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 > Your search for posts made by 'Itinerant1' found 73 matches.

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RE: Effect of no absorption on LiFePo4?

And we all gotta go through a little experience with something new before learning or knowing what to expect and how to deal with or maintain it. My response above is for the RV power “experts” if you will, who can’t seem to not go down rabbit holes. Kindly sensing your frustration, consider (in the interest of a somewhat wider info-seeking audience…) that one man’s rabbit hole might very well be another man’s ‘go to’… Admittedly, I sometimes provide the ugly details, but mostly to help dampen the ‘recurring, made-up’ LFP mis-information from growing recurring legs (as has happened on LFP ad nauseam - a seasoned pattern of nuisance thread misdirects by interlopers) JMHO… 3 tons - Guilty as Charged There have been many times in these LFP threads that I start to write a respone then delete it. You seem to handle the misinfo well that gets posted. It just seems even with so much real life experience of almost 7 years living off of LFP/ solar and over 2,200+ partial cycles of 35-45% DOD equalling 175-225ah daily from a 500ah battery bank so many new folks or non user know more. More power to them. I'll stick to what's been working. ;)
Itinerant1 01/27/23 06:40am Tech Issues
RE: solar awning

I think solar awning is not quite correct. The web site pictures do not suggest that the panels are flexible. https://xponentpower.com/wp-content/uploads/2021/10/Page-8-Testimonials.jpg width=375 Looking at the add pictures again it appears that it folds accordion style and goes in the box/ holder on the roof edge.
Itinerant1 12/18/22 03:19pm Tech Issues
RE: solar awning

I always want my solar production under tree cover. Make for a nice advertisement picture though, warm fuzzy feeling and green energy. I'd be skeptical about longterm life of the in and out of the solar awning.
Itinerant1 12/18/22 12:27pm Tech Issues
RE: Lithium for dummies: need advice in simple terms

Great info -- very thought-provoking. Someone mentioned a generator. I have a Honda 2000 and almost never use it -- I run it at home to keep it tuned up. We camp in search of silence (since we live in the city). So the generator is more for emergencies than for convenience. I will look into the BB self-heated unit. But I do have a question -- if I insulate the battery box, and we are camping in 25 degree weather (not that cold), I assume that the internal heater will cycle on and off, keeping the battery at 35 degrees, right? If that is true, then the 1.8 amp draw from the heater will be fairly minimal, since it is not continual. otrfun, if you have the time, could you tell us more about the DIY heater you made? You mentioned that it has a "Switchable control (thermostat or BMS)." Please forgive my ignorance -- what is a BMS? Do you have a post or a youtube video describing your setup? I like the idea of a separate heater that is not built in to the battery. I find that when features are bundled within a high-dollar purchase, one point of failure can trash the whole assembly. BMS= battery management system. Basically it's the protection for the battery cells. It could be... HVD= high voltage disconnect LVD= low voltage disconnect High temp disconnect Low temp disconnect and possibly other things depending on which hasbeen used. If 25f is the low and during the day maybe higher you should be able to easily come up with a solution to keep the battery warm. Theft might have to be thought about tho.
Itinerant1 12/09/22 01:13pm Tech Issues
RE: Lithium for dummies: need advice in simple terms

One more thought that seems to be parroted is the temperature. When talking about 0c/ 32f its the cells (batteries) temperature not the ambient temperature that's the end all be all of charging and as mentioned hopefully the cells have the cut off to charging from the bms. Cutting off early morning charging from solar when it's below ambient freezing temps is crazy especially during this time of the year as the day light get shorter and the arc of the sun is lower. Precious charge is wasted if your controller can turn off charging and battery cell temps are above 32f. I've been in 17f ambient temps, cells showing 38-40f (I can see all 20 cell temps and my bms/ ems can) solar charging at 20-30a and carrying my misc loads. This can extend the need for hooking up the generator for hold over charging, right now with the shorter daylight and my daily "wants", we're 21 days in partial solar charge living of 35% - 92% SOC. As long as my SOC is 60-65% by sundown that leaves enough to run the furnace use the microwave for dinner and breakfast, make a couple pots of coffee, toaster, humidifier usally going 24/7 and charging the phones, tablets and laptops all before the sun comes up. This is going into the 7th winter season fulltime living like this. ;)
Itinerant1 12/08/22 10:17am Tech Issues
RE: Lithium for dummies: need advice in simple terms

