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 > Your search for posts made by 'Itinerant1' found 103 matches.

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  Subject Author Date Posted Forum
RE: Easy Start By Micro Air

Yep, one’s own instincts often tend to default to a required 1 to 1 harvest to demand scenario, but in a broader real world context this is not necessarily the case… What also needs to be considered is compressor duty cycle, concurrent harvesting, and the restoration of full amperage to battery charging that occurs in between each compressor ON-OFF cycle, and the ‘available’ battery Depth of Discharge (DOD) till start of the next day’s harvest cycle…Where battery storage is tight (as in a truck camper - resolved by under dinette mounting), Lithium is what makes this become viable possibility,,, FWIW, total air conditioner run time (cycling - ending at 1915) was about 6.75 hrs… Hope this adds some enlightenment :) 3 tons Now add more solar and the #s really start to look good. Less from the batteries and a little charge on off cycles. ;)
Itinerant1 07/24/22 11:03am Tech Issues
RE: Easy Start By Micro Air

From other postings I've seen where people have tested running their A/C off batteries and they are reporting that you can get about 1 hr of run time for each 200aH of battery. I wonder how long it will be before RV manufacturers start offering an option of placing Lithium-Ion (or sodium) batteries in the generator bay, installing an inverter at least 2800W, wiring all the 110v outlets and appliances in the RV thru the inverter, and putting Soft Starts in the A/C. And with Lithium or sodium batteries, installing the second high-output alternator in the chassis in addition to as much solar as then can fit on the roof. While recently researching for my next RV I found one that I liked which I thought could be built this way quite easily to match my camping style. (I'm not looking to run the A/C on batteries other then when I'm traveling, hence the second alternator. Plus future battery technology may improve well beyond where it is now.) I figured I could replace the generator with about 1200aH of Lithium batteries (pricey, but doable). When I contacted the manufacturer with my requested changes, they flatly refused - said the generator couldn't be eliminated and they'd never wire the A/C and microwave thru the inverter. Reluctantly crossed them off my list and moved to other manufacturers. If you want to be able to boondock all year round and run at least one AC you will need that large battery bank 1200ah in lithium would cost you a bundle. Throw in 1500 watts of solar on the roof and some nice Victron electronics and you into a 25k+ solar system not counting labor. Now if I had a little piece of land somewhere where I could park when not traveling maybe the price would be worth it. I'll respectfully disagree. 500ah & 1,280w solar, I boondock fulltime with over 1,000 days in a consecutive stretch. I don't scimp on power, live like I'm pluged into the grid. ;)
Itinerant1 07/20/22 07:37pm Tech Issues
RE: Gray Tank Smell (Seriously annoying)

Excellent that you found the culprit. ;)
Itinerant1 07/17/22 11:45am Tech Issues
RE: Gray Tank Smell (Seriously annoying)

Do I understand there are no odors unless the A/C is running? If that is the case, I don't see any connection with the grey water. I would check the A/C. Maybe a dead critter in the unit. As mentioned the A/C does not pull any outside air so the offending item would be inside in the A/C or ductwork if there is any. The AC does not pull outside air but it does circulate interior air if the break or smell is present in the roof line or attic area it will drift into the AC duct system which is not 100% air tight. Once the smell enters the AC duct the AC system blows the foul air into the interior of the RV where it becomes a noticable bad smell. Why I mentioned to check vent pipes at roof line if everything else isn't curing the issue, can't hurt to check.
Itinerant1 07/15/22 09:44am Tech Issues
RE: Gray Tank Smell (Seriously annoying)

If your black or grey roof vent pipes coming from the holding tanks aren't tall enough to protrude through the roof into the vent covers you might be getting some smell in between the roof and ceiling. I had a stink occasionally and couldn't figure it out like you till I finally pulled the vents covers off, grey pipe was 1" shorter than the roof line. I added an adapter on problem solved.
Itinerant1 07/14/22 10:43am Tech Issues
RE: More on LFP Charging

Actually 7.9 kwh is one of the better days. Longer daylight hours and sun shining the more power I can purposely use (waste) in the way of the air conditioner. As you know being a veteran to solar... late spring, summer, early fall really isn’t a challenge for off grid living with solar/ batteries. Winter with shorter days, low sun arc and flat mounted panels can be a little more challenging but nothing that a generator can't handle with a 1 or 2 hours run for a hold over charge (20-40% SOC boost) using the lfp batteries in a partial SOC for long periods. 175-225ah is a normal daily use anything over that is air conditioner running, fridge turned over to electric instead of propane, just using any excess power that solar is producing because it's there. :)
Itinerant1 07/11/22 12:54pm Tech Issues
RE: More on LFP Charging

