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 > Your search for posts made by 'S Davis' found 68 matches.

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RE: Lithium Battery Charging System

I see you're taking compression pretty serious. I started out compressing, but after looking into it a bunch, it seems compression is of only some minimal benefit to longevity. With the lesser cycle cells, you'll get some marginal extra life, or with used B or C grade cells. The K cells will last 17 years even if you mildly abuse them. If you really take care of them and constantly keep them in the 60-80% range, they are estimated to last 32 years. And that's without compression. Not saying compression isnt correct and I know the manufacturers have always recommended it, I just can't see going through the hassle with these new LFK cells. The latest LF280K are 3500 cycles without compression and 6000 with, I would say that’s a little more than minimal. If you don’t restrain them I would suggest you keep a real close eye on your cell connections or go flexible buss bars because of the expansion and contraction of these cells. I have 640 lbs of compression on mine per the manufacturer and they still expand and contract with state of charge. ETA: Also these are in a off road 4x4 and I can’t have them bouncing around, these mount on rubber isolators as well. https://i.imgur.com/yNIlH88l.jpg
S Davis 08/01/22 06:25pm Truck Campers
RE: Your Opinion On Air Bags

A lot depends on your springs, are the overloads engaged when loaded up? One thing is if your springs are too weak and you have to pump the bags up so much to level the truck that you unload the overloads you will be bouncing down the road. I see a lot of people asking what pressure to inflate their bags to and it all depends on your individual set up/ how much support is needed and when your set up lifts off the overloads. Probably will not help with sway.
S Davis 08/01/22 03:56pm Tow Vehicles
RE: Lithium Battery Charging System

The new EVELF280K cells are rated to 6K+ cycles. Building a pack of Four of these cells will provide longer service than any Lead acid. Combined with 3 or 400+ watts of panels, it's a no brainer. After doing the requisite research and getting past the initial, kinda-steep learning curve of DIY LFPs and now that I've built one, the cost to energy density ratio is clear. You can keep watering your cells. I'm done with that ****. when was the K edition released, at 6K cycles going down to 10V from full is a game changer again. double the life at 100% usage and only 600ish us for a set of 4. I like the way they adresses the bolting also. nice set up. The LF280K have been around for about a year, I purchased the LF280N the previous version last year. https://i.imgur.com/UXyYhqgl.jpg how has your daily BMS been doing, I went with Overkill solar BMS as the dailys were having some issues at the time, or was that just blowen out of proportion like the internet usaly does? Steve The first two are working fine except for the SOC I sn’t accurate, I went around and around with Daly but could never get the PC software to work to change their sensitivity, they don’t register a draw below about 3 amps. I am putting together 8 packs so far and have switched to Overkill BMS for the next couple to try them out. https://i.imgur.com/AFOH5Ull.jpg
S Davis 07/31/22 11:25am Truck Campers
RE: Lithium Battery Charging System

The new EVELF280K cells are rated to 6K+ cycles. Building a pack of Four of these cells will provide longer service than any Lead acid. Combined with 3 or 400+ watts of panels, it's a no brainer. After doing the requisite research and getting past the initial, kinda-steep learning curve of DIY LFPs and now that I've built one, the cost to energy density ratio is clear. You can keep watering your cells. I'm done with that ****. when was the K edition released, at 6K cycles going down to 10V from full is a game changer again. double the life at 100% usage and only 600ish us for a set of 4. I like the way they adresses the bolting also. nice set up. The LF280K have been around for about a year, I purchased the LF280N the previous version last year. https://i.imgur.com/UXyYhqgl.jpg
S Davis 07/30/22 01:14pm Truck Campers
RE: Lithium Battery Charging System

Sounds to me like you blew a fuse or fusable link to the batteries when you hooked them up backwards, I would make sure your main battery switch is on and check the fuses.
S Davis 07/25/22 11:29am Truck Campers
RE: Question for those with an Auxiliary diesel fuel tank

I was worried about gravity flow through a water separator so I decided to just add a pump, it is on a 30 minute timer and will transfer about 18 gallons. The tank had condensation in it when I got it so I was more worried about moisture than debris. https://i.imgur.com/qtrEtHPl.jpg
S Davis 07/23/22 11:08am Tow Vehicles
RE: What did you do to your truck today?

Finished the aux bed tank install, got three more holes through the cab floor with water tight connectors, one for the 14/2 to the fuel pump and two extra for 10 gauge so cord for 120 volt 30 amp in and out for the 2800 watt inverter. Wired the pump timer to the pump and to the low voltage fuse panel in the cab, twist the timer for 30 minutes and it will transfer about 15 gallons and shut off. https://i.imgur.com/Mau4wi6l.jpg https://i.imgur.com/nAZ2gkcl.jpg https://i.imgur.com/zJwp5eDl.jpg
S Davis 07/04/22 04:29pm Truck Campers
RE: More on LFP Charging

My EVE LF280N cells are rated at 3500 cycles from full charge to 2.5 volt cut off and that is at 1.C in a compression fixture. I am not to worried about charging them up to 100% SOC and using the full capacity. From what I understand if you draw your battery down 20% and then charge it back to 100% that is only 20% of a battery cycle. At 3500 cycles I think for most users they will age out before cycling out, I think there are many more factors that will affect cell life more than using the manufacturer stated capacity. https://i.imgur.com/QOUDoyyl.jpg
S Davis 06/30/22 02:35pm Tech Issues
RE: Fuel cost in your area

80 gallons diesel last fill up, $495.20
S Davis 06/30/22 02:10pm General RVing Issues
RE: Where have all the members gone on this forum?