My concern for the OP would be having lfp batteries on the outside of trailer and doing long extended camping in cold weather were the temps do not get above freezing for extended periods. Even them being in a a cooler like a Yeti or Otter would still need extra insulating even with the heat types of batteries. I have a 65qt Otter box cooler and it does keep ice pretty long but can also freeze water in the bottom of the cooler when no ice is present during the winter months in the back of my inclosed truck. Any of these "well" insulated coolers will need more insulation and the coolers aren't cheap to start with. If lead batteries have been working for you under these circumstances I would probably stay with them.
Itinerant1 12/08/22 09:32am Tech Issues
RE: Lithium for dummies: need advice in simple terms

I got the figures from the wobbly wide web. If I were going Li I'd go 40% to 85%. I never will due to cold. Pianotuna you have good advise most of the time but I have to disagree with you on some of your interpreted reading of LiFePO4 (LFP) batteries. But maybe your reading material is better than my hands on experience living off of them. ;)
Itinerant1 12/08/22 07:11am Tech Issues
RE: Mounting cell antenna on a spring?

I have that antenna and as you can see it's mount on my truck mirror arm now for over 1.5 year and 84,000 miles. In speeds over 70 and a good cross wind it will move in circles and I'm sure it's good intertainment for fellow travelers seeing it. That spring will allow it to move some but not enough if it were mounted where you show it that if you hit a larger branch that it would flex enough not to damage the top portion of the antenna. https://i.imgur.com/pCE2uxDl.jpg
Itinerant1 12/08/22 06:33am Tech Issues
RE: Tech Issue Leave Lithium Do Dads On Charger?

Replacing batteries in the sealed cases isn't that hard just requires a little patience. I use my tablet (Galaxy S6) like a laptop so the battery takes a whopping. Probably this summer I'll have to replace the battery, $25 for battery and an hour of time, good as new. When the S10 phone needs a new battery samething.
Itinerant1 10/07/22 06:02am Tech Issues
RE: what size inverter.

For those who may dry-camp a lot, an inverter's parasitic/no-load current might also be worth considering in addition to output capacity. Some larger inverters (>1500w) can have parasitic/no-load current as high as 3-4a. 3-4a can go-through 72-96ah in 24 hours---it adds up. For what it's worth, we chose an Aims 2000w high-frequency inverter to power the microwave and a/c in our truck camper primarily because of its good inrush capability and low parasitic (and reasonable price). Aim rates the parasitic at .9a. We typically experience around .6 - .7a. I know the Magnum 3000w hybrid inverter/ charger has 2ah or 48ah in 24 hours of idle draw.
Itinerant1 10/05/22 10:52am Tech Issues
RE: Lithium crossing the acceptance threshold…

I miss a good spirited debate about LFP. I hear they start airplanes on fire and phones burst into flames. ;) Yep, I too can recall that the mythologies sure seemed to run rather deep!! 3 tons I haven't seen BFL13 post in awhile. I hope all is well.
Itinerant1 09/14/22 07:56pm Tech Issues
RE: Lithium crossing the acceptance threshold…

I miss a good spirited debate about LFP. I hear they start airplanes on fire and phones burst into flames. ;)
Itinerant1 09/14/22 06:24pm Tech Issues
RE: no noise generators

I did not say these batteries don't lose capacity and eventually end up in the landfill or recycling center, everything does. But once again you go off on a different chemistry within lithium. As far as the deflection to EV in an rv thread... who would of thought that batteries will need replacing. Can't offard to play in the EV playground stay with tried and true gas engine vehicle.
Itinerant1 08/22/22 12:48pm Tech Issues
RE: no noise generators

