Jay58
Melbourne (central east coast) Florida
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When hooking up batteries together (lithium) to make a bank of 2 - 12v and in a year 2 more with the goal of 20 in 2 years
What size welding wire would one use to reduce loss. Keeping in mind all same length
2020 Jayco Precept 34G
Central Florida (East Coast)
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naturist
Lynchburg, VA
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Depends on wire length and peak current drawn.
Google wire gauge and find one of the calculators/tables online.
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2oldman
Nevada
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20? Seriously? Are these tiny batteries?
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Jay58
Melbourne (central east coast) Florida
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Yes really.
To each their own.
Ok
18inch each.
This is only to join the positive and negative terminal to create the battrry bank. 4/0 or 2/0 ?
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time2roll
Southern California
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20? Connected to bus or just to each other?
Connected to each other I would use maybe one size smaller than the largest main cable.
Connected to a bus I would go smaller but large enough to handle max current from each battery.
2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up
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pianotuna
Regina, SK, Canada
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Hi,
That may depend on the capacity of the battery management system. If it limits to 1C then there is little point in having thicker wire from the battery to the buss bar.
Regards, Don
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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sehunter
Rancho Murieta, Ca.
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If you go to the 2nd page of this "12v side of life" is what I used to make up my cables.
The 12volt side of life
Stan
2008 Bounder
38P, W24, 8.1L, 3 Slides
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wa8yxm
Davison Michigan (East of Flint)
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Ok there is a point of diminishing returns but the general rule is the bigger the wire the lower the loss.
However.. if you are only drawing say 20 amps.. 2/0 (not 20 but 2/0) is overkill
if you are drawing 200 amps 2/0 is the smallest I'd recommend.
For battery to battery at least the same size as battery to RV.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times
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2oldman
Nevada
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..
* This post was
edited 12/30/21 10:01am by 2oldman *
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Lwiddis
Near Bishop, California
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Wire size in RVs is NO time to penny pinch.
See the WindyNation chart at: https://www.windynation.com/jzv/inf/choosing-right-wire-size
Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AMP Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad
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