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 > Your search for posts made by 'S Davis' found 64 matches.

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RE: Lithium batteries

“I could just take the two 4s BMS off and use a 100amp 8s BMS that turns all 8 cells into one battery instead of two in parrelell.” Except you just made a 24 volt battery with a 8-S BMS. Eight cells in series makes 25.6 volts. To stay at 12 volts and up the ah you would have to use a 4-S BMS and use parallel sets of cells. The draw back is not being able to monitor each cell in the battery. true, you would be monitering groups of cells, but if you get quality cells that are matched, thats not an issue. I still recomend building seperat batteries unless you want to go to a higher capacity and use a stepdown. but in my case I would do another 310AH battery and have two of them. so when I am using my camper I would just use one as thats 10 days camping with the furnace running 24/7, but for my 5th wheel I could have two in there and just move one back and forth between the 5th and the camper. one will give me more usable capacity than I have with my four 6V batteries so it will be fine when I am using the camper, but when I am going for a longer dry camping backwoods with the 5th wheel I can put the second in and double my capacity. being only 48lbs its not a big deal either. That is what I did, I have almost 2000ah in seven 12 volt 280ah batteries. I have two in my work truck with a few spares. https://i.imgur.com/vmZmWvDl.jpg
S Davis 12/01/22 12:44am Tech Issues
RE: Lithium batteries

“I could just take the two 4s BMS off and use a 100amp 8s BMS that turns all 8 cells into one battery instead of two in parrelell.” Except you just made a 24 volt battery with a 8-S BMS. Eight cells in series makes 25.6 volts. To stay at 12 volts and up the ah you would have to use a 4-S BMS and use parallel sets of cells. The draw back is not being able to monitor each cell in the battery.
S Davis 11/29/22 03:01pm Tech Issues
RE: DC to DC charger

That is not true on newer GM HD trucks, my 2019 Chevy 2500HD sits above 14 volts, when changing my batteries it will ramp up to just above 15 volts @ 50amps. According to the above statement I should have a smart alternator, but I have yet to see this mysterious lowering of voltage a few people on here keep stating. Check the voltage at the starting battery immediately after starting and at the house battery. Drive for 10-15 minutes and, with the engine still running, check those voltages again. I have voltage meters, they stay constant above 14v and if the LifeP04 are charging it’s highe.
S Davis 11/28/22 10:24pm Truck Campers
RE: DC to DC charger

... on newer GM HD trucks, my 2019 Chevy 2500HD sits above 14 volts, when changing my batteries it will ramp up to just above 15 volts @ 50amps. 15+ volts is all the more reason for a DC to DC Charger. I don't think Lithiums will agree with that high of a charge voltage. I am using a 50amp DC to DC charger.
S Davis 11/28/22 10:17pm Truck Campers
RE: DC to DC charger

What I have not seen posted is the fact that even if you use like chemistry batteries in the camper and truck, the capacity and age of the different batteries also affects charging (in addition to the small gauge trailer plug wiring). When you look at the diesels with dual start batteries, they have to be changed out in matched sets to keep optimal charging and power delivery (discharging). Putting in a DC to DC charger helps overcome these differences. My two lifePO4 (560ah) will charge at 50 amps until they are almost completely charged with the low internal resistance unlike lead acid or agm.
S Davis 11/28/22 02:10pm Truck Campers
RE: DC to DC charger

I just use a pair of 8 gauge wires from the truck battery to the camper batteries. That eliminates the voltage drop of the 7 pin and puts a nice charge into the camper batteries whenever I drive. I use a 200 amp blade switch that is mounted on the truck battery to isolate the truck battery when the situation calls for it, but that is rare. The reason it’s working for you , and also for me , is the age of the truck . Newer trucks , last decade , have smart charging , meaning as soon as the starting batteries are satisfied charging goes way down , so the house batteries would get very little , especially with the voltage drop. That is not true on newer GM HD trucks, my 2019 Chevy 2500HD sits above 14 volts, when changing my batteries it will ramp up to just above 15 volts @ 50amps. According to the above statement I should have a smart alternator, but I have yet to see this mysterious lowering of voltage a few people on here keep stating. So maybe Ford and Ram do but my 2013 and 2019 Chevys don’t or if they do the alternator is smart enough to ramp up under heavy load.
S Davis 11/28/22 11:21am Truck Campers
RE: CAT 3126E acceleration power loss after fuel filter change

Could something have gotten on your MAF sensor when you changed the air filter?
S Davis 11/26/22 11:39am Tech Issues
RE: Aqua-Hot in Cold Weather - Issues with Performance?

It could be as simple as improperly set combustion, when everything was changed was the burner combustion checked? Is it only in the cold when it fails and what altitude were you at?
S Davis 10/27/22 11:23am Tech Issues
RE: Honda 2000 won’t run my late model home furnace

Has nothing to do with the fuel source, .Has everything to do with the fuel if it's electric. Furnace implies it burns fuel. Otherwise it would be an electric heater and 2000w is no where close to enough for a whole house electric heating system. As others have mentioned, it's nothing to do with the sine wave but with the grounding. Could be oil fired, they draw more power for the burner.
S Davis 10/07/22 04:13pm Tech Issues
RE: What did you do to your truck today?

My factory tires on my 2019 Chevy were needing replaced so I upgraded to 245/70/19.5 tires, I also got the bulkhead installed to protect the aux diesel tank I installed not to long ago. https://i.imgur.com/qTu6dihl.jpg https://i.imgur.com/ImWWs2gl.jpg
S Davis 09/18/22 01:23pm Truck Campers
RE: Lithium crossing the acceptance threshold…

Ya, good luck with that. There will always be those that because LifeP04 has different operational requirements will use that as an excuse that they are no good. It is different and scary.
S Davis 09/14/22 11:17am Tech Issues
RE: Diesel Ram Owner Forced to Scrap Truck !

I deleted and raced a 2009 Duramax for a couple years, we kept the original ECM and all the emission parts to be reinstalled.
S Davis 09/13/22 06:47pm Tow Vehicles
RE: 19.5 Hankook DH35 vs XDS2

My 19.5's do well on Stevens Pass and wear better than any LT tire I owned. I had the same experience with the Toyo M608, they were the best winter tire I have used.
S Davis 09/01/22 11:05am Truck Campers
RE: 19.5 Hankook DH35 vs XDS2

Ok thanks, I will probably check with a few more places.
S Davis 08/29/22 05:21pm Truck Campers
RE: 19.5 Hankook DH35 vs XDS2

I pulled the trigger on another set of the XDS’s. Couldn’t find any first hand info on the DH35’s, so went with what I know. I appreciate the responses. What was the cost? I just got a quote for XDS2 for $677.00 per tire. I was thinking about going with the Toyo M608z again but they had over 1000 back ordered.
S Davis 08/29/22 04:45pm Truck Campers
RE: GMC TPMS

I don’t know if they are the same system but on my 2009 we raced the truck and ran tire pressure as low as 20psi, I had the dealer reset the tire pressure settings in the TPMS so we wouldn’t get the dashboard warning.
S Davis 08/08/22 10:29am Tow Vehicles
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
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