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 > Your search for posts made by 'BFL13' found 2018 matches.

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  Subject Author Date Posted Forum
RE: 400 Watts of Solar for $37 ?

I don't know about some of you folks. Ebay and PayPal both have ways and means of refunding your $40.00 if the deal goes belly up. I ordered one and am expecting delivery on April 10th That is the weekend after Easter, so you can ask the Easter Bunny when you see him (or her!), if the solar will be on time for the next week :)
BFL13 03/03/15 01:10pm Tech Issues
RE: Why won't my inverter put out?

Does that freezer work on the MSW inverter now? If so, then the next thing is to see if the van's alternator can support the inverter with that freezer as the load. It was unclear last time why the freezer tripped the inverter.
BFL13 03/03/15 01:04pm Tech Issues
RE: ST Tire "Plies" Question and a PSI Question

(snipped) OK, so what happens when one tire on one side goes flat? The other tire has to take that one side's whole weight. Does not mean for sure that is one half, because the two on that side might not be the same. Usually they would be the same of course. (snipped) Not necessarily. The equalizer between the axles allows the wheel with the flat to drop to the ground, so it's still carrying weight, almost the full weight as if it was not flat, so it should =not= overload the same-side tire on the other axle. If this weren't so, then every time you went over a speed bump in a campground, you'd overload each tire as you went over the bump. If a tire company is telling you that you need to replace the other tire due to an "overload", that's just so they can sell you another tire, and laugh all the way to the bank, IMO. Lyle I did note after getting parked off the road, that while the shredded tire was on the ground (rim almost was, but enough tire remained so the rim was not damaged), the other tire that side was "showing" it had more weight on it than usual by being bulged at the bottom somewhat. I suppose that means it was holding up more weight than usual but not necessarily double the normal weight as indicated above with the equalizer. So the situation could depend on how long you had to go at what speed on that one tire before you could get off the road as to how much damage was done to the other tire. Just more to toss into the total mix of circumstances while figuring what to do.
BFL13 03/03/15 10:35am Fifth-Wheels
RE: Why won't my inverter put out?

The reason to do it this way is so your trailer battery gets the constant amps in bulk profile and to the 14s with the Vector, but would be stuck at 13.8v and tapering amps doing it just by jumper cables or 7-pin truck to trailer Plus I get the MULTI-LAYERED CHARGE PROFILES ;). But, seriously, why would the jumper cables mean tapering amps? Edit: Dang. New page. Please see the new info and answers to you lovely people's questions on the previous page. Jumper cables and 7-pin are stuck at alternator 13.8v constant voltage. Amps taper with any constant voltage, called the "Absorption Stage" of charging. 13.8 is not much more than 12.8 so there is not much "spread" between charger and battery voltages either, and the more spread the more amps you get, tapering or not. So the ideal is to charge at the 14.8v level and get some bulk charging going with constant, high, amps with battery voltage rising to 14.8--and then hold that 14.8 while amps now taper. What smart chargers are supposed to do. You can't do that charging profile with alternator charging. You can get a special attachment to the alternator that is like a smart charger that will do that charging profile. They do that in expensive boats.
BFL13 03/03/15 10:11am Tech Issues
RE: Why won't my inverter put out?

BFL, In that case, yes, the OP needs to do whatever to keep the voltage up. I plan to wire my bus for charging on the go, so I'll need to know what kind of voltage to expect. There are some past threads about alternator charging. ISTR Mark or one of those guys wired up for that to a truck camper with success. There is something about wiring to the alternator itself to by-pass the part where it drops its voltage at the starting battery, but I can't see any place on my alternator where to attach anything. Not a clue. I don't have to deal with that.
BFL13 03/03/15 10:02am Tech Issues
RE: ST Tire "Plies" Question and a PSI Question

Again, we have had numerous reports of the second tire on the same side fail within limited miles of the first one!!!!!!!! Chris When my tire actually shredded this time I replaced them all. Being 12 years old, I figured another one would go soon and my time on these had run out. (in fact I went too long as that proved) However, if I had a puncture on one much newer set of tires, I would just get that fixed and keep the other tires as is. So it depends on what kind of shape and age the other tire is before I would buy two "just in case" I have had a few punctures but never had one shred like that before. I think any tire good or bad quality can get a puncture, but if one of a newer set of tires shredded I would wonder about the others true quality. Perhaps that is what some of these different opinions turn on where people are not talking about exactly the same thing, hard to tell. Nobody is a crazy risk-taker here so it is all about situations. If you did buy two, I suppose they should both go on the same axle and the two older ones would be on the other axle so that would mean a shuffle. The spare would already be on where the punctured one was. My spare is the old ugly wheel so it has to go back as the spare but if the spare wheel looks like the others it could stay there as part of the shuffle. You would have to draw yourself diagrams to get it all figured out what to tell the garage you want! :) In my case the spare was previously patched (cut by a sharp rock type of puncture, not just a nail hole) and chosen to be the new spare back then, so I had that tire tossed and the best of the three other old ones is now the spare on the ugly wheel.
BFL13 03/03/15 09:16am Fifth-Wheels
RE: Why won't my inverter put out?

