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 > Your search for posts made by 'BFL13' found 539 matches.

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  Subject Author Date Posted Forum
RE: SiO2 Charging Profile

"so by running 50 to 80 or 50 to 90% you are just acepting a shorter battery life kinda like if you run a LFP from 100 to 0 all the time you are acepting your only going to get the advertised cycle life which is Ok as long as you are fine with that. but telling people to not fully charge with out telling them that there may be a slight trade off in cycle liffe or capacity the more they do it is not cool. a lot of new people who only know that a battery makes there lights work read this stuff and go out and buy expensive batteies then wonder why there getting killed in 3 years." Lots of advice out there to do 50-80s when on generator recharging so not to waste generator time and fuel doing the higher SOC part with low tapering amps. Also lets you get more AH in during generator hours if those times are restricted. Charging profiles for different battery types are useful for knowing how far up in SOC it is worth going while doing a generator recharge When I first got onto this the big problem was knowing when the batts were up to 80 or 90 % while still being charged so I knew when to stop the gen. Voltage no use and no ammeter on a converter to tell you what amps have tapered to. That is where the Trimetric monitor came in handy with its AH counter It is true that Newbies can have their first set of batts die too soon. Called their Learning Set. Happened to me for sure.
BFL13 05/25/22 10:33am Tech Issues
RE: SiO2 Charging Profile

Whoever replied at 1521, it's not showing on mine yet. Apparently that means you are in Admin's bad books! :) Wudn't me! No, it was Lwiddis. Apparently, you both have to start behaving according to what the Truck Camper mod said. Tee hee! :)
BFL13 05/24/22 07:40pm Tech Issues
RE: SiO2 Charging Profile

More usable capacity. Full amps to 90% If it stayed at constant 56.5 amps till 90% SOC instead, that would take 0.354 Hr or 21 minutes to do the 80-90 instead of 30 minutes as happened. Saving = 9 minutes. (I can do the constant amps with the PowerMax 55 amper. It happens to run at 56.5 steady off the portable generator. It runs, but at lower amps off 120v below 105v. I had to get out the gen at home to do the test because of the long cord from the stick house to the camper made for low 120 with the converter on.) "Usable" is hard to define. I found that "usable" capacity for the case of running the inverter at high loads is when 90 amps at 50% SOC makes the inverter alarm, so that is almost 1C (the way I do that). At less of an inverter load you can go below 50% of course without inverter alarm. How low? Depends on the load amount. I don't know how low you can go doing ordinary loads that will still run at lower voltages. DW came back with the one batt at the time at 20% SOC and things still worked, but those things pull low amps. Same as with FLA to a degree. Not as low as LFP with their slightly higher Voltage per SOC than SiO2's (which is higher than FLA and some AGMs) How dim can the lights get and how slow can the fans go before you declare they are un-usable? At least there is no BMS cutting you off completely. Yipes! Anyway it is what it is. IMO they are sort of like the Stark brand AGMs I had back when, only with the high amp discharge thing added in. I won't be cycling them enough times down to zero to see if they really last as long as the ads say. I doubt they will hardly ever get below 40% the way we operate.
BFL13 05/24/22 07:07pm Tech Issues
RE: SiO2 Charging Profile

Seems fine although not exactly impressed. Seems more limited than what some have previously expressed. Good to know the SiO2 is working for you. What were you sort of expecting?
BFL13 05/24/22 06:16pm Tech Issues
RE: SiO2 Charging Profile

Ok so at 28% charging rate tapering starts at 80% SOC at 19% charging rate tapering starts at 87% (as expected-same idea as the ugly graph for FLA) ---------------- There is some info ? that the same happens with LFP but hard to pin down. Needs some ugly graph work! also with LFP there is another aspect where (more rumour ) something similar happens if you use a lower charging voltage. That is different from the ugly graph where the same charging voltage is used but different amps per size of bank in AH. -------------- I found my test result on the one SiO2 back in Oct 2020 where I used the Vector at its 20 amp setting (it did constant amps at 19 amps for a 19% charging rate) " using the same Vector charger as in my ugly graph with flooded 27DC type batteries, and a 19% charging rate, the Vector stayed in constant amps until 76% SOC Flooded and 87.5% SOC with this SiO2 batt. Amps then taper. Not attempting to compare tapering times since with the Flooded it is very flat 90-100 but steeper for that last 10% with the SiO2. Certainly you get a "faster recharge" from 76% SOC on up because one is tapering and the other is still in Bulk constant amps for part of that range. At the 19% charging rate used for this test, it is the same times up till 76% -can't be faster, the charger can't do faster, but eg, with the Flooded, the 80-90 part takes an hour of tapering, while the SiO2 takes about 1/2 that time then tapers."
BFL13 05/24/22 10:07am Tech Issues
RE: SiO2 Charging Profile

With FLAs doing successive incomplete recharges in a row leads to Progressive Capacity Loss. We talked about this on here about ten years ago. You must do a "recovery" to Full every so often or your capacity gets so low you can't get through the next night. Depends on the whole scenario how many days you can do it. Solar solved that by doing shallow instead of deep cycles and by getting close to or even to Full often when the sun is out. You still have to get to Full every so often and do an overcharge per battery guidelines. Here is a plot showing PCL with five successive 50-90s I did about ten years ago. https://i.imgur.com/JNcZEppl.jpg]https://i.imgur.com/JNcZEppl.jpg
BFL13 05/24/22 07:56am Tech Issues
RE: Twisted Truck? UPDATE-Fixed!

