Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 
 


Reply
 
Thread Tools Display Modes
 
Old 07-04-2022, 01:54 AM   #1
Platinum Member
 
Join Date: Nov 2009
Posts: 190
Default Second house battery?

I would like a second house battery. I've bought a small convection oven that pulls 1250 watts. My house battery only has 750 watts.

Is it possible to add a second house battery? And if so, where would I put it?
__________________

soohma is offline   Reply With Quote
Old 07-04-2022, 06:05 AM   #2
Platinum Member
 
Join Date: Dec 2015
Location: Arizona, Tempe
Posts: 1,311
Default

You better start this one over.. 1. what are you putting it in? 2. A second battery will probably not run your convective oven.
__________________

hbn7hj is offline   Reply With Quote
Old 07-04-2022, 10:29 AM   #3
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 10,687
Default

Quote:
Originally Posted by hbn7hj View Post
You better start this one over.. 1. what are you putting it in? 2. A second battery will probably not run your convective oven.

Agree with this and to be able to help figure out what you would need, more details would be needed.


For running things like microwaves or ovens, most of us would probably say you would need 400ah of AGM batteries or at least 200ah of lithium batteries, plus all the hardware to charge and control them, with a big inverter.


This is why the older vans needed generators to run high load items as they never had enough battery power.
booster is offline   Reply With Quote
Old 07-04-2022, 02:10 PM   #4
Platinum Member
 
Join Date: Nov 2009
Posts: 190
Default

Well, you're both right. I didn't give enough information.

I have a 1997 Roadtrek Popular. it currently has 1 750 amp house battery.

I would be putting the oven on the pull out shelf where the TV used to be and plugging it in when needed.

I was given a small solar generator I think I could hook up and use, but I have to find out how.

With that information, what would your advice be?
soohma is offline   Reply With Quote
Old 07-04-2022, 02:30 PM   #5
Platinum Member
 
folivier's Avatar
 
Join Date: Dec 2021
Location: Louisiana and Colorado
Posts: 104
Default

I think you're confusing cca of 750 amps with amp hours. Not the same thing, cca are cold cranking amps and typically refer to the power available to start an engine. Amp hours are the amps that can be delivered over a period of time.
Your battery you refer to is probably 100 amphours or less. You also need an inverter large enough that supplies 120 volts AC to power your convection oven. Your convection oven probably uses 1500 watts or more/hour.
Clear as mud?
__________________
Enjoying life at our Colorado cabin
2011 Roadtrek C210P
RZR 570, Ranger 1000
Previously: 1999 36' Foretravel, 1998 Newell, 1993 Newell
folivier is offline   Reply With Quote
Old 07-04-2022, 03:09 PM   #6
Platinum Member
 
Join Date: Nov 2014
Location: PHX, AZ
Posts: 2,308
Default

Quote:
Originally Posted by soohma View Post
it currently has 1 750 amp house battery.

I would be putting the oven on the pull out shelf where the TV used to be and plugging it in when needed.

I was given a small solar generator I think I could hook up and use, but I have to find out how.





you do not have near electrical capacity on your van to run an oven.



(without a generator*)


...batteries and inverter would run you a couple of grand


and then you need a way to charge the batteries



run your dodge motor ?


carry a bunch of solar panels ?
( a "solar generator" is a marketing term which is misleading...many of these "generators" are batteries )





* most of our generators are the Onan 2800 rated for maximum "2800" watts at 120 volts.
that is at sea level and quickly drops at altitude .
at 5000' we are closer to 2200 watts max capacity
mkguitar is offline   Reply With Quote
Old 07-04-2022, 03:11 PM   #7
Platinum Member
 
Join Date: Nov 2009
Posts: 190
Default

Yes, clear as mud. My takeaway is that I can use the oven when plugged in, but not boon docking. Is that correct?

And yes, the solar is a battery with two panels.
soohma is offline   Reply With Quote
Old 07-04-2022, 03:31 PM   #8
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 10,687
Default

Quote:
Originally Posted by soohma View Post
Yes, clear as mud. My takeaway is that I can use the oven when plugged in, but not boon docking. Is that correct?

And yes, the solar is a battery with two panels.

Yes, that is the way it is, unless you have a generator.
booster is offline   Reply With Quote
Old 07-04-2022, 03:31 PM   #9
Platinum Member
 
Join Date: Nov 2014
Location: PHX, AZ
Posts: 2,308
Default

yes. when on shore power you can use your oven, microwave, air conditioner, blow dryer etc.


all the stuff which plugs into 120 volt power.


depending on the power at the campground or Pal's house you may only be able to use 1 at a time ( a house hold type 15 amp plug will allow about 1850 watts total, a 30 amp campground supply will allow double that load )




our old vans have limited energy capacity and are set up so the propane does all the heavy lifting... furnace, cooker, hot water- to try to do any of these with electricity is difficult


we have never used our genny camping.


we try to choose to go where we don't need AC and our microwave is used to store our plates and bowls


some of the newer vans have much more electrical capacity...they also may cost $200,000.... thousands of dollars in electrical capacity to park a black van in the sun and run the AC


mike
mkguitar is offline   Reply With Quote
Old 07-04-2022, 03:40 PM   #10
Platinum Member
 
Join Date: Nov 2009
Posts: 190
Default

Thank you all for your help. I have a much clearer idea of what to do now.
soohma is offline   Reply With Quote
Old 07-04-2022, 04:23 PM   #11
Bud
Platinum Member
 
Join Date: May 2016
Location: LA
Posts: 1,472
Default

Quote:
Originally Posted by soohma View Post
Thank you all for your help. I have a much clearer idea of what to do now.
Which is basically start over, maybe not quite. You may be able to keep the converter/charger.

You can run a microwave spending less than thousands of dollars as this is the only application that you have mentioned. Something like this at minimum:

3 inexpensive agm batteries for about $450 or more

1 inexpensive inverter for about $200 or more

cabling, fuses, etc.

You may have enough charging now, e.g. say you stop for lunch and just want to use the microwave.

Have fun sorting out the alternatives.
Bud is offline   Reply With Quote
Old 07-12-2022, 03:36 AM   #12
Platinum Member
 
Join Date: Mar 2018
Location: Tinley Park IL
Posts: 234
Default

I would be more concerned about the heat and a possible fire. There's a reason some Bs don't come with the convection oven/microwave. It needs to be vented properly.
ChicagoTom is offline   Reply With Quote
Old 07-18-2022, 10:58 PM   #13
Bronze Member
 
Join Date: Oct 2021
Location: CA
Posts: 35
Default

Or get a portable gas/propane inverter generator from Costco or Harbor Freight or one of the big box stores. We like Costco bc of its generous return policy if it clunks out too soon.

And put the portable generator on a cargo tray to the rear bumper hitch.

The inverter generators are pretty good. Lower noise. About 57 Dbs.
__________________

RVclassB4me 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. The time now is 06:43 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
×