I believe because the industry is still stuck in dead lead thinking and why not the vast majority of rvs still believe in killing the lead batteries and go buy cheap replacements. Nothing wrong with that because it fits their needs and wallet. I think once you enter into larger battery bank and want to power high draw items you can't beat a programmable inverter/ charger. Yes it cost a little more but the user has entered into a higher cost battery that could be a truely set it and forget system if that fits their wants. Some folks like to tinker with the system. With my system which has been powered on for 2,279 days (inverter/ charger never been turned off), 2,095 days have been boondocking. The 184 days that were hooked up to a power pole I would turn off the 120v charger but leaver the loadshare set to 15a, 30a or 50a depending on incoming ac power and let the 12v loads be powered from the batteries, solar would top off batteries and float at 13.6v while the 120v is passing through to power the rig. Doing it this way if the rv park did lose power I still have full batteries and I go on enjoying the convenience of everything in the trailer uninterrupted. Which has happened a couple times, once the rv park owners came around and apologized for the power lose but we didn't even know it till I looked at the displays. Nice having choices.
Itinerant1 07/11/22 09:24am Tech Issues
RE: More on LFP Charging

Itinerant1, How do you manage on less than 2304 watt-hours per day? Are the panels actively running the RV during daylight hours? Do you know the total electrical use per day? I don't know now what you mean by how do I manage on less than 2304wh, 175ah +/- daily? Batteries Yes, solar is always running loads during the day and the balance of power charging the batteries if needed. Do you mean electrical use per daylike this? https://i.imgur.com/yMuljaJl.jpg https://i.imgur.com/JVYRcoVl.jpg
Itinerant1 07/09/22 01:20pm Tech Issues
RE: More on LFP Charging

Pick your posion for setting and move on with other daily activities, let it do its thing quietly in the back ground. Just have to have confidence in the equipment...if you don't you might need better equipment. ;)
Itinerant1 07/09/22 10:34am Tech Issues
RE: More on LFP Charging

Years ago I use to use 14.2v absorb and 13.6v "float". For the past 3 or so years just been using 14.1v absorb and 13.6v "float". 14.1v is the lowest I'll go fo the reason my SOC will reset the capacity to 100% whenever the pack voltage reaches 3.49 to 3.52 V per cell on average. Packs performing just fine. Depending on batteries/ cells and what bms it has might dictate what voltage is needed for balancing of cells and resetting soc capacity. If someone wants to use full capacity of the batteries or just partial it won't make a difference as long as the cells stay in some sort of balance with a periodic recharge. Nothing better than individual choices, one size doesn't fit all.
Itinerant1 07/04/22 09:05pm Tech Issues
RE: More on LFP Charging

I have a 100a pass-thru charger and a PD 9245 - the highest combined amperage I ever witnessed is 82a (usually a bit lower as it tapers down), this feeding into 400a/h of LFP (cylindrical cells = air gaps), mfg’s ‘C’ rate is 1.0, but I can’t even get close…With just the lowly PD, I can’t hardly imagine exceeding most other mfg’s C rate… 3 tonsWould seem like a charger issue or the wiring is inadequate more than a battery limitation. I agree. I know if I had to combine my solar and Magnum charger it would max around 175a charging (with good sun) and have seen 165a when running the generator one time to see what it would do combined. Makes for some quick charging. ;) As far as charging I can feed the batteries 100a (.2c) my with the eu2200i till 98% SOC when absorbs kicks in for 6 minutes and tapers to 99% SOC. I mentioned this in previous post that I could just about put a stop watch to the minute for how long it takes to use the generator to charge batteries to full if need be.
Itinerant1 06/29/22 11:17am Tech Issues
RE: More on LFP Charging

Their info reads the same as others. It looks like they need 14.4 for 3hours to balance the cells with what ever their bms is inside.
Itinerant1 06/28/22 11:48am Tech Issues
RE: Converter voltage drop

My personal choice is a programmable inverter/ charger but my use is much different than most. If I was downsizing and was going to stay with a converter than it would be one that Time2roll suggested in the 3rd post of this thread. I do have one of those converters hanging in the front compartment just disconnected from the system.
Itinerant1 06/24/22 07:16pm Tech Issues
RE: Converter voltage drop

Hi Gdetrailer, I agree. Li are FUSSY. They can work well. I'll never own them as I camp in extreme cold. They're not that fussy, my last hookup to a power pole was Nov 3rd last year for a night when there wasn't a boondock spot. Just solar and an occasional hold over from the generator during spring. Can't be that fussy. ;) I should add that the longest stretch boondocking off of solar and hold over charge with generator and lfp was over 1,000 days. Not that fussy.
Itinerant1 06/24/22 06:02pm Tech Issues
RE: LiFePo4 voltage under load

