draining your starting battery.

I do not use the isolator in my bus and it is nice to be able to use my bank to supply power to help start the engine and to have the solar power to trickle charge my engine battery.

Remember to get a big fuse to put between your battery bank your bus' stock system in case a short ever happens between them, your battery bank will have a huge amount of potential energy.
__________________
View my 1972 Ward: Topic from the Build : The Picture Gallery
View my 1986 Blue Bird: Topic from the Build : The Picture Gallery
View my 1960 GMC: Topic from the Build : The Picture Gallery
Steve is offline   Reply With Quote
Old 02-22-2007, 12:20 AM   #3
Mini-Skoolie
 
Join Date: Feb 2007
Location: Livingston, Mont. & New Orleans, La.
Posts: 10
Thanks for the information, Steve.

Quote:
Originally Posted by Steve
I do not use the isolator in my bus and it is nice to be able to use my bank to supply power to help start the engine and to have the solar power to trickle charge my engine battery.
Is there such a thing a a 'switchable' isolator? What I mean is, an isolator that can work as an isolator, but be switched not to isolate, so power can flow through for engine starting, trickle charging, etc.? That would be a useful thing to have if it were possible.

Best wishes,
Henry
__________________
1986 Ford E350/Thomas Minotour
PlantDrive TTVTM SVO conversion
rhclayto is offline   Reply With Quote
Old 02-22-2007, 12:57 AM   #4
Bus Nut
 
oldog12's Avatar
 
Join Date: Aug 2006
Location: Illinois
Posts: 381
You mean like this
http://www.reddenmarine.com/site/images/BEP714100A.jpg
oldog12 is offline   Reply With Quote
Old 02-22-2007, 01:44 AM   #5
Bus Geek
 
the_experience03's Avatar
 
Join Date: Feb 2006
Location: Saint James, MN
Posts: 2,669
Send a message via MSN to the_experience03 Send a message via Yahoo to the_experience03
I broke the rules myself just recently, but I do want to point out that deep cycles really really shouldn't be used for starting. If you have a high enough amp hour capacity bank and the engine is warm you might not do too much damage, but you will drain them down MIGHTY quick any other time.
__________________
http://farm4.static.flickr.com/3024/...09f20d39_m.jpg
Skooling it...one state at a time...
the_experience03 is offline   Reply With Quote
Old 02-22-2007, 07:59 AM   #6
Bus Nut
 
Join Date: Feb 2007
Posts: 263
using the deep cycles to crank the motor is always a bad idea. deep cycles are not designed for short bursts of high current flow as are engine batteries. Also, engine batteries are not designed to be drawn down to a low voltage as deeps are. I guess having that ability in an emergency is a good thing, but, don't make a habit of it.

As for the answer to bypassnig the isolator, sure, it can be done with a bigass high current switch. You simply short past the isolator.
pete c is offline   Reply With Quote
Old 02-22-2007, 10:22 AM   #7
Bus Crazy
 
Elliot Naess's Avatar
 
Join Date: Oct 2005
Location: Clearlake, Northern California
Posts: 2,116
Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
Say, I know of a case where a guy ...

A: ...used two deep cycles for starting, and ...

B: ...he had several starter motors go south on him in short order.

Is there any possiblility that A and B are related? I cannot see how,
but stranger things have happened (to me, anyway). The engine is
a gasser.
__________________
Elliot
Millicent The Bus - roof raised two feet, toy-hauler tailgate.
http://www.skoolie.net/forums/f11/th...gate-1564.html
Elliot Naess is offline   Reply With Quote
Old 02-22-2007, 10:29 AM   #8
Bus Crazy
 
Steve's Avatar
 
Join Date: Jul 2002
Location: Central Iowa
Posts: 1,838
Send a message via AIM to Steve
In my case I have the engine battery and a bank of eight high current UPS batteries all connected together. I have a battery disconnect switch mounted on the engine battery so that I can disconnect it when I get where I am going and not worry about draining it down.
__________________
View my 1972 Ward: Topic from the Build : The Picture Gallery
View my 1986 Blue Bird: Topic from the Build : The Picture Gallery
View my 1960 GMC: Topic from the Build : The Picture Gallery
Steve is offline   Reply With Quote
Old 02-22-2007, 10:53 AM   #9
Bus Geek
 
the_experience03's Avatar
 
Join Date: Feb 2006
Location: Saint James, MN
Posts: 2,669
Send a message via MSN to the_experience03 Send a message via Yahoo to the_experience03
Quote:
Originally Posted by Elliot Naess
Say, I know of a case where a guy ...

A: ...used two deep cycles for starting, and ...

B: ...he had several starter motors go south on him in short order.

Is there any possiblility that A and B are related? I cannot see how,
but stranger things have happened (to me, anyway). The engine is
a gasser.
It usually is the other way around. The starter motor takes the batteries down, not the other way around. The only thing I can think of is that the starter motor wasn't getting enough voltage, but that doesn't seem like kind of thing that will hurt the start itself, but rather the solenoid and other electronics on board.

FYI, it's that voltage drop that kills the batteries. A starter motor, like any electric motor, will draw a certain approximate wattage. Batteries are only able to supply a certain wattage as well. The voltage drops off as you supply more and more amps. With the thick plates, a deep cycle can only supply so many amps, but it keeps getting drawn down by a demanding starter. That low voltage makes short work of breaking up the plates in the battery.
__________________
http://farm4.static.flickr.com/3024/...09f20d39_m.jpg
Skooling it...one state at a time...
the_experience03 is offline   Reply With Quote
Old 02-22-2007, 10:59 AM   #10
Bus Crazy
 
Elliot Naess's Avatar
 
Join Date: Oct 2005
Location: Clearlake, Northern California
Posts: 2,116
Year: 1992
Coachwork: Blue Bird
Chassis: TC-2000 Frt Eng, Tranny:MT643
Engine: 5,9 Cummins
Rated Cap: 84
Right. But I think I've heard of electric motors being harmed by running on low voltage,
so I thought I'd explore it.
__________________
Elliot
Millicent The Bus - roof raised two feet, toy-hauler tailgate.
http://www.skoolie.net/forums/f11/th...gate-1564.html
Elliot Naess 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
House Battery Question Tango Alternative Fuels | Electric, Propane, Wood Gasification, etc. 3 10-06-2014 09:17 PM
Alternator not charing battery (dt466) Seeria Mechanical and Drivetrains 29 01-11-2012 11:15 AM
Using the alternator to charge deep cell battery bikeforthelight Electrical, Charging and Solar 4 10-14-2009 12:05 PM
connecting to the house battery monahowell Everything Else | General Skoolie Discussions 8 10-27-2006 12:40 PM
House battery Cables???? JonCBrand Conversion General Discussions 3 02-22-2005 09:05 PM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.