Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 06-19-2015, 10:06 AM   #15
Senior Member
 
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,885
Quote:
Originally Posted by oneroamer View Post
The battery's seem to be the weak point in the whole equation, but I see a day when a battery charge can last a week or more.
There are really a few problems (I do solar installs):
1) Solar isn't demand based. That is, it can be cloudy (no power) and you might need to heat something. Or it could be cloudy and hot/humid. In these cases you need to store that power or you won't have any.

2) Storing power is expensive. Batteries have finite life, generally require some maintenance, and are hazardous materials. Batteries are relatively low voltage and bringing them up to grid power levels requires a LOT of batteries or a lot of power draw.

3) Our grid isn't designed to work with solar. It's not a problem in the US, but it's becoming a problem in Europe where there is more solar power. Companies predict grid demand and buy/sell nationwide to keep their customers in power. Solar throws another variable into the mix.
__________________

__________________
cb1000rider is offline   Reply With Quote
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!

Old 06-19-2015, 10:37 AM   #16
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,072
Extremely interesting and well written "Real Life" evaluation of LFP pros and cons by a real user over 3.5 years.

Living the Lithium Lifestyle – 3.5 Year Lithium RV Battery Update | Technomadia
__________________

__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-19-2015, 10:44 AM   #17
Senior Member
 
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,885
I love lithium (LiPo) batteries for particular use cases. They're amazing batteries. Basically they putout massive amounts of power that doesn't decrease until they're almost fully discharged. This is in contrast to lead-based (or other) batteries that have a more linear decrease in power.

The technology in these batteries is what is powering all these drones (and other RC products) - basically made gas power unnecessary.

However, they have limited life (as mentioned in the article), they're not inexpensive, and more than that, they have a history of being a fire hazard much more than other battery types... I wouldn't use them in RV/residential unless they were incased in something fire-proof.
__________________
cb1000rider is offline   Reply With Quote
Old 06-19-2015, 12:03 PM   #18
Senior Member
 
Gordon Dewald's Avatar
 
Winnebago Owners Club
Join Date: Mar 2014
Posts: 10,167
Tesla has made some huge increases in battery power. I recall they recently announced a battery size for powering a house.
__________________
Gordon and Janet
Tour 42QD/inTech Stacker
Gordon Dewald is offline   Reply With Quote
Old 06-19-2015, 07:13 PM   #19
Senior Member
 
1ciderdog's Avatar


 
Join Date: Jun 2010
Posts: 4,325
I live off grid and have ten solar panels, 16 L-16 batteries and assorted control devices. There is no way I could mount those panels on my RV and/or carry the 16 L-16 batteries. We are very power conscious but do have to have a back up generator which does run occasionally even in sunny weather. I'm aware improvements are being made in solar and battery storage but like others have posted I doubt I'll see enough improvement in my or my kids life time to have sufficient solar to adequately power all appliances in an RV.
__________________
Bob, Sandi & Marmaduke the Big Pug
SW OREGON 2004 Journey 39K, 330 Cat
If towing: a 2006 Mini Cooper or 1995 Wrangler
1ciderdog is offline   Reply With Quote
Old 06-19-2015, 09:04 PM   #20
Junior Member
 
Join Date: Jun 2015
Posts: 17
Maybe the question really should be is there a way to make a powerful generator whisper quiet now?
__________________
oneroamer is offline   Reply With Quote
Old 06-19-2015, 09:08 PM   #21
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,713
Quote:
Originally Posted by oneroamer View Post
I'm wondering if this will be a trend because my favorite RV would be the Earth Romer, they live completely off the grid in our solar powered however they are quite costly and over $500,000 but I wonder is Earth Roamer starting A trend toward eliminating noisy generators and relying on solar power?
No, RV solar will not/cannot eliminate a generator today. For instance, last night it started raining and heavily overcast, this has continued all last night,all day today, will continue until at least daylight tomorrow.
It would require a large bank of lithium batteries to operate the RV for 36 hours without a recharge or feed to supplement the bank. Perhaps that Earth Roamer comes with a bank of $3,000 lithium batteries though, I don't know. This makes me curious, would a bank of lithium batteries run an air conditioner for 24 hrs without a recharge?(reference your desert concerns)
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 06-19-2015, 09:33 PM   #22
Senior Member
 
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,885
Quote:
Originally Posted by oneroamer View Post
Maybe the question really should be is there a way to make a powerful generator whisper quiet now?
There is. It's called Honda.

