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 08-06-2017, 09:54 PM   #541
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 12,414
Default

Quote:
Originally Posted by WingedRyno View Post
That would be an interesting test. Turn off the fridge and cover the solar and time it. Should give a pretty good idea of BMS draw.

When I have more time I'll try to find a carport or garage and time it.
You may have a fuse for the solar controllers and/or the panels that would make it easier.
booster is online now   Reply With Quote
Old 08-06-2017, 10:15 PM   #542
Platinum Member
 
GeorgeRa's Avatar
 
Join Date: Feb 2016
Location: Portland, Oregon
Posts: 3,285
Default

Quote:
Originally Posted by booster View Post
The whole "how much power do I have left" gets pretty complicated for an Ecotrek, kind of like having "reverse Peukert" on steroids .
“"reverse Peukert" on steroids” – Mr. Peukert is rolling in his grave.
It would be interesting to understand details about the parasitic loss, a $5 power relay? If shunt couldn’t be easily located in a place allowing to capture parasitic loss then a plan B fall is a voltage measurement.
Getting XXXX Ah Li batteries with XXX Ah parasitic losses makes the system practically even with lead acid, just a little more expensive.
GeorgeRa is online now   Reply With Quote
Old 08-06-2017, 11:19 PM   #543
Platinum Member
 
Join Date: Mar 2017
Location: WA
Posts: 202
Default

Quote:
Originally Posted by booster View Post
You may have a fuse for the solar controllers and/or the panels that would make it easier.
Good idea. Will hip pocket that one.
WingedRyno is offline   Reply With Quote
Old 08-06-2017, 11:25 PM   #544
Platinum Member
 
Join Date: Jul 2012
Posts: 2,380
Default

Wishing and hoping that RT adds something to give better SOC data has been going on for a long time and other than the possible reintroduction of Coach Connect it seems very unlikely that RT will provide a shunt based SOC measurement.

So, being stuck with voltage measurements as the only real alternative, I would just make the best of the situation and try to get the most accurate voltage measurement and maybe use a recording voltmeter to save a history. It won't take much data to get enough info to come up with some "good enough" indications of SOC vs Voltage for your specific system under your typical usage scenarios. Since the voltage does depend on both SOC and loads and the chargers, you are never going to get anything as accurate as a shunt based measurement but it will likely be good enough to provide a reasonable SOC estimate for purposes of managing the Ecotrek batteries (when you need to bring fresh ones online for instance) and when to start battery charging. I have two recording multimeters that come in handy for this type of data collection, a MooshiMeter and a Redfish, both of which can record voltage data and transfer it to your phone, tablet, or computer for analysis.

In terms of the Voltstart trigger voltage, the trigger seems to be set nowhere near 10-20% SOC but this doesn't really effect the performance of the system. The risk of setting the trigger voltage too low is that voltage drops from load spikes could trigger the Ecotreks to go offline or the inverter to shut down. There is less risk of this at higher trigger voltages. You get the same energy out of the system at a higher trigger voltage as long as you don't go too high and run the GU when the batteries are at full charge. In the end, you can get the total energy available in the batteries and the energy provided by the GU during the Voltstart cycles at trigger voltages well above the 10-20% SOC which is where most expect the trigger to be set. Again, if you set the trigger voltage too high then the GU will fully charge the batteries during the Voltstart cycle and you would waste the remainder of the GU runtime energy. Of course, the RT and salesmen talk at times about the Voltstart having the capability to keep you batteries fully charged during the Voltstart operation but that is a bunch of BS and would be counterproductive if it was designed to do that. You would need to trigger the Voltstart at very high SOC and likely lose a lot of available GU energy charging full batteries.
gregmchugh is offline   Reply With Quote
Old 08-07-2017, 02:39 AM   #545
BBQ
Platinum Member
 
Join Date: May 2016
Location: East
Posts: 2,483
Default

Quote:
Originally Posted by markopolo View Post
The Master Instruments chart shows 20% SoC being 13.08V whereas the chart WingedRyno is using shows 13.1V being 50% SoC.

12.44V on the Master Instruments chart indicates 5% SoC whereas the chart WingedRyno is using assumes 12.4V being 20% SoC.

It appears that the chart WingedRyno is using was someones best effort / best guess but likely not accurate.

Another clue as to the inaccuracy of the chart WingedRyno is using would be that it is unlikely that volstart kicks in at 44% SoC. It's more likely that it would trigger closer to 10% SoC than 44% SoC.

