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 > Your search for posts made by 'StirCrazy' found 555 matches.

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RE: RV travel to Vancouver Island restricted

all of bc is foing restricted on friday. you have to stay with in your geographical health regions. Steve
StirCrazy 04/20/21 06:30am RVing in Canada and Alaska
RE: LFP on Shore Power with Inverter/charger?

Why not just write the seller/maker? Who is the most 'senior' user of Li here? (i.e. longest use) I have had a cell phone for 30 years ;) probably not me, I have been playing with small 30AH batteries for about 2 years now but thats it. Steve
StirCrazy 04/20/21 06:28am Tech Issues
RE: LFP on Shore Power with Inverter/charger?

With LFPs it seems you can't believe the Wh or the AH ratings to use with your monitor and you can't really match the voltage with the AH count to do cross checks. Apparently all you have is your AH counter to go by. So my new plan is to use your "allowance" (as described earlier) and use that as your "capacity" never mind what the real capacity might be in the strange LFP wonder-world of inconsistent numbers. YMMV (and no doubt does! :) ) hold up therebig guy, yes you can use voltage in 10% aproximations. the LFP voltage is fairly flat but it is still on enough of a slope to tell when your at 10%, 20%, 30% and so on. they do make basick idiot % meters that are LI compatable. the victron clone I have in my camper will show AH, Voltage or % and current flowing in or out... so you can get the same simple monitoring on LFP for just as cheep. Steve
StirCrazy 04/20/21 06:25am Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

Victron is like GO Power or like Battleborn. They came out with a quality product when there wasn't much competition and they could set their price. Now that there is lots of competition they don't want to drop their price and start ad campaigns to trash the quality of other manufactures, say because they are made in China. Well, both good and bad quality can come out of china and that depends largely on the specs the importing company gives the manufacturer. Most of Victron probably comes over in sea cans and they're good quality. My 50 buck battery monitor is the same set up as the 250.00 Victron (CDN pricing) the only thing different is the Victron has Bluetooth. Bluetooth would be worth an extra 20 to 30 bucks, but not 200.00. Steve Keep in mind that Victron offers a lot more than just Bluetooth. Many of their components coordinate with each other, Victron also uses CAN bus, have developed the Venus Operating System for their monitoring and control features and opened it up for developers and DIYers. For example, a developer can run the Victron operating system on a Raspberry Pi and create their own custom monitoring and automation. And a lot of people do this. So if you need that sort of interoperability and flexibility, it's hard to beat Victron. If you also don't mind paying the premium, then Victron is pretty much impossible to beat. With all that said, it still looks like the claim that Victron uses some special lookup table for their Smart Shunt is false. It has a lot of great features, but that isn't one of them from what I can tell. And even if it is true, with most LiFePo4 packs you'll never be able to tell the difference between counting Coulombs and counting Coulombs plus using a lookup table. obviously if your going with a whole system you stick with compatable parts, but most of the time you are not and just getting a piece here and there. the smart shunt is oneof there pieces I do like to add in with liFePo4 setups, a little pricy but not to bad. a lot of the controlers we see out there are pi based thats why there has been a flood of them laitly even in BMS. I am looking at a couple BMS that are basicly using a Pi as the brains. they are looking pretty good so far.. Steve
StirCrazy 04/20/21 06:18am Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

I disagree here, I do agree the Victron is good, but I dont agree they are worth the price. there are so many unit that use the exact same software/hardware out there for less than 1/4 the price. back in the day they used to be the best, not there just riding on there old name and trying to justify prices that are 400% more than they should be. Steve Please do share... I believe I just did ;) Victron is like GO Power or like battleborn. they came out with a quality product when there wasnt much compitition and they could set there price. now that there is lots of compatition they dont want to drop there price and start add compains to trash the quality of other manufactures, say because they are made in china. well both good and bad quality can come out of china and that depends largly on the specs the inporting company gives the manufacture. most of Victron probably comes over in sea cans and there good quality. my 50 buck battery monitor is the same set up as the 250.00 victron (cdn pricing) the only thing different is the victron has bluetooth. bluetooth would be worth an extra 20 to 30 bucks ,but not 200.00. Steve
StirCrazy 04/19/21 06:48am Tech Issues
RE: LFP on Shore Power with Inverter/charger?

PS the resting or 'nominal' voltage of LiFePO4 is NOT 13.6V. The resting voltage is 13.2 - 13.3 and the 'nominal' voltage is 12.8V. thats kind of a bold and misleading statment. the resting voltage all depends on state of charge, if you are 100% charged then the resting voltage is 13.6V Steve
StirCrazy 04/19/21 06:41am Tech Issues
RE: LFP on Shore Power with Inverter/charger?