I was running a 600w 35a Vector (with a 1000w inverter) at 35a to the trailer battery with the truck battery voltage holding at 13.8ish (needle holding pointing up) truck idling for over an hour. With the losses, I think that means the alternator would have been doing more than the 35a the charger was doing? The reason to do it this way is so your trailer battery gets the constant amps in bulk profile and to the 14s with the Vector, but would be stuck at 13.8v and tapering amps doing it just by jumper cables or 7-pin truck to trailer
BFL13 03/03/15 08:50am Tech Issues
RE: Why won't my inverter put out?

BFL, If alternator voltage drops to 13.8v, as you say, then should it jump back up to 14.5v once charging the agm's is resumed? AFAIK (not far on this) the alternator goes by the starting battery state, alternator temperature, etc and stays there. So when you add a load like house battery or 7-pin charging, you don't get any more than that 13.8 voltage.
BFL13 03/03/15 08:13am Tech Issues
RE: Cable size for 160W portable solar panel

Solar controller needs air-it gets warm- so don't put it in a plastic bag :) You can get the kind that you can leave out in the rain. Most need to be kept dry.
BFL13 03/03/15 07:59am Tech Issues
RE: Sizing a replacement converter

That is what this ugly graph does. You can see the reduction in generator run times for a 50-90 by going to a higher amp charger. Diminishing returns. Going from 35 to 55 makes more of a difference than going from 55 to 70. (eyeball values in between) This can be useful when deciding whether to get a more expensive higher amp converter. How many minutes saved is worth it? Only you know what is worth it to you. http://i58.tinypic.com/xlwjzo.png
BFL13 03/03/15 07:52am Tech Issues
RE: Why won't my inverter put out?

When you first start the vehicle with a fairly full starting battery, voltage jumps to 14.5ish but very quickly drops and settles at 13.8ish, at least with my truck. The inverter on the starting battery trick is to see how much load you can put on the inverter while the vehicle's voltage holds at that 13.8ish. Turn off vehicle loads like climate control. Happens sharply with adding load. "Last straw" effect. Then dash voltage needle goes from straight up, but shaking a bit, to quickly dropping off to the left. Remove some inverter load and the needle goes back to "up" That is your inverter load limit.
BFL13 03/03/15 07:34am Tech Issues
RE: Why won't my inverter put out?

Once you have shore power, where the house batts are getting charged, try that inverter clamped on the house batts and the freezer as only load. This should resolve whether that freezer needs PSW or if it can run on MSW but just needs enough DC input to the inverter. I'm worried that would kill the house battery. I have previously killed several 66aH agm batteries with brief 100amp loads, before I figured out I needed bigger batteries for that job. I think someone upthread said the freezer could have a 600amp startup surge? A 600amp draw would equate to a 6000w surge. Doubt that! Won't kill the battery anyway. That is what the inverter shut off at 11v is for. It protects the battery from being drawn right down.
BFL13 03/02/15 07:17pm Tech Issues
RE: ST Tire "Plies" Question and a PSI Question

Not too clear here. You have the "issue" of needing the same sort of tire on each end of the same axle, in conflict with the "issue" of one tire on the same side of the trailer, but on a different axle of course, taking all the weight when the other tire on the same side fails. To clarify, the tires on either end of the same axle have to be the same, but the tires on the other axle don't have to be the same as that, but they do have to be the same as each other. OK, so what happens when one tire on one side goes flat? The other tire has to take that one side's whole weight. Does not mean for sure that is one half, because the two on that side might not be the same. Usually they would be the same of course. Good expert info coming in here and I am learning a lot as I am sure are others. Just trying to keep things straight.
BFL13 03/02/15 07:10pm Fifth-Wheels
RE: Why won't my inverter put out?

