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 > Your search for posts made by '3 tons' found 523 matches.

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  Subject Author Date Posted Forum
RE: New battery cost.

Li are not a good option for Edmonton. Too cold in winter time. . well thats a load of BS. only no good if you camp in the winter and insist on leaving them on the tounge. Charge an LiFePo4 at -40. Not recommended you say? To run what I want I'd need 700 lbs of battery. Think I want to move that into the RV when it is -30? First off, you’d need half that weight and half that footprint with LFP, and if you moved them inside (or simply provide heat into a compartment) ‘Presto’ it suddenly becomes a ‘Bogie issue’….How is this minor effort deemed to be insurmountable??…AND SiO2’s ain’t cheap, eh?….Fewer LPF’s are required for the same ‘usable’ SiO2 amp/hrs, meaning you’ll likely save some hard earned moola… Waaay too much ‘hand wringing’ going on here…JMO 3 tons
3 tons 07/25/22 03:53pm Tech Issues
RE: Coleman Mach AC won't do anything - no fan, no ac

Try this, https://www.youtube.com/watch?v=VSgIk8S_i-c 3 tons
3 tons 07/25/22 12:27pm Tech Issues
RE: Coleman Mach AC won't do anything - no fan, no ac

I flipped the breaker on and off but have not put a meter to it. That is my next to do... I am bouncing in and out to work on this thing between work calls today. The 12v portion of the unit is what I am curious of. I am not sure how that works. The unit has a built in thermostat, not a separate wall thermostat. Does the fan itself operate off 12 volts? Sorry, I stand corrected, I just checked my Coleman Mach 1 and the fan will not operate without 120v…
3 tons 07/25/22 12:22pm Tech Issues
RE: Coleman Mach AC won't do anything - no fan, no ac

Is there anything inline between the breaker and the AC unit? No, have you checked at the breaker?? Upon re-read, you say the fan won’t come on, yet I believe the fan portion is 12v?…This should tell us something… 3 tons
3 tons 07/25/22 11:30am Tech Issues
RE: Easy Start By Micro Air

“ Now add more solar and the #s really start to look good. Less from the batteries and a little charge on off cycles. “ Well I’m kinda jealous (lol :)), but at now 660w (via an 8 panel home brew and two controllers - MPPT & PWM…) I’ve nearly run out of a truck camper roof space!!…The consolation though is that it’s just a single-slide camper… 3 tons
3 tons 07/24/22 03:08pm Tech Issues
RE: Coleman Mach AC won't do anything - no fan, no ac

Not too sure about your Coleman, but the first thing to check is to see if the t-stat (wall mounted??) uses a battery…Beyond that, I’d want to pull the cover off to access the power terminals for further eval… 3 tons
3 tons 07/24/22 03:02pm Tech Issues
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
3 tons 07/24/22 09:58am Tech Issues
RE: Easy Start By Micro Air