No you drive up part way till height is right Yes awkward to store
BFL13 05/24/22 07:12am Truck Campers
RE: SiO2 Charging Profile

Ty BFL13, Useful information. I'd be tempted to stop at 80% myself. Yes 40 - 80s is 40% too and save gen time Note this is not much use with solar No constant amps and amps taper from noon as sun lowers regardless of battery SOC
BFL13 05/23/22 09:25pm Tech Issues
RE: SiO2 Charging Profile

Whoever replied at 1521, it's not showing on mine yet. Apparently that means you are in Admin's bad books! :)
BFL13 05/23/22 06:03pm Tech Issues
RE: SiO2 Batteries and High Amp Draws

"2 x faster! 3 hrs vs 6 hrs . So how far down in SOC is the starting point where you can charge it up to what SOC ? "Regular" 100AH batts take a very long time to get from 90 to 100% SOC. On generator (their sales pitch for less gen time) you stop the charge at 90 anyway. So what is the comparison in time for doing 50-90s? Seems like a bogus sales claim to me! It could turn on where along in SOC it goes from constant amps to tapering amps. That is why we need the charging profiles to compare them. Anyway, I will check for that with my SiO2s and see how it goes" Ok graph in the other thread, but 50-90 was 90 min vs 139 min sort of more or less almost, so that is 65% of the FLA time not half the time, but it is still a lot. BTW you can't say "2 times faster" when discussing generator time. It is not like eg, 60 mph vs 30 mph. What is meant is "half the time". Sales babble.
BFL13 05/23/22 03:47pm Tech Issues
SiO2 Charging Profile

56.5 constant amps in Bulk is 28% charging rate--expect lower rate to run to a higher SOC before tapering but take longer over all. https://i.imgur.com/Mf504vcl.jpg]https://i.imgur.com/Mf504vcl.jpg Here is the old ugly graph again showing 55 amps on a pair of FLAs rated at 220 but might have been more like 200 if they used the 1 amp instead of the 20 hr rate--don't know now. Doesn't make a lot of diff here though. https://i.imgur.com/JxtrXE1l.jpg]https://i.imgur.com/JxtrXE1l.jpg You can see the times to do a 50-90 are longer with the FLAs because of earlier tapering. Took an hour to do the 80-90 vs 1/2to do the 80-90 with the SiO2 There is some inaccuracy due to the monitor not showing any heat loss but that seems to be not much of a factor. Anyway there it is.
BFL13 05/23/22 03:19pm Tech Issues
RE: Twisted Truck? UPDATE-Fixed!

So your subject says "UPDATE-Fixed!" How did you "fix" it? IMHO for leveling you should always put blocks under two wheels at a time. Need to level side-to-side? Put blocks under the front and rear wheels on that side. Need to level front to back? Put blocks under both front or rear wheels as needed. This will mean that one wheel will have more blocks than the other three, and one wheel will have no blocks, but they will all be on the same level plane, and no twisting. What you did here was lift the left front corner higher than the other three wheels. The truck is kind of "balancing" on the left front and right rear, with the other two wheels providing stability. Not a problem short term but as Grit Dog says you probably don't want to make a habit of it. As reported earlier 21 May at 1117 (unless you don't have that post yet :) ) I fixed it by using three Rhino ramps instead of just one as in the OP. First I used one for the back left to get that end sideways level. That left the front low but no more twist seen above the cab. Then I used one under each front tire to get the whole rig level front to back. The right rear is on the ground.
BFL13 05/23/22 08:02am Truck Campers
RE: SiO2 Batteries and High Amp Draws

