electric guru needed. 28v system

ETRNL · 07-07-2008, 08:01 PM

i am looking for someone to help me build/convert a way to run 2 sets of lights with the following specs out of my 4runner...
28vdc
5amp
250w

should be simple, i hope..
anyhow plese let me know if you can help.
THNKS ETRNL

4Crawler · 07-07-2008, 09:31 PM

Search for "DC to DC converter":
http://www.google.com/search?q=dc+to...ient=firefox-a

ETRNL · 07-07-2008, 09:59 PM

ok so i tried just using 2 batteries and that looks to be easier. now, how does one go about charging 2 batteries in series with the stock alternator?

4Crawler · 07-07-2008, 10:15 PM

Hard to do directly. One option would be a series-parallel switch or relay so you could put the batteries in parallel to charge, then switch them to series mode to power the load. Depending on how long the load needs to run and how big the battery is (Amp-Hour rating), that may work. Or you might be able to rig up some sort of electrically floating battery charger for the 2nd battery (essentially a DC-DC converter). Or add a 28 volt alternator to the engine or make up a motor-generator unit (12V motor driving a 28V alternator) and use that.

07-07-2008, 08:01 PM	#1 (permalink)
ETRNL Registered User Join Date: Jan 2007 Location: Priarieville LA Posts: 295	electric guru needed. 28v system i am looking for someone to help me build/convert a way to run 2 sets of lights with the following specs out of my 4runner... 28vdc 5amp 250w should be simple, i hope.. anyhow plese let me know if you can help. THNKS ETRNL __________________ 2001 4Runner LTD, ISR/deckplate/ECT mod, 6K HIDs, 12g headlight wire harness, Satoshi, Hood Emblem, fog light mod, constant power mod, NO DRLs, Remote start with ~1 mile range. my favorite video

07-07-2008, 09:31 PM	#2 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 6,261	Search for "DC to DC converter": http://www.google.com/search?q=dc+to...ient=firefox-a __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs. r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

07-07-2008, 09:59 PM	#3 (permalink)
ETRNL Registered User Join Date: Jan 2007 Location: Priarieville LA Posts: 295	ok so i tried just using 2 batteries and that looks to be easier. now, how does one go about charging 2 batteries in series with the stock alternator? __________________ 2001 4Runner LTD, ISR/deckplate/ECT mod, 6K HIDs, 12g headlight wire harness, Satoshi, Hood Emblem, fog light mod, constant power mod, NO DRLs, Remote start with ~1 mile range. my favorite video

07-07-2008, 10:15 PM	#4 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 6,261	Hard to do directly. One option would be a series-parallel switch or relay so you could put the batteries in parallel to charge, then switch them to series mode to power the load. Depending on how long the load needs to run and how big the battery is (Amp-Hour rating), that may work. Or you might be able to rig up some sort of electrically floating battery charger for the 2nd battery (essentially a DC-DC converter). Or add a 28 volt alternator to the engine or make up a motor-generator unit (12V motor driving a 28V alternator) and use that. __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs. r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

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