After running the van 30 minutes with no load, to charge the chassis battery, i hooked up the inverter with a load it is comfortable with. Chassis battery now reads 13.87 on handheld voltmeter. Was about 14.5 when charging and no load. Comments? All is good same as before. You only run into trouble when you load the inverter past what the van alternator can support.
BFL13 03/02/15 06:57pm Tech Issues
RE: Why won't my inverter put out?

Once you have shore power, where the house batts are getting charged, try that inverter clamped on the house batts and the freezer as only load. This should resolve whether that freezer needs PSW or if it can run on MSW but just needs enough DC input to the inverter.
BFL13 03/02/15 06:54pm Tech Issues
RE: Cable size for 160W portable solar panel

IMO rip the 10a controller off the back of the portable panel set and use the existing 30a controller to run the new panels as well as the roof top ones so you have 320w when doing that. You can have 160 on the roof and 160 on the ground doing that. Just need access to the controller for the wires from the ground panels like through the cargo bay, whatever. If just using the 160w portable with the other trailer, mount a new 20a controller from eBay ($15 ?) near the batts and some #8 from it to the batts. Use #8 or better from panel to controller. Eg I use #8 or better jumper cables out to the portable panel. If too far I use more sets of jumper cables clamp to clamp. It all gets the job done.
BFL13 03/02/15 05:22pm Tech Issues
RE: ST Tire "Plies" Question and a PSI Question

I think the rear stabilizer near the rear tire that was flat is what made it look normal. The puncture could have happened anytime since the last PSI check, but when I parked I didn't notice the flat before putting down the stabilizers so it may not have been so far down in PSI while still on the road before parking. I don't know how much air has to be lost before it really "shows"
BFL13 03/02/15 03:31pm Fifth-Wheels
RE: Why won't my inverter put out?

So, who makes a better inverter? Any tips on finding one in a small town? With a good inverter, can I safely run the freezer off my alternator for a couple hours? Separate the two limitations. You can have a 3000w inverter on the van's battery (with the engine running of course) and your limitation is still the van's 12v system. The alternator can hold the van's voltage, but only up to a certain inverter load and then the van's voltage will collapse. That inverter load is the same (say it is 600w) whether you use a 750w inverter or a 3000w inverter, the van will only carry the 600w. Ok, that leads to two questions: Can I find out my van's limit for alternator safety other than by trial and error? And, when the van is not involved - when running inverter off house battery - why does inverter dislike laptop charger? I found out by trial and error. Just add loads until the van can't take anymore (watch the dash voltage gauge drop to the left when that happens) You can't hurt anything if you don't leave it like that very long, as all that means is you are now drawing down the starter battery until you turn off the inverter. there may be a strain on the alternator then but it would only be for a couple minutes till you stop the trial. Same as having the lights on with the engine off in a way, only it takes less time for the battery to go flat :) The house batteries are on their own with no alternator? So their voltage will drop same as the engine battery with the engine off as above. The laptop itself should run on the inverter ok, no MSW vs PSW problem. (Electric blankets fry with MSW I hear. Not sure. Most things run on MSW but some things just won't-- a modern sewing machine eg won't-it needs PSW) A Laptop is about 60w so should pull 6 amps approx. 6 amps is not much of a draw, but it can make a goodly voltage drop amount on a "weak" battery. So the house battery bank may be small or already run down some, so the 6a draw pulls its loaded voltage to 11v and the inverter alarm sounds.
BFL13 03/02/15 11:01am Tech Issues
RE: Another battery question

I ran the fridge and LP alarm etc when we were away from the rig a few days. Daytime ambient about 80F. Trimetric showed a draw of 51AH for the three days so daily was 17AH. The standing draw is 0.3a and the fridge burner draws 0.5a so when the fridge comes on the draw is 0.8a. 24 hrs of 0.3 is 7.2AH so the fridge took another 10AH. 24 x 0.8 = 19 AH. That means the fridge was on 10/19 x 24 = 12.6 hrs out of the 24.
BFL13 03/02/15 10:35am Tech Issues
RE: Why won't my inverter put out?

So, who makes a better inverter? Any tips on finding one in a small town? With a good inverter, can I safely run the freezer off my alternator for a couple hours? Separate the two limitations. You can have a 3000w inverter on the van's battery (with the engine running of course) and your limitation is still the van's 12v system. The alternator can hold the van's voltage, but only up to a certain inverter load and then the van's voltage will collapse. That inverter load is the same (say it is 600w) whether you use a 750w inverter or a 3000w inverter, the van will only carry the 600w.
BFL13 03/02/15 10:23am Tech Issues
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