IMO you don't need "hands on experience", but you do need some ability to "critical read". PT can do that same as the rest of us. So far my experience with SiO2 shows they do the depth of discharge as claimed, but I have not confirmed much of the other data claims. You have to distinguish between data sheet stuff and dealer sales claims, which we all are able to do too. Looking at Azimuth dealer claims trying to sell SiO2s, eg they push the cold weather operating range as -40C. But Stark brand AGMs also claim -40C to 60C operating range, so what is so special about SiO2 in the cold? Beats me. Would have to do more research if I cared. http://www.wegosolar.com/products.php?product=SKR%252d125AGM-Stark-AGM-12V-Solar-Battery-Sealed-125A Speaking of "sales" note that is really a 105AH batt at the 20 hr rate. Another trick is if they use the 10 hr rate like ISTR SiO2 does in some blurbs. Got to pay attention! Claim is "faster charging" with SiO2. That is where I always want to see the actual charging profiles with times etc for a side by side comparison. Usually you see that faster charging has to do with a lower internal resistance. Maybe. Sometimes they mean you can use a higher amp charging rate and that makes for less time. But if you use the same 55 amp charger it will do 55 amps and no more in each case. So the SiO2 spec says IR is "under 6.8 mOhms". The Stark AGM says 5 mOhms. So how can the SiO2 be faster? But these IRs are at 77F. We don't know the IRs at different charging rates and where along in SOC the IRs are. Makes you wonder how the SiO2 could be "faster" They both have charging limits of about 27% so you can't use a bigger amp charger to get a faster time like you could with LFP, eg. So here is their claim for "faster charging" https://azimuthsolar.ca/wp-content/uploads/2019/11/Azimuth-Silicon-Dioxide-4-Pager-min-1.pdf 2 x faster! 3 hrs vs 6 hrs . So how far down in SOC is the starting point where you can charge it up to what SOC ? "Regular" 100AH batts take a very long time to get from 90 to 100% SOC. On generator (their sales pitch for less gen time) you stop the charge at 90 anyway. So what is the comparison in time for doing 50-90s? Seems like a bogus sales claim to me! It could turn on where along in SOC it goes from constant amps to tapering amps. That is why we need the charging profiles to compare them. Anyway, I will check for that with my SiO2s and see how it goes. I do think the data sheet stuff can be believed but you have to watch out for those "sales" guys. :( (and that is just as true for LFP ads on "faster charging" with no side by side charging profiles)
BFL13 05/23/22 07:28am Tech Issues
RE: how to replace the charger inverter in a four winds

I prefer a deck mount instead of replacing the lower portion (MBA ) with another. Good price here - note the shipping too https://www.boatandrvaccessories.com/products/powermax-pm3-60lk-12-volts-60-amp-power-converter-battery-charger-w-led-light?_pos=4&_sid=a37eb4405&_ss=r There are other choices of course. For the monitor that shows amps, there are many of them too. I have a lower cost one called "Renogy 500Amp" that shows amps and volts like you want for charging AGMs--or any other battery type. BTW you don't have to yank your existing converter and put the deck mount in there. A deck mount can go anywhere handy--closer to the batteries the better. Does need 120v for it near enough for its power cord to reach.
BFL13 05/22/22 10:50pm Tech Issues
RE: SiO2 Batteries and High Amp Draws

High draw per capacity ability and higher charging efficiency are different things LFP has both; SiO2 has the first, not so much of the other AFAIK but will know when I plot a charging profile
BFL13 05/22/22 07:13pm Tech Issues
RE: Twisted Truck? UPDATE-Fixed!

It was Grit dog at 0825, now showing on mine. Whatever works! :)
BFL13 05/22/22 06:43pm Truck Campers
RE: SiO2 Batteries and High Amp Draws

Actually have almost no info on LFP charging profiles. To understand your data above, would also need the charging voltage and whether it reached that when tapering started. Sometimes tapering starts "early" as was seen with PD some PD converters not holding constant amps in Bulk, and is not related to the classic Bulk/Absorption transition. There is a need for some plotting and graph making to get the picture clear. :)
BFL13 05/22/22 05:50pm Tech Issues
RE: SiO2 Batteries and High Amp Draws

Yes they survived a year of floating ok. With one I had to use the 20 amp setting on a Vector charger but with two I can use the 55 amp converter I see that Alberta LFP says 60 amps limit so would need the 55 amper and not use my 75 amper. I guess it has the under-sized BMS you guys were talking about
BFL13 05/22/22 04:48pm Tech Issues
RE: SiO2 Batteries and High Amp Draws

I got the SiO2s in late 2020 Seldom used since with covid reducing dog events. Took the TC out myself the other day to see that it all still works now things are starting up again
BFL13 05/22/22 02:29pm Tech Issues
RE: how to replace the charger inverter in a four winds

Please clarify your terminology. You likely have a "converter", not an "inverter/charger" . There is no such thing as a "charger inverter" You likely have a single stage (13.7ish volts) Parallax 7300 converter in the 2006 Class C, or perhaps an Iota or PD or WFCO version of the same thing. You can't meet the AGM battery charging specs with the plain version of one of those. You will need a charger that can do 14.4 volts and you will need ammeter to measure when charging gets down to 1/2 an amp per 100AH of battery. Easiest way to do that is with a battery monitor that shows amps.
BFL13 05/22/22 01:52pm Tech Issues
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