Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-10-2013, 07:42 PM   #15
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
SECRET SPY UPDATE!!!!!

Actually, Magnum is very close to releasing their solar charge controllers. I was just at the factory and saw several in beta testing. That's all I can say (under penalty of bamboo under the finger nails :-) )

They should be available in 30-60 days.

I'll update the Forum when I get the official word.
__________________

__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 09-10-2013, 08:56 PM   #16
3 Rivet Member
 
matthorr's Avatar
 
2012 25' FB International
Annapolis , Maryland
Join Date: Jan 2013
Posts: 116
This sounds like a great way to help prevent the AC tripping the circuit breaker on the power pole or over loading the generator. We have a pair of dogs and a few hundred dollars of insurance is worth it to give us some peace of mind that we can leave them in the trailer with the AC running in summer.

We also leave the roof vents open and fans on as a back up. This is a bit off topic, but has anyone found a good temperature alarm that could notify our smartphone if the temp gets too high in the trailer?
__________________

__________________
matthorr is offline   Reply With Quote
Old 09-10-2013, 09:31 PM   #17
4 Rivet Member
 
CA_Tallguy's Avatar
 
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 494
Unfortunately, it's not just a few hundred bucks for the device... They are about $2000 plus most will probably add the remote control panel and maybe some other add ons. I think it is more like $3000 when you add it all up with tax and/or shipping. And then there is the installation still left and supplies for that. (This would become a pretty core part of the trailer electrical system and some rewiring most likely will be needed.) Finally, a unit like this really should sit on a pretty good size battery bank so some people may be looking at putting money there too.

I am dreaming about installing a unit like this along with an on-board cummins propane generator. I think the project would set me back $6000 to $7000, maybe even more.
__________________
WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 09-10-2013, 10:03 PM   #18
4 Rivet Member
 
CA_Tallguy's Avatar
 
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 494
Quote:
Originally Posted by lewster View Post
SECRET SPY UPDATE!!!!!

Actually, Magnum is very close to releasing their solar charge controllers. I was just at the factory and saw several in beta testing. That's all I can say (under penalty of bamboo under the finger nails :-) )

They should be available in 30-60 days.

I'll update the Forum when I get the official word.
Interesting news! Thanks for the info.

I used to think that the high end solar MPPT controllers were expensive but in relation to this inverter/charger they are cheap! If I go forward with one, I will likely sell my newish outback and get one from the same company.
__________________
WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 09-10-2013, 10:16 PM   #19
3 Rivet Member
 
matthorr's Avatar
 
2012 25' FB International
Annapolis , Maryland
Join Date: Jan 2013
Posts: 116
Quote:
Originally Posted by CA_Tallguy View Post
Unfortunately, it's not just a few hundred bucks for the device... They are about $2000 plus most will probably add the remote control panel and maybe some other add ons. I think it is more like $3000 when you add it all up with tax and/or shipping. And then there is the installation still left and supplies for that. (This would become a pretty core part of the trailer electrical system and some rewiring most likely will be needed.) Finally, a unit like this really should sit on a pretty good size battery bank so some people may be looking at putting money there too.

I am dreaming about installing a unit like this along with an on-board cummins propane generator. I think the project would set me back $6000 to $7000, maybe even more.
What I was thinking when I wrote was a few hundred more than a non-hybrid inverter/charger. I eventually want to install solar, but am thinkin about doing it in pieces. Inverter first, then batteries, then solar.

I think I could handle the inverter myself. The solar might be too big of a project for me to bite off. Looking at the manuals, it looks like more or less replacing the current converter and then wiring in the accessories. I have a newer trailer (2012) so I don't think any major electrical work would be needed. Assuming it will fit in the same space...

I like that the magnums just connect to the existing AC circuits and don't use separate outlets like the $800 factory option (that I don't have).
__________________
matthorr is offline   Reply With Quote
Old 09-11-2013, 12:27 AM   #20
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Actually, adding a large inverter/ charger for both AC and DC use does require quite a bit of re-wiring. The smallest wire I use for battery to inverter runs is 2/0 with 4/0 for runs over 5'. They also need the proper size of Class T fuse and fuse block.