While at Donner Lake today… I decided to do some raw meter testing, AFTER an initial camper cooldown from 84d/f to 77d/f…Start of 1300 test, outside temp was at 90d/f, and end of test 1500 outside temp was at 88d/f…(FWIW, I took a nap in between these hours…). Equipment: Two 200a/hrs LFP (actual load tested at 215a/hr per). 2000w ProSine PSW, pass-thru inverter-charger. Victron SOC meter with bluetooth. 660w solar (serial add-ons…). System is 12v, 0004 cables 6’ roundtrip… Coleman Mach 1 P.S. 11kbtu air conditioner (w/Easy-Start) Single full wall slide-out, 10’ Eagle Cap Truck Camper. Duty cycle (after initial cooldown period) was approx 5 min ON, 5 min OFF (fan continuous run on low). Readings were via Victron BMV-12 SOC meter: 1300 (compressor ON, fan low)….Note, upon edit, to clarify (say upon test start) the -57amp figure (below) represents the difference between the amount being harvested vs air conditioner consumption, which is why the negative value referred to as the deficit… ************* Starting SOC: 85.5% (approx 340a/hr of remaining capacity at start). Amps (e.g. deficit after harvest amount): -57amps (dc) LFP Voltage: 13.05v ********** 1500 (compressor ON, fan low) Duty cycle had now increased to approx 8.5 min ON, 6.5 min OFF (fan continuous). SOC: 72% (approx. 288a/hrs remaining capacity). Amps (e.g. deficit after harvest amount): -54.5amps (dc) LFP Voltage: 12.97 *********** Using a separate hall effect meter at the inverter’s 120v output (compressor ON, fan low): Amps (ac): 8.5 Pf: 0.97 Hz: 60 Watts: 972 Voltage: 116 ************ BTW, between compressor ON-OFF cycling, I used the Keurig one time at about 125 amps (dc), for an additional 2 a/hrs of battery consumption - Brewing completed before next compressor run call!! ************ FWIW (since writing the above summary - compressor ON, fan low), here’s two more unplanned readings at 1600, and 1700…Temps are now starting to drop off a bit….I’m expecting temps to be pleasant again starting at around 1800-1830 as sun angle drops off…(Cools off rather nicely here in the evenings :) 1600: SOC: 64% (approx. 256a/hrs remaining capacity). Amps: -63 (dc)…Some dang tree shading now over a couple of PV panels… LFP Voltage: 12.94 1700: SOC: 55% (approx. 220a/hrs remaining capacity). Amps: -73 (dc)…Heavier shading LFP Voltage: 12.90 Compressor duty cycle (at 1700 was 5 min ON, 6.5 min OFF…). ***************** We maintained a comfortable 77d/f t-stat setting the whole time (still ongoing…). The main variable was the eventual tree shading of the panels, but still lots of battery reserve and will likely be at 90’ish % charge (this, my ‘normal full’ by say noonish - except for periodic cell-balancing… Most importantly (non-intuitively so!), note that in this example, harvesting at a rate of 1 to 1 ratio with power consumption is not necessary…Having a deep enough reserve is what’s needed, aided by Lithium’s relatively flat discharge plateau… Quite naturally, various equipment, camper size and user experience will vary…Though understandably not for everyone, yet at least this provides an example of what might be achievable - haven’t started the Honda 2200 in nearly a year… *************** Oops, and this one final 1800 result for an even more comprehensive trend-line: Compressor duty cycle (at 1800) was 3.5min ON, 9 min OFF… Now starting to cool off nicely! SOC: 45% (180a/hrs remaining capacity) Amps: -76.4 (dc) still heavy shading…. LFP Voltage: 12.90 Total run time (including initial 100% duty cycle cooldown), 5hrs 25min… Hope some find this example interesting … 3 tons
3 tons 07/23/22 10:19pm Tech Issues
RE: DRW vs SRW safety, tire blowout

Since the frame pivots on the axle at same point of a DRW and SRW pickups, I think the stability comes more from sidewall stiffness and higher rated springs. Until you start picking up a rear wheel I do not feel the width plays a role. Believe whatever you like…as I stated, not from pontification but from actual real back to back experience from having two identical trucks differing ONLY in SRW vs DRW, there IS an outrigger effect, but honestly I almost feel like I’m barking at the moon, so for those doubting Thomas’s enjoy your comfort providing paradigm and feel free to disregard…:) 3 tons
3 tons 07/22/22 01:15pm Truck Campers
RE: DRW vs SRW safety, tire blowout

The weakest part of a tire is the sidewall…Since you already have uber robust 19.5’s, I’m afraid I’m missing your concern??…I suppose staying home is always an alternative option?? 3 tons I am not worried about a blowout with those tires. The issue this post was attempting to address was the blowout safety aspect that is often cited by DRW drivers as an argument for DRW over SRW. While logical, my feeling was that this argument for DRW blowout safety superiority is not supported by the accident data. Most of the replies here support that conclusion. IMO, the advantage of DRW is lateral stability on uneven roads and cross winds. I just returned from a 7500 mile trip with a 12,000 lb SRW (11,000 GVWR, i.e. overloaded). Crosswinds and uneven roads were inconvenient. Not unsafe, but definitely slowed me down and made driving a lot less fun. I can't definitively say that a DRW would have been a more pleasant experience, but it seemed to me that the DRW truck campers were doing better than I was. I am curious to get the camper on a DRW to see if it is just my lack of experience, or, if the wider rear track helps substantially. Based on anecdotal reports from other drivers that went from SRW to DRW, I suspect the difference would be substantial. Oh got it :) (sorry, I didn’t peruse the whole thread, so JMHO here…), well to your question, I’ve had both nearly identical trucks (with campers) with the only mechanical difference being SWR vs DRW and my first impression after driving the DRW was truly night and day concerning stability and sway…Part of this I would attribute to the fact that DRW tire size is different (narrower width sidewalls = reduced sway) and that the duallies act very much like outriggers (lateral supports) on a crane - a huge improvement in handling period…Trust that the driving difference is quite substantial and from my perspective ‘well worth’ the extra $1,600 or so premium, in fact due to this additional confidence and safety quotient (thinking of passengers) while carrying a heavy camper I would never go back to a SRW - it’ll work BUT it’s definitely NOT the proper tool for the job…I also camp a lot RZR off-roading on BLM lands, and (while it’s possible…), but I’ve yet to experience a single rock between the rear tires, and often cross the Sierra’s (hwys 50 & 80) in the snow (4x4 cummins, LB, CC, 4:10) and have never been required to chain-up…No chance of going back for us… I’m glad that you asked… 3 tons
3 tons 07/21/22 02:14pm Truck Campers
RE: DRW vs SRW safety, tire blowout