RT have reprogrammed their VoltStart 8 months ago.
They are triggering it much sooner,
way before the battery reached the death spiral.
__________________
BBQ is offline   Reply With Quote
Old 08-08-2017, 04:03 AM   #546
Platinum Member
 
Join Date: Mar 2017
Location: WA
Posts: 202
Default

I ran the AC today for about four hours of driving before pulling into a spot with shore power. It was 96 outside and the coach stayed about 86F by the fridge up front and about 79F by the couch with the air blasting on the couch.

Did much better than I expected based on my previous tests. I bought a laser temp gun and I'm going to have to do more testing before I feel solid about the results.

Of course I don't really know what the "standard" is for A/C performance in the Adventurous.
WingedRyno is offline   Reply With Quote
Old 08-08-2017, 04:10 AM   #547
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,668
Default

Quote:
Originally Posted by WingedRyno View Post
I ran the AC today for about four hours of driving before pulling into a spot with shore power. It was 96 outside and the coach stayed about 86F by the fridge up front and about 79F by the couch with the air blasting on the couch.

Did much better than I expected based on my previous tests. I bought a laser temp gun and I'm going to have to do more testing before I feel solid about the results.

Of course I don't really know what the "standard" is for A/C performance in the Adventurous.
What color is the coach?
cruising7388 is offline   Reply With Quote
Old 08-08-2017, 04:13 AM   #548
Platinum Member
 
Join Date: Mar 2017
Location: WA
Posts: 202
Default

Quote:
Originally Posted by cruising7388 View Post
What color is the coach?
Silver ice

WingedRyno is offline   Reply With Quote
Old 08-08-2017, 04:53 AM   #549
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,668
Default

Quote:
Originally Posted by WingedRyno View Post
Silver ice

That's an elegant color and IMO a lot better dealing with hot temps than the charcoal color I have. I wanted silver but was harassed into charcoal which always looks filthy even when its clean.
cruising7388 is offline   Reply With Quote
Old 08-08-2017, 05:06 AM   #550
Platinum Member
 
Join Date: Mar 2017
Location: WA
Posts: 202
Default

Quote:
Originally Posted by cruising7388 View Post
That's an elegant color and IMO a lot better dealing with hot temps than the charcoal color I have. I wanted silver but was harassed into charcoal which always looks filthy even when its clean.
It was actually the only color they had left for a quick build. We were gonna go with white to save money, but since all they had was silver ice we went with it. I prefer a darker color myself, but we didn't much care what it looked like.
WingedRyno is offline   Reply With Quote
Old 08-08-2017, 05:40 AM   #551
Platinum Member
 
Join Date: Nov 2015
Location: CA
Posts: 1,668
Default

Quote:
Originally Posted by WingedRyno View Post
It was actually the only color they had left for a quick build. We were gonna go with white to save money, but since all they had was silver ice we went with it. I prefer a darker color myself, but we didn't much care what it looked like.
You didn't do too badly. The silver surcharge on your CS is about 2k. The other CS colors run from about 5k to 8k. But color choices on the Simplicity and the Zion run only about 600 bucks.
cruising7388 is offline   Reply With Quote
Old 08-08-2017, 12:13 PM   #552
BBQ
Platinum Member
 
Join Date: May 2016
Location: East
Posts: 2,483
Default

Quote:
Originally Posted by WingedRyno View Post
I ran the AC today for about four hours of driving before pulling into a spot with shore power. It was 96 outside and the coach stayed about 86F by the fridge up front and about 79F by the couch with the air blasting on the couch.

Did much better than I expected based on my previous tests. I bought a laser temp gun and I'm going to have to do more testing before I feel solid about the results.

Of course I don't really know what the "standard" is for A/C performance in the Adventurous.
The first thing you must do is to point the laser at the intake and the output slots, you should see a 16~20 degrees temperature differential. You can check other areas for comfort, but that does not tell you if the A/C is working properly.

If you do not see the temperature range,
the next thing you can do is to check the voltage to the A/C. It should be at least 103v.