Then you need to run an ' in loop' and and an 'out loop' to and from the inverter for 120VAC, plus a couple of 30 amp breakers. Not to mention the re- wire of the existing breaker box's 30 amp 120 VAC input, all 10/3 cabling minimum, depending on the length of the wire runs.

Nothing really difficult, but you surely need to know what is going where of you will have one mess on your hands !
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 09-11-2013, 01:38 AM   #21
4 Rivet Member
 
CA_Tallguy's Avatar
 
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 494
Yes, I agree with lewster. There is a lot to wire and strategy and goals to consider since a unit like this ties together the AC and DC systems quite a bit. As lewster says, most people don't want to hook up all their AC power outlets and devices to an inverter and the battery bank so they can make sure there are not any extra drains on the system than necessary when you are trying to conserve power. But these booster units contemplate running things like the air conditioner through it when normally that would be split aside to only have power when shore or generator power is available. Breaking out a sub panel might be all that is needed but I'm not sure.

I have not thought through all these issues yet and it may be a bit hard for me to fully figure out as I am so DC power focused right now. I have solar and I don't use a generator. As I said previously, I almost never use my charger/converter as the solar handles my DC needs pretty well even while I have access to shore power.

I've browsed the manuals for these similar boosting charger/inverter units and they do have some features to try to keep the draw down, such as "search" mode where it pulses current looking for a load. I think a setting can make it so things like microwave clocks and such don't trigger the inverter. But the search mode itself consumes about 7 watts which I think is more than half an amp at 12 volts. That's a big chunk of power out of my solar! (I get around 7 to 12 amps during daylight hours.) So I am pretty sure that I wouldn't want that search mode running all the time so I would need to make sure I could turn that off and on at will. Or that I could unplug the whole unit when I want and not lose settings and such.

I've got 100 questions like that that I need to explore before going for something like these units.

I would also be getting a generator if I do go down this road as my goal would be to have more AC current luxury while on the road. But at the same time, I have the solar and I want to make sure that it gets MORE usage with a charger/inverter system and generator, not less. My gut is telling me that they may take precedence over solar unless the system is thought out carefully.
__________________
WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 09-11-2013, 08:03 AM   #22
LFC
4 Rivet Member
 
Vintage Kin Owner
Memphis , Tennessee
Join Date: Jun 2013
Posts: 260
When camping....If you have a generator to plug your shore line into whats the need for an inverter ?


And what good is an inverter without a generator ?

na da
__________________
LFC is offline   Reply With Quote
Old 09-11-2013, 09:52 AM   #23
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Quote:
Originally Posted by LFC View Post
When camping....If you have a generator to plug your shore line into whats the need for an inverter ?


And what good is an inverter without a generator ?

na da
Inverters take the place of a generator for many 120VAC loads and can all but eliminate the need for a generator for just about everything but the roof A/C unit. You don't need a generator to have an inverter, but you surely need an appropriately sized solar array and battery bank to satisfy your energy demands.

Don't confuse and inverter/charger with a converter/charger. Both units need shore power (or generator power) to use the charging sections to keep your batteries charged.

A converter will create 12VDC from shore power to charge your batteries and power your trailer's 12VDC loads.

An inverter/charger will also provide for charging your batteries from shore power, but it is wired into your 120VAC distribution system to use your 12VDC battery power when off-grid to supply selected 120VAC outlets in the trailer with a specified amount of 120VAC house current. No generator required to do this last feature. It actually replaced the generator, but like I stated above, you then need a solar charging system to keep your batteries full.

WHY? Some folks don't like generators and don't need A/C, so they install solar and inverters to provide for their 120VAC needs when off-grid.......things like a microwave, TV watching and charging of electronic devices.