Steve, thanks for the clarification. I was using CCA because it is the only thing I can think of with battery ratings that are a measure of its power. FWC said a battery's power is its max current at its nominal voltage (if I got that right) so 800CCA is twice the power of 400CCA. I don't know where an RVer cares about power as such. Ads saying a battery has "twice the power" got me wondering what that is supposed to mean. Seems to be "Sales" talk. ? That Odyssey 31 hybrid battery that allows a high draw makes that claim, and ISTR LFP ads saying that too. Another puzzle is how they do AH with LFPs, but that only matters to those who operate them trying to keep track of usage while camping if they even do that. EG, The blurbs say don't use Peukert, but still say the LFP is 100AH because they ran it down at 100 amps in 1 hour so that is 100AH. Then they sort of dance around saying it also takes 20 hours to run it down at 5 amps, so that is 100AH at the 20 hr rate. But no Peukert here folks! :) It makes your head spin. Then they start in with the Wh, but use the 12.8 nominal voltage to get the AH. OR----did they get the AH first and then invent the Wh???? In the previous example, it was 1536 Wh and 120 AH at 12.8v The battery is full at 13.6v so that is where you have to start. Either: A. the battery is really 1536/13.6 = 113AH , or B. the battery is really 120AH so x 13.6 = 1632 Wh Which is it? If you are monitoring by Wh usage or AH usage, I would think that is important for setting up your monitor. Not a clue. so Steve, what are you going to do for operating your "280AH" battery for setting up a monitor? Just curious on my part, but other LFPers might be interested. ? oh where to start, so many questions at once haha.. the first thing you have to come to terms with when dealing with LFP is it isnt lead acid. every other battery flooded, agm, SiO2 and so on is a lead based tech. Most Lithium batteries dont fall into the voltage specs that are simular to the lead based batteries but LFP comes very close. close enough we can use it interchanagbly. having said that its overall volatage is a little higher so conventional ways of measuring wont quite work, and some of the conventions we are use to are out the window. there is pretty much zero Peukert effect with the LFP chemistry so for all intensive purposes you don't worry about it. this is a bonus of LFP as you can run high loads with out losing AH. As for the 20 hour rate, I imagine there must be a standard voltage that the test is done at but I am not totaly sure on that. I will probably use the cheepest monitoring thing I can find on Amazon that is LFP compatable. I have a little 50 buck version of the Victron in my camper that says it is LiFePo4 compatable so if that works Ill grab another. plus the few BMS setups I have narrowed my choices down to have bluetooth and an app I can check out the other battery info with. so far it looks like I am going to go with the overkill BMS but there are a couple other ones I am trying to find out more info on. Steve
StirCrazy 04/19/21 06:38am Tech Issues
RE: LFP on Shore Power with Inverter/charger?

Ok one last shot at it. IMO Steve has it wrong by saying "power" has a time component. AFAIK Watts is "power" and no time, while Wh is the "energy", which is over time. yup I did have a brain fart. I apoligise for that, but thats isn't what the main point of my post was about. it was about you trying to use CCA as some sort of power capacity for the battery. first of all why are you using a starting battery in your rv? and second the definition of CCA is Cold cranking amps (CCA) Starter batteries, also known as SLI (starter light ignition) are marked with CCA. The number indicates the current in ampere that the battery can deliver at –18°C (0°F). American and European norms differ slightly. AH if we assume that the voltage is 12.0V then makes sence and is great for comparing batteries. when I first started buying batteries there was no standard and some would use reserve capacity , some would have AH but not the chart they would pick one rate and other companies would pick a different rate to make there batteries sound better.... it isnt 100% accurate but it gives you a method of comparison. I wouldnt take it for gospal that if we buy a 100 AH lead asid that we are going to get 100 ah out of it as it all depends on how you vary the voltage and current but it is an aproximation of the capacity and as long as we understand that were all good. Steve
StirCrazy 04/18/21 09:58am Tech Issues
RE: Arctic Fox 1150 is breaking my 2016 Ford 350 dually

Torklift article sounds like written by 3rd grader. They talk about "bed frame" Have never seen such animal. All truck beds I have seen are resting on truck frame. Somebody missed his classes. go look under your truck, there is the bed resting on a subframe (or crossmembers if you like) that is on the truck frame. Steve
StirCrazy 04/18/21 09:10am Truck Campers
RE: Solar charge controller confusion

“ Yes the battery one and two slots on the back of the controller were wired directly into the panel battery slots , I hadn’t seen that before so I was confused ” In concept I don’t see a problem - depending on battery location I suppose it may have made for an easier install?? as long as it is coming from the solar controler it is fine, just clean up some of the crimp jobs or leave them and just watch if you get your hand near them. my original question was did they run strait off the panels or from the controler. if from the controler all is good. just a different place to tie in as long as the wire size is adiquate. I know I couldnt fit both sets of wires in mine as I have the battery ones maxed out other wise that would have saved me 6 feet of solar cable ;). Steve
StirCrazy 04/15/21 08:02am Truck Campers
RE: LFP on Shore Power with Inverter/charger?

