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05-07-2016, 06:12 PM
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#1
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3 Rivet Member
2017 Interstate Lounge Ext
Jacksonville
, Jacksonville, Fla, Sautee, Ga, Boca Grande, Fl, Breckenridge, Co
Join Date: Jun 2015
Posts: 136
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When was the 50 watt solar panel upgraded to 100 W
We have a 214.5 model AI. Not sure which solar panel we have. Either way, it has not been an issue for us as we don't usually park without shore power. We have boondocked for three days without a problem by using the gen set twice a day for a couple of hours, and the unit is stored plugged in. Just curious as to when the solar upgrade was made.
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05-07-2016, 06:55 PM
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#2
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Rivet Master
2014 27' FB Eddie Bauer
Chelsea
, Michigan
Join Date: May 2010
Posts: 1,792
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If you need to use the genset twice per day for a couple of hours when you boondock then something is not working properly with your solar setup. I'd check with your dealer or find a qualified RV solar person to look at your setup.
__________________
Bob Martel
WBCCI# 5766
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05-07-2016, 07:24 PM
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#3
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Rivet Master
2014 Interstate Ext. Coach
Sedona
, Arizona
Join Date: Jul 2008
Posts: 1,084
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When was the 50 watt solar panel upgraded to 100 W
On a sunny day under full sun, a 50 watt panel should give you up to 3 amps as displayed on the solar display. A100 watt panel will give you maybe 5 amps.
Sent from my iPhone using Airstream Forums
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05-07-2016, 08:04 PM
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#4
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Rivet Master
2013 Interstate Coach
Townsend
, Tennessee
Join Date: Nov 2013
Posts: 749
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In my part of the country, E Tenn, my 50 watt panel max'd out at 2.6amps. I replaced it a 100 watt panel that hits 5.6 amps. No battery issues in storage yet.....except that the shunt controller it came with (Atkinson) makes the battery drain down before it will kick in to charge. Not a problem if I have several days of sun, but if I get a string of rainy days it will struggle. In process of adding a new controller and 2 more panels......and changing batteries.
__________________
FMCA # 436814
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05-07-2016, 08:30 PM
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#5
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Rivet Master
2014 Interstate Ext. Coach
Sedona
, Arizona
Join Date: Jul 2008
Posts: 1,084
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Quote:
Originally Posted by toskeysam
In my part of the country, E Tenn, my 50 watt panel max'd out at 2.6amps. I replaced it a 100 watt panel that hits 5.6 amps. No battery issues in storage yet.....except that the shunt controller it came with (Atkinson) makes the battery drain down before it will kick in to charge. Not a problem if I have several days of sun, but if I get a string of rainy days it will struggle. In process of adding a new controller and 2 more panels......and changing batteries.
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The standard controller is designed to kick in at 12.3 volts or thereabouts, and this shows on the display as 80%. I suspect they may all have this behaviour.
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05-07-2016, 09:09 PM
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#6
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Rivet Master
2015 Interstate Ext. Coach
San Diego
, California
Join Date: Feb 2014
Posts: 666
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Busb2 you have the 50W solar panel. 2015 was the 1st for 100W.
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05-07-2016, 09:38 PM
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#7
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Figment of My Imagination
2012 Interstate Coach
From All Over
, More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,868
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Quote:
Originally Posted by AnnArborBob
If you need to use the genset twice per day for a couple of hours when you boondock then something is not working properly with your solar setup. I'd check with your dealer or find a qualified RV solar person to look at your setup.
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Actually, that's about typical for a stock Airstream Interstate that hasn't received an aftermarket solar upgrade.
Airstream Interstates have a lot of energy hogs on board that will suck down the house batteries. MILATV (I think, but my memory might be faulty) did an empirical study of his usage while boondocking, and determined that his batteries would run down to a 50% charge state in about 18 hours while boondocking, not even a full day. The newer the Interstate, the more energy-using appliances are installed, and the shorter the time between recharges because the stock house battery bank is always two Group 24 batteries.
The two Group 24 house batteries only have a total 160 to 170 amp-hours, of which you can use 80-85 before hitting 50% discharge.
A stock 50w or 100w solar panel on an Interstate is not adequate to the task of replacing 80 amp-hours a day, so it's inevitable that you'd have to run the generator at least once a day.