Unless you're pulling a heavy load at a lower SOC the voltage sag isn't that big of a deal. Yesterday using the microwave and toaster the battery display showed 180a draw 12.96v (inverter display showing 12.7v), after both loads done 13.15v on battery display. I forget the exact SOC but somewhere around 65%.
Itinerant1 06/02/22 08:50am Tech Issues
RE: Slow start system for air conditioner

"Lugging around 130# or more generator doesn't sound like fun." My 3500 watt Harbor Freight inverter/generator (which I rarely need or use) is always in the truck bed. Its heavy, but I only have to move it to the tailgate, so weight is not much of an issue. Your solar/ battery system is very similar to mine and in 6 years of continuous boondocking I have never felt anything larger than 2-2200w generator was needed, whether throwing a hold over charge or running the AC even at 7-8,000' elevation on a hot day. I suppose having the hydrid inverter/ charger has its advantages though. If a person had the large generator before hand and don't mind carrying it in the bed of the truck no reason to get rid of it. Having options for different camping....glamping needs makes roughing it easier. ;)
Itinerant1 05/31/22 12:54pm Tech Issues
RE: Slow start system for air conditioner

If the AC is running for cooling the trailer aren't you in it and most likely have other things on (tv, radio)? So how loud is the 2000w or 2200w generator? Where is it placed under your chair window? I know when my 2000 or 2200w generator is running for long periods with the air conditioning I don’t hear it inside but then I'll connect a second 30a cord to my 50a which will put the generator 25' away with the exhaust blowing away from the 5th wheel. Lugging around 130# or more generator doesn't sound like fun.
Itinerant1 05/31/22 08:32am Tech Issues
RE: Lifepo4 float setting?

That's because I'm living off my system and don't have the time to be a weekend worrior scientist making graphs, there is recorded data that time after time shows the same thing after 6 years of everyday use and many cycles in whatever SOC using high draw item for long periods. It works what I'm doing. I find these threads amusing when everyone is bringing in different beliefs from different websites or blogs or sales page's. I know one thing for sure, right or wrong, which I believe is good enough for "my" prupose of living off of solar/ lfp batteries with solar being the main charging source. 14.1v absorb 10 minutes tops but 6 minutes is usally when it switches to flaot at 13.6v. I have constant draws of 2ah from inverter (never turned off) and a humidifier 7ah on 24/7, total of 9ah always drawing then add in all the other comforts of life. I don’t scimp on power, some might even say wasteful but it's there to waste without worry. ;)
Itinerant1 05/14/22 11:02am Tech Issues
RE: Lifepo4 float setting?

StirCrazy if your claim is that the Solacity guy's info is just a sales pitch with wrong info about LFPs, it is your job to provide links to the correct, more credible, version of that information to prove your claim. FWIW, I don't read it as a sales pitch, and I am one who got all kinds of abuse from you LFP guys on here last year or so for my complaints about LFP sales pitches having bogus info. I am still getting abuse from 3-tons. :) Meanwhile he just used the Solacity guy as a reference in a recent post in this thread (13 May at 0732), and then when after that, I used the Solacity guy as a ref, he said that guy is not to be believed! Makes you laugh. When I posted test results of my various field tests of various RV equipments to show what they did, I had to explain how I measured things to indicate how credible those results were. It is no good making arm- wavy claims about LFP performance without any graphs , tables, and especially the whole scenario for how those measurements were made. EG, if I had LFPs I would already have run some cycles and made graphs to see what really happens at various charging rates same as I did years ago to make my ugly graph using FLAs. Barre's book on 12v taught me how to do that. So let's see some graphs and tables you LFP guys have made from your measurements and indicate how you got those numbers so they can be peer reviewed here by guys who can see if your results are credible. itinerant1 has posted many tables of how his system performs, but they don't show graphs of charging profiles at various rates with times, which the Solacity guy claims to have seen but did not show.
Itinerant1 05/14/22 10:46am Tech Issues
RE: Lifepo4 float setting?

Nothing like living on grid while off grid. ;) Agreed, kinda makes my ‘carry along’ Honda 2200i a pricy paperweight …lol 3 tons LOL. Yeah, we bought a 3500 watt Harbor Freight inverter/generator. So far, it has been run 10 minutes (just to make sure it didn't need to be returned). With your lfp size and solar the generator will probably be stored for long stretches.
Itinerant1 05/12/22 04:48pm Tech Issues
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