Steve, IMO you are mixing up power and energy now. Based on what DrewE and FWC said here (scroll down) I think I have it right that CCA is power and how long the batt can keep cranking is to do with its energy. ("Capacity" should be its energy IMO. Not sure you should say "reserve power" either. Maybe somebody can sort that out) https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/30219738/srt/pd/pging/1.cfm FWC's second para relates to my previous notion too, a low power batt with lots of energy like a deep cycle. no sir, i belive you are confused, power = work over time or the power triangle in electricity where P=IV (power = Current X Voltage) not confusing power and energy at all, Like I said power is a amount of work over a spicific period of time or to simplify it how fast you are doing it. Energy is the total amount of work done irregardless of the time it took. I think you not understanding a lot of the terms leads to your state of confusion resulting in the same questions being asked over and over when multiple people explain them. this is ok, we are all here to learn. for eg, you may think that because my spelling isnt the greatest that I am uneducated so I must know nothing but yet I am a stationary engineer and a mechanical engineer (well 2 courses short on the Mechanical engineering so I dont have my pinky ring.. but I am ok with that ;) going back to your origianl CCA is nothing but a potential to do work. and having said this it is a potential at a spicifc tempature. that is what the battery is capable of, not what it is doing. so untill you turn that key it is just a potential to do work. Steve
StirCrazy 04/14/21 08:01pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

,From learned experience my position is “you usually get what you’re willing to pay for” (Victron $$).. But at least you’ve arrived at the conclusion that there IS the possibility of errors with straight coulomb counting, so we’ve made progress, eh :) , and kudo’s to you Sir if your favorite meter (unknown to me) is meeting all your expectations - sounds like you’ve saved a few bucks too!!... For ‘evidence’ you might try litigation..., 3 tons I disagree here, I do agree the Victron is good, but I dont agree they are worth the price. there are so many unit that use the exact same software/hardware out there for less than 1/4 the price. back in the day they used to be the best, not there just riding on there old name and trying to justify prices that are 400% more than they should be. Steve
StirCrazy 04/14/21 07:40pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

3 tons, For example, the problem the engineer in the video you posted is talking about is a problem that doesn't really exist in our application. Also the charge/discharge curve he's using as an example is not nearly as flat as a LiFePo4 curve. The drop off in current is going to be less than the 20% mark where you shouldn't be discharging anyway. in the discharge curve you wont get a drop in current as the appliance?load is still going to draw the same amount of watts so as the voltage drop you will actualy draw more current untill you hit the point which the battery cant keep up, its usaly dead at that point. Several capacity tests on LFP batteries have showen this. Steve
StirCrazy 04/14/21 07:36pm Tech Issues
RE: LFP on Shore Power with Inverter/charger?

If I am right that CCA is "power" , then an experienced RVer is looking for a deep cycle battery with LESS power. He stays away from those starting batteries, and sure would not want one with "Twice the Power". it isnt power. power is watts, it is the potential. you need amps and a voltage to make power and that is applied over a period of time. starter batteries have less power than say a GC battery, but they are designed to release more over a shorter period of time. so they are good at putting out a short burst at 800 amps. where they heavy design of a GC battery limits the peak discharge but allows a larger reserve. so say a starting battery can do 800 amps for 1 minuit a gc battery may be able to do 150 amps for 30 min. Steve
StirCrazy 04/13/21 06:42pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

“ But a cheap coulomb counter is fine with me because it's an inherently unnecessary device.” Ok, but for clarity it should be noted here that a meter that only counts coulombs is not structly compatible with LFP, though it may be fine above 50% SOC - in practical terms with LFP, SOC only begins to get important below 50%... As has been already noted here several times, computing SOC with LFP requires a sophisticated algorithm including a ‘look-up’ ledger which is necessary when below a 50% SOC...This is due to the extremely flat voltage curve characteristics of LFP, and why (as previously stated) I had to ditch my former meter... This is interesting. There are a lot of people using the AiLi for their LFPs over at diysolarforum.com and I've never heard this before. I'll go ask the gurus over there and see if I can get some clarity. I've been using it for almost a year now and it has usually agreed with the BMS on SOC. Edit: To be clear, a Coulomb counter does not rely on voltage. ya there is one supplier that you can buy privat from the guy and he has a good reputation. Aili and the other one are the main places people seam to buy from. DIY solar is pretty week on the RV side. still recomending 12V panels because 24V is dangeorous...... Steve
StirCrazy 04/13/21 06:36pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