CA_Tallguy, You can turn a Magnum inverter totally off so there are no parasitic loads by either using the on/off button and setting the load search to 'off' in the ME-RC remote, or setting the search high enough so the inverter does not search for loads below a certain threshold.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 09-11-2013, 02:07 PM   #24
LFC
4 Rivet Member
 
Vintage Kin Owner
Memphis , Tennessee
Join Date: Jun 2013
Posts: 260
A 12 volt system without a constant charge is not going to last very long when trying to convert 12 volts to 110 volts out of a car sized battery....what 5 minutes ?

An inverter in a camping trailer without the use of a generator is about like teats on a boar hog....

but a generator with a camping trailer plugged into it iz like teats on a sow hog....
__________________
LFC is offline   Reply With Quote
Old 09-11-2013, 02:16 PM   #25
Rivet Master
 
Skater's Avatar
 
1995 30' Excella
Bowie , Maryland
Join Date: Apr 2005
Posts: 2,344
Quote:
Originally Posted by LFC View Post
A 12 volt system without a constant charge is not going to last very long when trying to convert 12 volts to 110 volts.
That depends on what you're running off of it and for how long, and what kind of battery capacity you have. If you're not interested in a topic, you don't have to post about it to explain your disinterest.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel

Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
Skater is offline   Reply With Quote
Old 09-11-2013, 02:26 PM   #26
Moderator
 
DKB_SATX's Avatar

 
2017 26' Flying Cloud
1976 Argosy 28
Alamo Heights , Texas
Join Date: Aug 2006
Posts: 6,401
Images: 1
Blog Entries: 7
Quote:
Originally Posted by LFC View Post
A 12 volt system without a constant charge is not going to last very long when trying to convert 12 volts to 110 volts out of a car sized battery....what 5 minutes ?

An inverter in a camping trailer without the use of a generator is about like teats on a boar hog....

but a generator with a camping trailer plugged into it iz like teats on a sow hog....
A decent-quality inverter's load on the battery depends on what it's powering. It's about watts and watt-hours, not volts.

I use a 600W inverter to power my CPAP when boondocking, because it was cheaper to buy a decent inverter than to buy a new CPAP with a 12v input. A group24 would run it for 10 hours or so, but I use an AGM so I can charge it inside. I don't have solar, so I do use a generator, but if I lived someplace with nicer weather than Texas in the summer, I'd have solar instead.

PS: The CPAP doesn't use anywhere near 600W, even with the humidifier running, that was just the best deal I found for efficiency vs. capacity vs. price.
__________________
— David

Zero Gravitas — 2017 Flying Cloud 26U | Il Progetto — 1976 Argosy 28 Center Bath | WBCCI# 15566

He has all of the virtues I dislike and none of the vices I admire. — Sir Winston Churchill
DKB_SATX is offline   Reply With Quote
Old 09-11-2013, 02:59 PM   #27
4 Rivet Member
 
CA_Tallguy's Avatar
 
1977 31' Excella 500
Zavalla , Texas
Join Date: Jul 2012
Posts: 494
The main reason we are discussing these particular inverters is that they can BOOST current from a generator so you can use a smaller one to start and run an air conditioner. For this purpose, these inverters are only supplying big power for a few seconds during starting. Then, after running, the used power from the batteries is replenished from the generator or another source. We're not talking about running an AC off of batteries for long periods of time.
__________________
WBCCI #1711
Texas Gulf Coast Unit, Texas Airstream Harbor
Angelina National Forest, Zavalla, TX
CA_Tallguy is offline   Reply With Quote
Old 09-11-2013, 08:14 PM   #28
LFC
4 Rivet Member
 
Vintage Kin Owner
Memphis , Tennessee
Join Date: Jun 2013
Posts: 260
Quote:
Originally Posted by Skater View Post
That depends on what you're running off of it and for how long, and what kind of battery capacity you have. If you're not interested in a topic, you don't have to post about it to explain your disinterest.
The reason I posted was to hopefully save someone from wasting their money....the last truck I had came with a power inverter it would hardly run a skill saw with the engine running......and would do nothing without the engine running.

Trying to get 110 volts out of 12 volt car batteries is senseless.
__________________

__________________
LFC is offline   Reply With Quote
Reply


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



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:03 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.