And since the generator is electric-start and requires the house batteries retain enough power (cold cranking amps) to even start the generator, running the generator twice a day is actually a wise move, in my opinion. It ensures that the batteries never get too low to start the generator; which would end your boondocking trip entirely.
__________________
I thought getting old would take longer!
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05-08-2016, 07:20 AM
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#8
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Rivet Master
2014 27' FB Eddie Bauer
Chelsea
, Michigan
Join Date: May 2010
Posts: 1,792
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Quote:
Originally Posted by Protagonist
Actually, that's about typical for a stock Airstream Interstate that hasn't received an aftermarket solar upgrade.
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Protagonist, that's pretty pathetic! What you've got is basically a trickle charger to top off the batteries while in storage.
I guess I'm spoiled with 540 watts on our roof (soon to be 740.) We hit 35 amps-in all the time (note I have a TT with a bit more real estate on the roof than have the Interstates.)
__________________
Bob Martel
WBCCI# 5766
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05-08-2016, 07:28 AM
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#9
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Figment of My Imagination
2012 Interstate Coach
From All Over
, More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,868
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Quote:
Originally Posted by AnnArborBob
Protagonist, that's pretty pathetic! What you've got is basically a trickle charger to top off the batteries while in storage.
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Exactly! And when I bought mine, that's really all I expected from the solar panel. But I didn't buy my Interstate for boondocking, and the lack of adequate solar capacity for boondocking didn't bother me.
__________________
I thought getting old would take longer!
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05-08-2016, 08:49 AM
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#10
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Rivet Master
1979 24' Airstream Excella 24
Tipp City
, Ohio
Join Date: Feb 2012
Posts: 551
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AnnArborBob, do you have any pics of your install? What brand and model panels did you use? I would like to install something similar. I am concerned that too many panels will look odd.
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05-08-2016, 08:59 AM
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#11
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Rivet Master
2013 Interstate Coach
Townsend
, Tennessee
Join Date: Nov 2013
Posts: 749
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To UKDUDE...the shunt controller will not take a battery to full charge. It reaches a set point and shuts down, whereas the PWM and MPPT controllers will not stop charging until the battery is full....as long as there is sun available. I am sure the LEWSTER can provide a more accurate and detailed response...he is the master in this subject.
__________________
FMCA # 436814
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05-08-2016, 09:10 AM
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#12
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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The Atkinson controller should go the way of the Parallax converters supplied in the trailers........ THE GARBAGE BIN!!!!!!
I simple swap out to a Morningstar 10 or 15 amp basic solar charge controller will greatly improve your system's performance and WILL provide for proper 3-stage battery charging.
It's really a no brainier!!!! You can even add Morningstar's remote monitor if you like.
Lew Farber
RVIA/RVDA Nationally Certified Master Tech
ABYC Certified Master Marine Electrician
Master Tech Energy Systems, Inc.
AM Solar Certified Installation Center*AMS Lithium Batteries
Lifeline AGM Batteries**Magnum Inverters***Victron Energy Components
541-490-6357
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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05-08-2016, 09:49 AM
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#13
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Rivet Master
2014 Interstate Ext. Coach
Sedona
, Arizona
Join Date: Jul 2008
Posts: 1,084
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Quote:
Originally Posted by toskeysam
To UKDUDE...the shunt controller will not take a battery to full charge. It reaches a set point and shuts down, whereas the PWM and MPPT controllers will not stop charging until the battery is full....as long as there is sun available. I am sure the LEWSTER can provide a more accurate and detailed response...he is the master in this subject.
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Yes, I fully agree with you and Lew that the Atkinson/Sunexplorer controller is less than perfect, but better than nothing for us boondockers. Mine will take the charge up to about 95% before shutting down which is definitely not optimal practice to maintain the batteries. A 3 stage controller is best.
Sent from my iPad using Airstream Forums
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05-08-2016, 12:27 PM
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#14
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Rivet Master
2014 27' FB Eddie Bauer
Chelsea
, Michigan
Join Date: May 2010
Posts: 1,792
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Quote:
Originally Posted by Gregsch
AnnArborBob, do you have any pics of your install? What brand and model panels did you use? I would like to install something similar. I am concerned that too many panels will look odd.