Part of the issue is some one new posts and it turns into a 12 page argument, seems like people can’t agree to disagree anymore. Facebook, other forums and grumpy old men would be my answer.
S Davis 06/21/22 10:43am General RVing Issues
RE: What did you do to your truck today?

Installed a 51 Gallon aux tank for a total of 87 gallons. https://i.imgur.com/swwIVJjl.jpg https://i.imgur.com/om7gbSjl.jpg https://i.imgur.com/APcxKj8l.jpg Nice clean install! But why all the extra parts and filter? Not down with gravity fill? What’s the top line off the tank for? I wanted a filter to catch the condensation from the metal aux tank before going into the main tank, and while I was at it decided to add a pump. It is on a 15 minute timer and will pump a little over 7 gallons before shutting off. The pipe on top is a vent with roll over valve.
S Davis 06/17/22 01:22am Truck Campers
RE: Anyone Cancelling Truck Camper Trips Due to Fuel Prices?

No ,added a extra 51 gallon tank. Instead of using my commercial supplier I am shopping around. https://i.imgur.com/ejl4yu0l.jpg 87 gallons@ $5.85 last fill up, contractor I work with just paid $6.40 in Bellinham WA.
S Davis 06/12/22 11:13am Truck Campers
RE: Will a 3/4 ton do

Well you don’t have to be real bright to know when you are over tire capacities, but I guess that doesn’t mean much to some.
S Davis 06/10/22 06:36pm Tow Vehicles
RE: Will a 3/4 ton do

If you like messing with your vehicles go 3/4 ton, I towed a 14,000lb gooseneck with a 2013 2500HD and had to add helper springs, upgraded shocks and upgraded tires. My pin weight was over 3000lbs. And yet aside from spring rate, the trucks are the same. Hence the helper springs. The other 2 items you’re claiming are just for effect, since 1 ton srw trucks are available with the same wheels and tires as 3/4 tons and shocks, well, 90% of factory shocks are less than stellar and they have no bearing on load carrying capacity. Nice try though. I’ll give you the shocks even though they can make the difference between a good towing experience and not. I have an issue overloading tires I guess you don’t? My factory tires were 6400lbs and hooked up the rear axle was about 7000lbs.
S Davis 06/09/22 09:41pm Tow Vehicles
RE: Will a 3/4 ton do

If you like messing with your vehicles go 3/4 ton, I towed a 14,000lb gooseneck with a 2013 2500HD and had to add helper springs, upgraded shocks and upgraded tires. My pin weight was over 3000lbs.
S Davis 06/07/22 08:42pm Tow Vehicles
RE: LiFePo4 voltage under load

BFL says: “IMO the real LFP figures in the OP graph should only go to the "knee" and use about 12.5v as the "end voltage". That would make the times approx” Fair enough, but consider too that in actual practice 12.5v occurs somewhere below the chart’s stated 10% SOC - in my case this works out to around 97ish % DOD… 3 tons I run mine down to about 12.4 on each charge cycle and just let my Redarc re-charge until it goes into float.
S Davis 06/04/22 05:02pm Tech Issues
RE: What did you do to your truck today?

Installed a 51 Gallon aux tank for a total of 87 gallons. https://i.imgur.com/swwIVJjl.jpg https://i.imgur.com/om7gbSjl.jpg https://i.imgur.com/APcxKj8l.jpg
S Davis 06/04/22 04:12pm Truck Campers
RE: Lance TC - lithium - DC-DC charger question

I have pulled 50 amps at idle with my 220 amp alternator every day now for almost a year with no issues.
S Davis 05/20/22 10:35am Truck Campers
RE: Seeking Airbag Advice for Lifted F150/TC650

Air bags will not do much if your springs are maxed out, one thing you do not want to do is unload your overload springs it will make it feel like driving on a beach ball. If you are slightly over loaded they can level the load and provide a little support and work fairly well, if too overloaded they will make things worse. I would look at helper springs.
S Davis 05/16/22 11:16am Truck Campers
RE: Lance TC - lithium - DC-DC charger question

I use a 50 amp Redarc dc/dc charger on my 2019 Chevy (this system is in the rear of the crew cab) charging a pair of 280ah LifeP04, I ran a set of 1/0 DLO cables from the fuse block on the secondary truck battery to a set of 600amp buss bars in the cab and from the buss bars to a lift gate plug in the bed. I can either power the plug from the truck alternator( I plan on another dc/dc charger in the camper) or the 560ah battery bank. My truck has a high output alternator, it has the snowplow prep option with a 220amp alternator.
S Davis 05/16/22 11:00am Truck Campers
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