|
12-02-2016, 11:18 PM
|
#1
|
Member
Join Date: Apr 2005
Location: CENTRAL CA.
Posts: 43
|
Residential Fridge
I have added a Magic Chef Residential 10 cu ft refrigerator to the old Astoria and wanted to ask you wise gentlemen a question. I presently run 4 deep cycle batteries with a ps 2000 watt inverter. Would it be better to install 2 more battery's or put in a dedicated inverter with the 2 batteries.
Richard
|
|
|
|
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
12-03-2016, 01:15 AM
|
#2
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
You may not need more batteries, but if you decide you do, increase the size of the bank rather then having two separate banks.
The reason for this is that you will get more life out of running down the larger bank to 75% than running down a smaller bank to 50%.
If you were to lookup ( DOD ), depth of discharge, on a deep cycle battery, the graph will show that the deeper the discharge, the less of them you will get from the battery.
|
|
|
12-03-2016, 08:21 AM
|
#3
|
Registered User
Join Date: Feb 2008
Posts: 3,607
|
It really depends on how you RV. We have a household refer on a dedicated inverter. The reason we chose to go that way is that we boondock a lot. With the dedicated inverter we can and do turn our Bus house inverter OFF when in the weeds. This way we eliminate the inefficiency loss we see on our large inverter even when we're powering nothing but the refer, but we also eliminate all the phantom losses and power uses that your manufacturer hooked to your inverter and didn't tell you about. Also, we travel with the inverter off and let the engine charge house batteries. Refer stays powered but again all unknown loads that the big inverter would be powering are eliminated. We get a faster and more complete battery charge.
If you generally stop at hookup sites, there's little reason to go through the extra expense and trouble of a dedicated inverter as you're operating on shore power, not internal power. As to whether the 4 batteries will hold enough charge to support your refer, that one is hard to answer. It should, but it depends on how many times your refer door is opened, do you have cold water in the door, does the refer make ice and do you use a lot of it, and what the temp outside, inside and surrounding the refer is (parked with refer side south in the desert in summer will be different from Alaska). Of course if you're boondocking you are also using power for other things and this will have a large impact.
I'd suggest trying just the refer on the house batteries and see how it goes. If you heed to run the genny more than you like, you can then go to other solutions. We have 810W of solar on the roof which definitely helps and use the entertainment system seldom when boondocking.
|
|
|
12-03-2016, 09:55 AM
|
#4
|
Senior Member
Join Date: Jul 2014
Posts: 35,317
|
As far as 1 or 2 inverters, I run a 2000 watt Xantrex psw inverter for everything. It draws <.5 amps while on, in idle mode.
A Xantrex 1000 watt psw inverter draws the same amount.
You will need one on all the time for the fridge anyway, so having a second, for other uses, will double your draw, while both are on.
Since the one is on anyway, get one to cover all of the loads. They only draw the power they need to cover the load your asking.
A 2000 watt inverter, running at 1000 watts, will not draw more then a 1000 watt inverter running at 1000 watts.
|
|
|
12-03-2016, 10:10 AM
|
#5
|
Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
|
I have 4 8D batteries for the house with a 3000 watt PSW inverter and have a Jenn Air refer/freezer. Going to all electric would have gotten my rig 2 add'l 8D batteries and a second PSW inverter.
I did remove the propane cooktop and replaced it with an induction unit, but it won't run off the inverter till I do some rewiring. Since it can draw 1500 watts I'll have to watch my load and draw down after doing the rewiring or add the 2nd inverter and 2 batteries ($$$).
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
|
|
|
12-04-2016, 06:37 AM
|
#6
|
Senior Member
Winnebago Owners Club
Join Date: Feb 2008
Posts: 728
|
Quote:
Originally Posted by quickiwe
I have added a Magic Chef Residential 10 cu ft refrigerator to the old Astoria and wanted to ask you wise gentlemen a question. I presently run 4 deep cycle batteries with a ps 2000 watt inverter. Would it be better to install 2 more battery's or put in a dedicated inverter with the 2 batteries.
Richard
|
When you said 4 deep cycle batteries, how many usable amp hours do they have?
I have a 10.3 cubic foot residential fridge. It is powered by a Xantrex 2000 watt inverter/charger with 4 each, 6 volt, golf cart batteries for a usable 200 amp hours. At night when inverter and fridge on, other appliances on stand by it uses approximately 10 amp hours per hour for a total of 80 amp hours per night. 4 deep draw GC batteries give me ample power before charging is required. Usage is approximate depending on outside temps and not opening the fridge.
Hope this helps.
|
|
|
12-04-2016, 08:47 AM
|
#7
|
Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,754
|
The new residential refers draw very little power, I would think a dedicated inverter and more batteries are not necessary.
__________________
2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
|
|
|
12-04-2016, 03:11 PM
|
#8
|
Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,519
|
If the fridge runs ok on what you have, there is no need to change inverters. Especially if the existing one is a pure sine type. Motors and compressors like pure sine better than modified sine - they run more efficiently and heat up less.
As for additional batteries, that is strictly a matter of how long you want to run off-grid. I would think the existing 4 batteries would be adequate for most needs, but if you are running low before you can recharge, either add batteries or get larger AH models. Or both.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
Search this Thread |
|
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|