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Here are two pictures of our current installation. We will be getting two additional panels in another week or so. They are Grape Solar panels provided by AM Solar. (BTW, these were installed by LEWSTER.)
__________________
Bob Martel
WBCCI# 5766
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05-08-2016, 12:46 PM
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#15
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2 Rivet Member
2015 Interstate Coach
MEDFORD
, New Jersey
Join Date: Feb 2016
Posts: 79
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Battery Drain Source
Ive noticed that my rear TV , plugged into receptacle just above TV, remains powered up, red light on bottom of tv is lit, even with the main battery switch off.. I have to unplug when not using. Everything is off, including engine..Could this be a drain on battery, also is this normal?? May be something to check for battery drain..
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05-08-2016, 12:49 PM
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#16
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Figment of My Imagination
2012 Interstate Coach
From All Over
, More Than Anywhere Else
Join Date: Dec 2011
Posts: 10,868
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Quote:
Originally Posted by RICKBETTY
Ive noticed that my rear TV , plugged into receptacle just above TV, remains powered up, red light on bottom of tv is lit, even with the main battery switch off.. I have to unplug when not using. Everything is off, including engine..Could this be a drain on battery, also is this normal?? May be something to check for battery drain..
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On many Airstreams, the inverter is wired in parallel to the main disconnect, meaning the disconnect does not shut off the inverter. The inverter would need to be shut off separately.
Or you could switch off the breakers. But since the inverter also draws some power even when no circuits are energized, shutting off the inverter is better.
A television that has a wireless remote must draw some power even when turned off, otherwise the remote wouldn't work to turn on the television. So yes, it would be a parasitic drain.
__________________
I thought getting old would take longer!
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05-08-2016, 01:46 PM
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#17
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4 Rivet Member
2016 Interstate Grand Tour Ext
Houston
, Texas
Join Date: Oct 2015
Posts: 333
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Quote:
Originally Posted by RICKBETTY
Ive noticed that my rear TV , plugged into receptacle just above TV, remains powered up, red light on bottom of tv is lit, even with the main battery switch off.. I have to unplug when not using. Everything is off, including engine..Could this be a drain on battery, also is this normal?? May be something to check for battery drain..
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From the Magnum RC panel, press and hold the on/off button. It will turn off the inverter and the TV will be powered down. This removes a significant parasitic power draw. The inverter will still be consuming. ~400 mA when off.
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05-08-2016, 08:43 PM
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#18
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4 Rivet Member
2016 Interstate Grand Tour Ext
Houston
, Texas
Join Date: Oct 2015
Posts: 333
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Quote:
Originally Posted by Gregsch
AnnArborBob, do you have any pics of your install? What brand and model panels did you use? I would like to install something similar. I am concerned that too many panels will look odd.
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http://www.airforums.com/forums/f240...ur-136062.html
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05-09-2016, 03:59 PM
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#19
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Tampatomgirl
1990 34' Excella
Zephyrhills
, Florida
Join Date: Apr 2016
Posts: 102
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I would like to install solar panels on my 34'. Can anyone tell me how many it would require to be fully operational with two rooftop A/Cs? I'm not interested in pro installation. I can do it myself. Just having trouble figuring out all the calculations on the websites. Can't be that complicated. I have roughly 225 sq ft of interior space & all the usual appliances. Any help would be appreciated 🌺
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05-09-2016, 04:40 PM
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#20
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Rivet Master
2014 27' FB Eddie Bauer
Chelsea
, Michigan
Join Date: May 2010
Posts: 1,792
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Quote:
Originally Posted by Tampatomgirl
I would like to install solar panels on my 34'. Can anyone tell me how many it would require to be fully operational with two rooftop A/Cs? I'm not interested in pro installation. I can do it myself. Just having trouble figuring out all the calculations on the websites. Can't be that complicated. I have roughly 225 sq ft of interior space & all the usual appliances. Any help would be appreciated 🌺
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Your question is a bit off the topic of this post so you may want to start your own post and re-ask this question. But to cut to the chase, if you intend to run your two AC's off the solar panels, forget it. There isn't enough room on your roof for the amount of solar panels you would need.
__________________
Bob Martel
WBCCI# 5766
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