The weakest part of a tire is the sidewall…Since you already have uber robust 19.5’s, I’m afraid I’m missing your concern??…I suppose staying home is always an alternative option?? 3 tons
3 tons 07/21/22 08:53am Truck Campers
RE: Easy Start By Micro Air

What about a 15k btu ac, Easy Start and Honda eu2000i? Or do we need the 2200? Honda 2200 is rated at 18.3a (short term), and 15a continuous, so you’d need to check out your air conditioner amp spec’s to be sure, and have your onboard converter-charger disabled (at the breaker)… ‘Eco mode’ might be somewhat questionable, though maybe possible with a soft-start…Concurrent solar can take care of charging duties while the converter is disabled… As previously mentioned, elevation and higher ambient temps will derate any generator’s output, so maybe a few actual users will chime in! JMO 3 tons
3 tons 07/20/22 09:46pm Tech Issues
RE: Inverter ?

Hi, Magnum does not recommend powering the roof air with their 3000 watt hybrid inverter. I'd go for a generator. My 11 year old Xantrex ProSine PSW 2.0 2000w pass-thru runs the 9.5a 11kbtu Coleman regularly without a hitch, so it can depend on the various equipment…It’s in this particular regard that Victron has an outstanding reputation…JMO 3 tons
3 tons 07/20/22 09:18pm Tech Issues
RE: Inverter ?

FWIW, This is a bit anecdotal, but when I had my former two GC’s in series, I once tested the 11kbtu, 9.5a air cond concurrent with 300w solar and was keenly surprised that it ran for 1.5hrs, (compressor cycling at about a 2/3rds duty cycle) before getting to end of test at about 55% SOC…Different equipment, but just saying from experience… 3 tons
3 tons 07/20/22 06:53pm Tech Issues
RE: 2012rvlife.com

I almost thought it was a vulgarity - don’t ya just love lazy acronyms - lol !!
3 tons 07/20/22 04:10pm Tech Issues
RE: Inverter ?

Yes if the 4x GC2 are fully charged they should drive the A/C for an hour. But not much more. The 1 hour discharge rate will reduce capacity close to 50%. 3000w inverter should have no issues. My 2000w will start and run my 16yo Dometic 13.5 BTU A/C same as utility power. Mine will draw 120-130 amps running the A/C. Yes, X 2 3 tons
3 tons 07/20/22 03:32pm Tech Issues
RE: Easy Start By Micro Air

“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.” To some extent I somewhat agree, but (non-intuitively…), if one thinks about it in terms of power consumed vs power recovered ‘over time’ (considering peak and non-peak daylight harvest hours), then (assuming using LFP’s) it becomes more of a battery capacity (think, water well bladder-like) ‘balancing act’ of what goes in - vs what goes out over a time (i.e. usable battery capacity vs consumption vs harvest rate), whereby often a sufficient capacity reserve exist and restoration (if not even to FULL) is achieved before or by noontime while temps are still within a fairly comfortable range Quite naturally this will vary with the vagaries of weather, one’s own rig, equipment, etc, but in this way I’ve found that quite often an assumed 1 to 1 direct ‘in vs out’ energy ratio is seldom a requirement… Here’s just one admittedly anecdotal example using a 11kbtu air cond (9.5a, low fan), 660w solar, two 200a/hr LFP (load tested to an ‘actual’ 215a/hr per…), a 2/3rds air cond duty cycle, with a 2/3rds harvest rate, while assuming batteries starting out at say 90% SOC, this, for a single slide-out Truck Camper: 400a/hr LFP rated capacity, between (example only) 90% - 20% SOC = 280 usable a/hr range (yet from ‘actual LFP experience’, still a somewhat conservative number as voltage plateau remains fairly flat throughout discharge)… 95a (dc) air conditioner @ 2/3rds duty cycle = approx 57a/hrs (dc). 23.5a (dc) hourly adjusted harvest = a 33.5a/hrs hourly run deficit… In view of the aforementioned ‘balancing act’, (just) 280 usable a/hrs / 33.5 a/hr deficit = an approx 8hrs run time (compressor cycling)… Note however that over such hypothetical 8hr extended run time, harvest will not be static… Conversely, a simple 1-to-1 energy ratio paradigm would suggest that a whopping 950w of solar might be required to maintain energy parity (in the longer view, not necessarily so!), and remember that shortly thereafter, sunrise charging will typically resume!…Point here is, depending on a few other multi-dimensioned variables, immediate energy parity is not always necessary, and can often be achieved both simply and passively - where the budget permits…Again, in this scenario it becomes obvious that LFP’s have the clear advantage - Just Saying :) 3 tons
3 tons 07/20/22 02:34pm Tech Issues
RE: Easy Start By Micro Air