Jayco creek said: With the price getting so low for Lifepo4,I can't see a reason not to switch when there about the price of a quality lead acid...JMHO,.. So what is the current price comparison? for making your own you can build a 280 usable AH for about 600 bucks now. to get that in deep cycles batteries you probably over 1000 for high quality and about the same in cheep on sale (these prices are CDN). other advantages besides price now days is weight that would be about 46LB and it would give me more capacity than the 240lbs of 6V I have now that only have 235AH usable. also the size, this one Li battery is the side of one of the 6V batteries. so 1/6th the weight and 1/4 the size. Steve So $600 CAD is about $580 US if I converted right. I realize everyone has different electrical requirements but 2 Sam's Club 6vGC batteries are still under $200 in us dollars so I don't see a similar cost. I'm not sure what you mean by high quality deep cycle batteries, but I paid $74 apiece for my 2 GC batterers from Sam's Club 14 years ago and they are still doing fine and I only dry camp. If they failed tomorrow I can still buy them for $90 apiece, so I don't see a cost comparison that is close yet. I understand the weight is a lot less as well as the foot print and in time with all the EV's coming out they may be cheaper. your kinda off on your conversion 600 cdn is a little over 478.00 US and you need 6 of thoes batteries to get 280 to 300 usable AH. I dont use cheep batteries, my GC batteries in my 5th wheel are 325 CDN each for 235AH and are 14 years old and just showing signs of needing replacment. so for me to get the same power I would need 4 to 6 batteries so eaven at 4 that is over 1200 bucks for less usable AH
StirCrazy 04/13/21 06:31pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

Jayco creek said: With the price getting so low for Lifepo4,I can't see a reason not to switch when there about the price of a quality lead acid...JMHO,.. So what is the current price comparison? for making your own you can build a 280 usable AH for about 600 bucks now. to get that in deep cycles batteries you probably over 1000 for high quality and about the same in cheep on sale (these prices are CDN). other advantages besides price now days is weight that would be about 46LB and it would give me more capacity than the 240lbs of 6V I have now that only have 235AH usable. also the size, this one Li battery is the side of one of the 6V batteries. so 1/6th the weight and 1/4 the size. Steve So $600 CAD is about $580 US if I converted right. I realize everyone has different electrical requirements but 2 Sam's Club 6vGC batteries are still under $200 in us dollars so I don't see a similar cost. I'm not sure what you mean by high quality deep cycle batteries, but I paid $74 apiece for my 2 GC batterers from Sam's Club 14 years ago and they are still doing fine and I only dry camp. If they failed tomorrow I can still buy them for $90 apiece, so I don't see a cost comparison that is close yet. I understand the weight is a lot less as well as the foot print and in time with all the EV's coming out they may be cheaper. your kinda off on your conversion 600 cdn is a little over 478.00 US
StirCrazy 04/13/21 06:30pm Tech Issues
RE: LiFePo4 vs Lead Acid...Some points of interest.

Jayco creek said: With the price getting so low for Lifepo4,I can't see a reason not to switch when there about the price of a quality lead acid...JMHO,.. So what is the current price comparison? for making your own you can build a 280 usable AH for about 600 bucks now. to get that in deep cycles batteries you probably over 1000 for high quality and about the same in cheep on sale (these prices are CDN). other advantages besides price now days is weight that would be about 46LB and it would give me more capacity than the 240lbs of 6V I have now that only have 235AH usable. also the size, this one Li battery is the side of one of the 6V batteries. so 1/6th the weight and 1/4 the size. Steve Do the LiPo4 batteries require a special charger? If so, you should include the price of that item also. its kind of a mute point. unless you custom order your camper the charge in 90% of the campers shouldn't be used anyways. they are starting to get better but they will still kill your battery faster than a good one. the first thing I do is put in a proper 4 stage charger in anything I buy. so with a LiFePo4 I will just put in a proper 2 stage instead, or if you have one that is already Li compatable (which I have seen a few factory ones) your already good, just have to flip the button. Steve
StirCrazy 04/13/21 06:26pm Tech Issues
RE: Solar charge controller confusion

so do you have a charge controler, all that looks like is some one who didnt know what they are doing wired the panel directly to the battery, unless the panel is one that has a built in controler like a portable kit. either way I would disconect it an do it right if there isnt a controler. I also see bare striped wire that isnt covered by the conectors. Steve
StirCrazy 04/13/21 06:21pm Truck Campers
RE: Banff, Lake Louise and Jasper, Alberta

I actually scored a site! I was number 77 this morning when the site went live....I couldn't believe my eyes. We got a site at Lake Louse Hard Sided camping as well as Banff Trailer Court, full hookups. Last week Friday I was able to score a site at Wabbasso near Jasper, so we're good to go. so much for staying to your local area for travel recomendations. I was there this morning and I was 57000 when it went live. last week jasper sold out in under and hour, the week befor Mt revelstoke sold out in under 20 min.
StirCrazy 04/12/21 06:15pm RVing in Canada and Alaska
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