Good Sam Club Open Roads Forum: Solar controller float charge at 13.6
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 > Solar controller float charge at 13.6

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Big Love

SF Bay Area, CA

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Posted: 07/11/20 08:17am Link  |  Quote  |  Print  |  Notify Moderator

I have an small trailer with 200w of solar panels and two 6v deep cycle lead-acid golf cart batteries. The controller I have is Renogy Wanderer 30A, described as capable of separate bulk, absorption and float charges and apparently is programmed to float at a fixed charge at 13.6v after the batteries are fully charged.

The float is not adjustable on this controller. I note that when in float, the amperage going to the batteries at 13.6v is very low, typically less than 1 amp.

My other trailer has a converter which charges at 13.2v float, which I believe is a sign of a good multistage charging system that does not overcharge the batteries.

Is this solar controller overcharging my batteries in float? Or is the low amperage at 13.6v a safe float?

StirCrazy

Kamloops, BC, Canada

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Posted: 07/11/20 09:12am Link  |  Quote  |  Print  |  Notify Moderator

from what I have read anywhere between 13.2 to 13.8 is acceptable for a float, mine is 13.6 also on both my solar and my plugin.

Steve


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time2roll

Southern California

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Posted: 07/11/20 09:37am Link  |  Quote  |  Print  |  Notify Moderator

13.6 is fine when you consider it is off (zero volts) 12+ hours a day.


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KD4UPL

Swoope, VA

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Posted: 07/11/20 10:51am Link  |  Quote  |  Print  |  Notify Moderator

Look up the manufacturer's recommended float voltage range for your batteries. Compare that to what you controller is doing. Anything else is nothing but guessing.

Lwiddis

Near Annett’s Mono Village, Bridgeport, CA

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Posted: 07/11/20 10:59am Link  |  Quote  |  Print  |  Notify Moderator

My WindyNation MPPT 30 floats at 13.5.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, 300 watts solar-parallel & MPPT, Trojan T-125s. TALL pole for flags. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - (MOS 1542 & 1560)


garym114

Bluff Dale, Texas

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Posted: 07/11/20 12:04pm Link  |  Quote  |  Print  |  Notify Moderator

Have you ever performed an equalization charge on your 6v battery bank, may help?


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Ed_Gee

Central Oregon coast

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Posted: 07/11/20 06:29pm Link  |  Quote  |  Print  |  Notify Moderator

For all standard Lead Acid batteries, the nominal float voltage is 13.5 give or take a few tenths. The original poster has no problems.....its a non issue.


Ed - on the Central Oregon coast
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