The next thing you can check is the ampere to the compressor. You will need a clamp-on meter to do that. The higher the outside temperature, the higher the electricity draw.
__________________
BBQ is offline   Reply With Quote
Old 08-08-2017, 12:38 PM   #553
Platinum Member
 
Join Date: Dec 2010
Posts: 2,058
Default

I have a suggestion-put the AC on and open the fantastic fan.aim open the air conditioner so it just blasts low. Perhaps the combo of these 2 things will enable the hot air to rise and escape thru the fantastic fan.
gerrym51 is offline   Reply With Quote
Old 08-08-2017, 01:29 PM   #554
Platinum Member
 
Phoebe3's Avatar
 
Join Date: May 2017
Location: California
Posts: 674
Default

I like the silver and it's probably the best color other than white for heat reflection.

Classy looking van.
__________________
2018 Coachmen Crossfit/Beyond
Phoebe3 is offline   Reply With Quote
Old 08-08-2017, 01:29 PM   #555
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 12,414
Default

I think you will find that a cooking or meat thermometer will work much better than an infrared thermometer for checking air temperatures, as the infrared can just take the temp of surfaces.

I would also make sure the van AC is on recirc or max AC setting (or whatever they call it) so you aren't bringing in a lot of air that needs to have the moisture taken out of it and requires more cooling to do so.
booster is online now   Reply With Quote
Old 08-08-2017, 01:37 PM   #556
Platinum Member
 
Join Date: Dec 2010
Posts: 2,058
Default

Quote:
Originally Posted by booster View Post
I think you will find that a cooking or meat thermometer will work much better than an infrared thermometer for checking air temperatures, as the infrared can just take the temp of surfaces.

I would also make sure the van AC is on recirc or max AC setting (or whatever they call it) so you aren't bringing in a lot of air that needs to have the moisture taken out of it and requires more cooling to do so.
Booster-i've never seen a control on mine that lets me re-circulate inside air-please enlighten me. I have the same AC as Wynged
gerrym51 is offline   Reply With Quote
Old 08-08-2017, 02:23 PM   #557
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 12,414
Default

Quote:
Originally Posted by gerrym51 View Post
Booster-i've never seen a control on mine that lets me re-circulate inside air-please enlighten me. I have the same AC as Wynged
We may be speaking of different AC units. I was referring to the van's dash AC unit, not the coach rooftop one, as WingedRyno had said he was driving. The dash air almost always will have a recirc function although it may be called something else. There used to be window and small AC units that had a "fresh air" setting that would bring in outside air, but I haven't seen on in a long time, and never in an RV that I recall.
booster is online now   Reply With Quote
Old 08-08-2017, 05:02 PM   #558
Platinum Member
 
Boxster1971's Avatar
 
Join Date: Mar 2012
Location: Maryland
Posts: 1,197
Default New to RVs and Hopeful Warp Core RoadTrekkers

Quote:
Originally Posted by booster View Post
We may be speaking of different AC units. I was referring to the van's dash AC unit, not the coach rooftop one, as WingedRyno had said he was driving. The dash air almost always will have a recirc function although it may be called something else. There used to be window and small AC units that had a "fresh air" setting that would bring in outside air, but I haven't seen on in a long time, and never in an RV that I recall.
Sprinters have an air-recirculation mode, but it will only stay on for max of 30 minutes. See attached page from owners manual for deatails.


- - Mike
2012 Sprinter 3500 Extended converted B-Van by Airstream
__________________
2024 Airstream Interstate 19
Boxster1971 is offline   Reply With Quote
Old 08-08-2017, 06:46 PM   #559
Platinum Member
 
Join Date: Aug 2010
Location: Minnesota
Posts: 12,414
Default

Quote:
Originally Posted by Boxster1971 View Post
Sprinters have an air-recirculation mode, but it will only stay on for max of 30 minutes. See attached page from owners manual for deatails.


- - Mike
2012 Sprinter 3500 Extended converted B-Van by Airstream
Now that is weird, IMO. We use ours on recirc almost all the time. It makes for less humidity and dust coming in and really reduces the duty cycle on the compressor.
booster is online now   Reply With Quote
Old 08-08-2017, 07:09 PM   #560
Bud
Platinum Member
 
Join Date: May 2016
Location: LA
Posts: 1,549
Default

"Now that is weird, IMO. We use ours on recirc almost all the time. It makes for less humidity and dust coming in and really reduces the duty cycle on the compressor."

I use recirculate in the New Orleans area, but Not when traveling in a dry climate as would have even a more bloody nose, dryness.

My 2013 Honda Accord recirculate or outside is automatic so I suppose it has a humidity sensor?

Bud
Bud is online now   Reply With Quote
Reply


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 10:11 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.