DC to DC charger
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โSep-01-2022 01:34 PM
Thanks, Jeff D
2020 Arctic Fox 865 short bed
2021 Nitro Z18
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Truck Campers
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โNov-17-2022 09:23 AM
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โOct-27-2022 08:08 AM
pianotuna wrote:Reisender wrote:
Iโm not sure what the source is here. Is it the trucks 12 volt system you want to use to charge the truck campers battery? Why would you need a DC to DC converter for that. That is what the trucks charge line is for on the 7 pin. What am I missing?
We use a DC to DC converter but it is from one static battery bank to another. So no alternator etc.
My oem and additional charging circuits worked well for lead acid. But when I changed to telcom, I got no charging from the alternator unless something such as the microwave was running.
I've added a dc to DC 20 amp charger, and I'm seeing up to 19.6 amps going into the house bank. I started a thread with my observations.
Interesting. Thanks Don.
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โOct-27-2022 06:55 AM
Reisender wrote:
Iโm not sure what the source is here. Is it the trucks 12 volt system you want to use to charge the truck campers battery? Why would you need a DC to DC converter for that. That is what the trucks charge line is for on the 7 pin. What am I missing?
We use a DC to DC converter but it is from one static battery bank to another. So no alternator etc.
My oem and additional charging circuits worked well for lead acid. But when I changed to telcom, I got no charging from the alternator unless something such as the microwave was running.
I've added a dc to DC 20 amp charger, and I'm seeing up to 19.6 amps going into the house bank. I started a thread with my observations.
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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โOct-26-2022 08:35 PM
StirCrazy wrote:Reisender wrote:
Iโm not sure what the source is here. Is it the trucks 12 volt system you want to use to charge the truck campers battery? Why would you need a DC to DC converter for that. That is what the trucks charge line is for on the 7 pin. What am I missing?
We use a DC to DC converter but it is from one static battery bank to another. So no alternator etc.
the 7 pin wire is small, lots of voltage drop. so if your altanator is putting out 13.5V, just to pick a number, by the time it is down at your rv batteries it could be in the 12's, also unless you buy a battery isolater the rv can suck down the truck batteries if you leave it plugged in. I believe newer vehicles may come with that but the wires are still to small.
a dc to dc charger mounts as close to the battery as you can, and you run a new wire, or use your 7 pin, directly from the truck battery to the DC to DC. the charger then turns what ever it is getting into a proper voltage for your batteries. as a bonus it also isolates your truck batteries from the rv batteries so you cannot drain your truck down.
if you use the 7 pin charge line to feed it the inlett amps will be up to 50% higher than the ouput amps, the reason to run a larger wire on a plug is to lower that difference by making less voltage drop on the feed.
so you can also set the charging profiles on the dc to dc charger so if you have deep cycle batteries it will get the best charge as aposed to what ever the starting batteries in the truck get. same goes for gel and Li.
I am installing on in my camper in the spring, this will let me have a emergency source of power for charging if I hit a ton of dark days when I am lait fall/early winter camping. my solar handles everything but last year I saw three days of rain and dark and I was hitting the 50% mark on y deep cycle from running the furnace all the time. I have a 10 day cussion now with the LiFePO4 cell I built but, with the dc tyo dc, in 1.5 hours I can recover 24 hours power use if I need to.
Thanks for the explanation. That all makes sense. I didnโt think it would be a problem with the drop from the alternator but yah. I get it.
We use ours very rarely. When we are dry camping we have a little 2000 watt propane generator we use for keeping the battery up on our little trailer if the solar conditions are bad. (Meaning shady sites etc). But we have stayed at a no generator campground a couple times. We plugged into the 12 volt receptacle in the trunk of the Tesla which kicks out 13.6 volts and then set the DC to DC converter to 14.4 volts to trickle charge the trailer battery for half a day. Got us thru the last couple of days of a camping trip. Handy devices.
Thanks again for the explanation.
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โOct-26-2022 05:37 PM
Host Mammoth 11.5 on Ram 5500 HD
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โOct-26-2022 05:04 PM
Reisender wrote:
Iโm not sure what the source is here. Is it the trucks 12 volt system you want to use to charge the truck campers battery? Why would you need a DC to DC converter for that. That is what the trucks charge line is for on the 7 pin. What am I missing?
We use a DC to DC converter but it is from one static battery bank to another. So no alternator etc.
the 7 pin wire is small, lots of voltage drop. so if your altanator is putting out 13.5V, just to pick a number, by the time it is down at your rv batteries it could be in the 12's, also unless you buy a battery isolater the rv can suck down the truck batteries if you leave it plugged in. I believe newer vehicles may come with that but the wires are still to small.
a dc to dc charger mounts as close to the battery as you can, and you run a new wire, or use your 7 pin, directly from the truck battery to the DC to DC. the charger then turns what ever it is getting into a proper voltage for your batteries. as a bonus it also isolates your truck batteries from the rv batteries so you cannot drain your truck down.
if you use the 7 pin charge line to feed it the inlett amps will be up to 50% higher than the ouput amps, the reason to run a larger wire on a plug is to lower that difference by making less voltage drop on the feed.
so you can also set the charging profiles on the dc to dc charger so if you have deep cycle batteries it will get the best charge as aposed to what ever the starting batteries in the truck get. same goes for gel and Li.
I am installing on in my camper in the spring, this will let me have a emergency source of power for charging if I hit a ton of dark days when I am lait fall/early winter camping. my solar handles everything but last year I saw three days of rain and dark and I was hitting the 50% mark on y deep cycle from running the furnace all the time. I have a 10 day cussion now with the LiFePO4 cell I built but, with the dc tyo dc, in 1.5 hours I can recover 24 hours power use if I need to.
2016 Cougar 330RBK
1991 Slumber Queen WS100
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โOct-26-2022 04:36 PM
We use a DC to DC converter but it is from one static battery bank to another. So no alternator etc.
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โOct-26-2022 04:18 PM
2006 Bigfoot 25C9.4LB
CEK0515 and a dog
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โOct-26-2022 05:39 AM
2018 Arctic Fox 992 with an Onan 2500i "quiet" model generator
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โOct-25-2022 05:37 PM
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.
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โOct-25-2022 05:30 PM
I run my absorption fridge when parked at home, on the move, or when I have shore power. At camp I run on propane to save the batteries for other stuff.
2023 Host Everest
2021 Yamaha YXZ1000R
1987 Honda TRX250R
2002 Honda 400EX
2023 Yamaha Raptor 700SE
2018 Look 24' enclosed trailer
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โOct-12-2022 07:55 PM
jdcellarmod wrote:
Can the charger be used in conjunction with an inverter (2000 watts) to run the refrigerator on electric while on the road?
Yes. I do it all the time when driving to save propane.
2018 Arctic Fox 992 with an Onan 2500i "quiet" model generator
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โSep-03-2022 04:35 PM
2018 Arctic Fox 1140 Dry Bath
Sold 2019 Ford F450 King Ranch (was a very nice truck)
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โSep-03-2022 12:18 PM
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โSep-03-2022 06:24 AM