hello fellow campers. with some parks up here now banning generators, some in designated areas and some outright, and the fact that getting a electric serviced site is getting harder and harder during peak season, has anyone tried these new power supplies back up power theres this company and another other company keep in mind prices are in CA dollars, they are probably 1/4 the price in the US. Just wondering if this is a possible solution to running a generator, it may not run the A/C very long but up here we can get by without that and the microwave, and run the fridge on propane, just need the lights and electronics pumps, fans and maybe some music for a 3 day weekend. perhaps the tv for a movie on a rainy day. if you have one let me know how it works for you. These are nothing more than an expensive battery with inverter in a box. Calling them a "generator" is laughable at best as when you discharge them you must eventually recharge them. Each time you discharge/recharge the batteries lose capacity. Storing them can also be problematic at best, batteries of any type must be stored properly, Lithium batteries are no exception to this. Failing to store properly will result in a unusable battery in short order. BATTERY UNIVERSITY says this.. Battery SoC is reflected in OCV. Lithium manganese oxide reads 3.82V at 40% SoC (25°C), and about 3.70V at 30% (shipping requirement). Temperature and previous charge and discharge activities affect the reading. Allow the battery to rest for 90 minutes before taking the reading. Li-ion cannot dip below 2V/cell for any length of time. Copper shunts form inside the cells that can lead to elevated self-discharge or a partial electrical short. (See BU-802b: Elevated Self-discharge) If recharged, the cells might become unstable, causing excessive heat or showing other anomalies. Li-ion batteries that have been under stress may function normally but are more sensitive to mechanical abuse. Liability for incorrect handling should go to the user and not the battery manufacturer." Tektronix has a good guide on Lithium battery maintenance and storage.. HERE "Lithium-Ion Battery Maintenance Guidelines Lithium-Ion rechargeable batteries require routine maintenance and care in their use and handling. Read and follow the guidelines in this document to safely use Lithium-Ion batteries and achieve the maximum battery life span. Overview Do not leave batteries unused for extended periods of time, either in the product or in storage. When a battery has been unused for 6 months, check the charge status and charge or dispose of the battery as appropriate. The typical estimated life of a Lithium-Ion battery is about two to three years or 300 to 500 charge cycles, whichever occurs first. One charge cycle is a period of use from fully charged, to fully discharged, and fully recharged again. Use a two to three year life expectancy for batteries that do not run through complete charge cycles. Rechargeable Lithium-Ion batteries have a limited life and will gradually lose their capacity to hold a charge. This loss of capacity (aging) is irreversible. As the battery loses capacity, the length of time it will power the product (run time) decreases. Lithium-Ion batteries continue to slowly discharge (self-discharge) when not in use or while in storage. Routinely check the battery’s charge status. The product user manual typically includes information on how to check battery status, as well as battery charging instructions" To put this a bit more into perspective, batteries of any type whether being used or being stored lose capacity and life. Contrast tho generators which as long as you check and change the oil at recommended intervals and you do not leave gas sit in the carb while stored can be used and stored for many, many yrs without loss in capacity.. Come back in 5 yrs, 10 yrs, 15 yrs, 20 yrs and give a report on how well your purchase of that "power station" or "noiseless generator" has gone.. So far, my noisy generators have given me 20+ yrs of service and I have even added a 30+ yr old gen to my stock which sat abused with water in the fuel tank for so long that the tank was loaded with rust right up to the top of the tank.. Cleaned the rust out of tank and carb added some fresh gas and engine came to life after two pulls.. Would love to see a 30yr old Lithium based power pack with inverter come back to life with full capacity after being stored for 30yrs with no periodic charges.. If your going to quote and use it like the gospel try staying in the same chemistry. Li-Colbate is not LiFePO4 which is used in these battery/ inverter devices and what most are using in the rvs. Next will be Lifepo4 isn't safe because Li starts fire on planes.
Itinerant1 08/22/22 11:42am Tech Issues
RE: Powering AC unit built into travel trailer with solar?

No matter what "batteries" you use, they all need to be recharged as soon as possible, Lithiums are not immune to this and are not an exception if you want to get the most life for the money you spend. I thought this was there main claim to fame??? Lithiums do a much better job than FLA, AGM or gel, but they are not 100% immune to some degradation if you continually allow them to sit in a partial discharge. Some of the claim to fame is the not to charge to 100% in order to store them. Reality is you don't really control the charge, the BMS does that. Allow them to store at too low of a charge and you take a chance the BMS will disconnect (BMS has low voltage disconnect built in and most BMS once that is tripped are not able to be reconnected) and now you have an expensive door stop. The Lithium battery pack will have a bit more capacity built in, often about 10% more capacity, but you typically cannot use that capacity due to BMS. The BMS stops you from charging or discharging more than 90% of the battery, good quality BMS will prevent you from using more that extra capacity. Basically that extra capacity is reserved for the BMS and also not allow battery to fall out of normal and stable state of charge range. I have had some small Lithium batteries swell after being stored in a partial discharge state (inactive for 6 months or more and were not charged until the BMS stopped charging before storing). The bms is the safe guard for the battery or more likely the cells within the battery. A properly setup system has the charging device set to stop charging before the bms needs to interact. That's like saying my emergency brakes stop my truck no need to use the brake pedal while operating the truck. LVD is also part of the bms which does protect the cells/ battery what quality battery manufacturer doesn't allow charging to wake the bms up when it meets their parameters? Why buy a lfp battery if you're just going to store it, stay with dead lead and buy another cheap replacement when you kill it. Small lithium batteries are not large lfp batteries, while your experience in lithium maybe useful my 6.5+ years seems to differ slightly using lfp setup fulltime everyday.
Itinerant1 08/19/22 03:50pm Travel Trailers
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
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