From my own perspective (of one who occasionally runs their air conditioner from the inverter), a few observations, but for background, my equipment: 400a/h LFP (formerly, 2 GC wet-cell), 2k watt PSW pass-thru Inverter, 660w solar, Coleman 11kbtu air conditioner w/soft-start, Honda 2200 (formerly, Honda 2000) - system incrementally ($$) upgraded over the years… *************** Several Observations: First off (retrospectively…), compared to wet-cells, voltage sag with LFP’s is uber brief and relatively insignificant in such that (in my view…) this sole characteristic ‘may’ even negate the need for a soft-start - However, this is not an ‘anti-soft-start’ argument, of which I believe is superior to a conventional start cap…FWIW these clever proprietary ‘black boxes’ have even replaced capacitors on modern 120v single-phase, home HVAC blower motors, which ‘electronically synthesize’ a far more efficient three phase current during motor start-ups accompanied with variable start-up frequency, negating the need for the old school capacitors previously used to help keep start-up current and voltage in phase… So I’m somewhat impressed to know that your 2000w inverter (pass-thru or PSW type - I donno??) will run a 13.5kbtu air conditioner (i.e. via characteristically voltage sluggish wet-cells…) interesting - Kudos to the Easy-start!… So for raw estimation purposes only: Considering all loads, your fully charged 340a/h capacity wet-cells have an effective useable capacity of only about half that (170a/h), although supplemented with 500w of solar… However, when using wet-cells, a lower limit of say 60% SOC (State of Charge) seems more practical due to the effects of voltage sag on the compressor motor (ugg!) and what’s now become a struggling inverter…Rising ambient temps will also play a roll increasing motor amperage as well… A rough thumbnail sketch: So assuming an air conditioner duty cycle of say 2/3rds, concurrent with say 2/3rds productive solar harvest, and a 40% battery DOD (Depth of Discharge) equaling say 136 usable battery a/hrs: 120a (dc) air cond @ 2/3rds duty cycle = approx 80a/hrs (dc) 18a (dc) concurrent hourly harvest = 62a/hrs hourly run deficit = about 2hrs runtime (compressor cycling) to 124a/hrs consumed, with 12a/hrs in reserve before 60% SOC - 46a/hrs in reserve before 50% SOC…). Here again, due to their much deeper depth of discharge and nearly stable voltage, LFP’s have a clear advantage via longer run times… ************* Some Notes: Initial camper cooldown period (depending on volume) may require a full duty cycle. This example does not consider ‘other hour’ solar harvest. Onboard Converter-charger (etc) disabled. JMO Only, 3 tons
3 tons 07/20/22 11:55am Tech Issues
RE: Absorption Fridge Running on Solar/Battery/Inverter System

…My neighbor has a 9 cu/ft 12v dc Danfoss-Sepco compressor refer, freezer on top, and over a time has experienced much difficulty at cooling off the fridge box…He ended up calling the manufacturer and was told that the thermocouple sensor located in the rear upper right corner may have gotten frosted over due to it’s butt-close proximity to the freezer, and also that the freezer was the temp priority… Turns out the fix was to simply remove the cover from the sensor and lower it a bit away from the freezer box…He did exactly that and wiped the frost from the sensor and ‘Wa-La’ the 9 c/ft ‘fully packed’ (for Mom, Dad and 6 kids!) refer box in the 100d/f hot ambient temp camper began to cool down almost immediately :)…FWIW, He’s NOW turned a believer in 12v compressor refers :) !! 3 tons
3 tons 07/19/22 10:18pm Truck Campers
RE: Lithium Battery Charging System

I ended up building my own LifePO4 set-up myself. Went from 98ahr's to 560ahr's. Already had 510w of solar on roof and a 30a charge controller that was compatible. Changed out my 120v on-board charger ( have yet to even use ). Also added a Victron DC/DC 18a isolated charger to top off when driving down the road and never have to worry. Also added a 3000w inverter that we use for the coffee maker in the AM and occasional microwave use and haven't used my generator since going this route. Probably set me back 2.5k total but should last quite a while. With the storage capacity I have now I don't even charge everyday. Not a cheap way to go but I know it will last and it's installed correctly. Retired IBEW Contractor here in SD so I gots the skills. Good luck. Sounds like a very sweet set-up you’ve got Sir :) !! (FWIW, very similar to my 400a/h LFP supported by 660w rooftop truck camper solar…) 3 tons
3 tons 07/19/22 08:49pm Truck Campers
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