:-)
__________________
cb1000rider is offline   Reply With Quote
Old 06-19-2015, 09:40 PM   #23
Senior Member
 
Ford Super Duty Owner
Join Date: Apr 2012
Location: Austin, TX
Posts: 1,885
Quote:
Originally Posted by Ray,IN View Post
This makes me curious, would a bank of lithium batteries run an air conditioner for 24 hrs without a recharge?(reference your desert concerns)
To do that, 120V * 12 amps * 24 hours = 34560 watt/hours. Lets say you need to cover 120% of that (if lithium) = 41500 watt/hours (rounding up)

So sure, a bank of batteries can do it... Taking non-lithium, say lead acid-golf cart batteries, 6v, 300 amp/hours runs about $400. These are 1800 watt/hours. It wound require 23 of them, at a cost of $9200 + an adequate inverter. Lithium would cost more, but would have a smaller footprint.
__________________
cb1000rider is offline   Reply With Quote
Old 06-19-2015, 10:18 PM   #24
RVM99
 
bokobird's Avatar


 
Newmar Owners Club
Solo Rvers Club
Join Date: Feb 2014
Location: CT S&B
Posts: 2,894
Quote:
Originally Posted by cb1000rider View Post
There are really a few problems (I do solar installs):
1) Solar isn't demand based. That is, it can be cloudy (no power) and you might need to heat something. Or it could be cloudy and hot/humid. In these cases you need to store that power or you won't have any.
Quote:
Originally Posted by Ray,IN View Post
No, RV solar will not/cannot eliminate a generator today. For instance, last night it started raining and heavily overcast, this has continued all last night,all day today, will continue until at least daylight tomorrow.
It would require a large bank of lithium batteries to operate the RV for 36 hours without a recharge or feed to supplement the bank. Perhaps that Earth Roamer comes with a bank of $3,000 lithium batteries though, I don't know. This makes me curious, would a bank of lithium batteries run an air conditioner for 24 hrs without a recharge?(reference your desert concerns)
Not debating a lot of what's been stated but the statements above seem to imply that a cloudy day means no power. I don't understand that as I've got an array for my S&B (6.5kw) that on a cloudy day easily outputs 1kw throughout the daylight hours. Yes, it's a huge drop from normal sunny days (I'll see 5.5kw usually) yet it still offsets some utility usage. It's like thinking you can't get sunburn on a cloudy day.
__________________
Carl
'07 Newmar KSDP3916 w/Hydralift/'06 FLHX, '15 Equinox, Blue Ox Alpha, RVibrake2, FMCA F476758
With the birds...
bokobird is offline   Reply With Quote
Old 06-19-2015, 11:03 PM   #25
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,072
One of the things I have take from reading the article I cited is that I can get 400 AHs with nearly 320 usable in a smaller space than my current 440 AHs with only 220 usable. On top of that I can charge them faster thus less genny time. This is without even considering solar power. Since I can get an honest 7 hours going down to 60% SOC I could see over 10 hours with the additional AHs without building something a tad larger.

Now, this is intriguing but costs and some uncertainties won't drive me to the bank to make that swap. However, I wonder how much longer it will be before LFP batteries become an option.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 06-19-2015, 11:26 PM   #26
Junior Member
 
Join Date: May 2015
Posts: 23
Boondocking time limits

Moonrover:
Did you say you can camp barefoot for TWO WEEKS? I'm amazed! We can handle 4 days if we are conservative. But that is mostly because we run out of fresh water and gray water storage. In really cold weather, we've emptied our propane in two days, and the battery for the furnace fan went out too.
__________________
Skip and Suzy, travelling with Hope and Joy!
Transitioning from Hampton, VA to full-time RVers.
SuzyCothran is offline   Reply With Quote
Old 06-20-2015, 03:00 PM   #27
Senior Member
 
Moonrover's Avatar
 
Join Date: May 2013
Posts: 1,685
Quote:
Originally Posted by SuzyCothran View Post
Moonrover:

Did you say you can camp barefoot for TWO WEEKS? I'm amazed! We can handle 4 days if we are conservative. But that is mostly because we run out of fresh water and gray water storage. In really cold weather, we've emptied our propane in two days, and the battery for the furnace fan went out too.

It's a bus conversion with massive tanks. I designed all the systems myself with dry camping in mind.
__________________
Moonrover is offline   Reply With Quote
Old 06-20-2015, 03:17 PM   #28
Senior Member
 
Join Date: Sep 2013
Posts: 596
The only cooling technology that could be an RV substitute for compressors are evaporative coolers. They draw 1/20th of the power of a typical ac unit but it also consumes water. If you had an easy water source and 400-600W of solar along with 4 to 6 GC batteries, most RVs would be power independent.
__________________

__________________
marcham is offline   Reply With Quote
Reply

Tags
ace, generator, panel, replace, solar



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Solar Panels jdrakeaia Going Green 21 06-01-2015 09:52 AM
Should solar panels be covered when storing RV? PeaceOwl Going Green 8 12-20-2014 10:53 PM
Connecting multiple Solar Panels Azarius Going Green 5 10-21-2014 11:34 AM
Solar power of the future. Thought this might be of interest to the Solar power puris IMDSailor MH-General Discussions & Problems 1 04-17-2014 05:31 AM
Can Newmar Ventana come with solar panels umcontractor Newmar Owner's Forum 9 12-15-2013 07:27 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 04:02 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.