24V-300A battery separator/isolator good price??

[gr8njt]

I am looking to buy Surepower model#3103 battery isolator/separator.
I will install this between the bus starting battery bank and the House battery bank.
Here's the detailed description and specs:www.dan-marcrvparts.com/24vwiaustsup.html
It does multiple battery bank charging, prioritized charging, prevents charging overload, start assist feature and prevents voltage spikes all automatically. However, for $414.04 plus shipping, I would like to consider some cheaper alternative if there is any available.

I already have their model#1315 which is Surepower's 12V-100A version and goes for much cheaper price of only $76.76 plus shipping.

Any suggestions for less expensive automatic battery bank isolator/separator? Thank you

[Gary '79 5C]

Gr8NJT,
Not sure if that is a 'good' price, however if  you wish to go a different route, You may install a 200Amp continous duty relay w/ a 24 volt coil. I separate (4) 8D sealed batts with this type relay and the coil is powered off an iginition wire. Mine goes to the voltage reg.
I did not buy this relay, but pulled it from my coach. It powered the orig. bus A/C condenser motor. I believe new this relay is about $400, used I know it runs $200.
The unit you listed looks great and would do the job as well.

Good Luck, hope this helps
Gary Pasternak

[bruceknee]

How about a n automatic switching Solenoid ACR With Coil Economizer?
· Input voltage 9-36 volts maximum
· Inrush rating 2000 amps DC
· Voltage rating 60 Volts DC
· Stud terminal size 5/16"
· Mechanical life 1000,000 cycles
· Hermetically sealed contacts
· Vaporproof
· Ignition protected
· Safe aboard gasoline powered boats
· Single or double sensing
· UL recognized
· Meets SAE J1171 external ignition protection requirements
· Automatically connects battery banks during the charging cycle and disconnects under discharge
· Override for emergency engine paralleling to start an engine
· Activates whether the charging source is alternator or battery charger
· Output for "ON" indicating LED
· Integrated coil control minimizes heating and amperage draw

$200.  easy to install, easy to use.........you don't have to do anything

 

[gr8njt]

Gary, I appreciate the info.

Right now, I feel like my parts hunting is solely based on price and I'm trying real hard not to make that the deciding factor in my bus conversion.

Bruce, That is great. Do you have one available through your company "Diamond State Conversion"? If so, I will bring a check with me on my next visit to Delaware. That in-rush rating of 2K Amps sounds very reassuring.

BTW, how's the current stock/availability of the eight [8] 12V-215Ah "scrubber batteries"?
For the meantime, I was also able to "win" three auctions off eBay within the last 2 weeks to complete the major parts hunt for my DC generator project: One was for a NIB (manufactured:1/2007) Xantrex SW4024, an almost new Kubota ZB600C-1 twin-cylinder diesel engine and a NIB Mil-Spec dual voltage alternator C.E. Niehoff N1225-1. Talking about large case alternators, this thing is HUGE and heavy at more than a foot long and over 75 pounds. For the winning auction price of $360 vs. retail of $2200, I think it's not a bad purchase at all. Check out the alternator specs: www.ceniehoff.com/products/altDisplay.asp?make_name=N1225-1.
Till next time

[Tom Y]

Gr8, If you decide to to go the 24v contator or solenoid route let me know. I have both used and will trade either one for your 12v seperator.  Tom Y

[gr8njt]

Gr8, If you decide to to go the 24v contator or solenoid route let me know. I have both used and will trade either one for your 12v seperator. Tom Y

Thanks for the offer Tom.
I still need the 12V isolator/separator because the Niehoff N1225-1 to be used in my DC generator project is a dual (14V/28V) voltage Mil-Spec alternator.

In this project, the 12V side of this alternator will charge the Kubota starting 12V battery and will be connected/disconnected to a small-sized 12V (230Ah) bank by the 12V Sure-Power #1315 you're interested in.
 
The 24V side of the alternator will charge a HUGE house 24V (860Ah) bank using the Blue Seas  PN9112 which is a bi-directional 24V isolator, as recommended by Bruce Knee,  to automatically connect/disconnect to the Bus 24V starting battery bank.

[DavidInWilmNC]

Gr8NJT,
Not sure if that is a 'good' price, however if  you wish to go a different route, You may install a 200Amp continous duty relay w/ a 24 volt coil. I separate (4) 8D sealed batts with this type relay and the coil is powered off an iginition wire. Mine goes to the voltage reg.
I did not buy this relay, but pulled it from my coach. It powered the orig. bus A/C condenser motor. I believe new this relay is about $400, used I know it runs $200.
The unit you listed looks great and would do the job as well.

Good Luck, hope this helps
Gary Pasternak

This is what I used:  http://www.grainger.com/Grainger/wwg/itemDetailsRender.shtml?ItemId=1611756367  It's $70 and is rated at 200 amps continuous.  Mine is connected to a switch mounted in the parking brake console.  I can choose to let the combiner solenoid be automatic (need to find out whre to connect this wire), on (for emergency starting since I used group 31 starts, or turn it off completely.  It's relatively small.  The only thing I don't like about it is that is uses 5/16" lugs.  Most 2/0 cable I've come across uses 3/8" or 1/2", but it worked out well.  I researched this quite a bit online before ordering this solenoid, and it seemed to do for others what I want it to do.  Grainger is also the cheapest place I could find it.  Good luck.

David

[RTS/Daytona]

400 amp solenoids--> http://www.hydrogenappliances.com/solenoidrelay.html

200 amp solenoids--> http://commerce1.cera.net/tacbusparts/sections/catalog/catalog.asp?cat_id=70