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Open Roads Forum  >  Beginning RVing

 > Best solar trickle charger???

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DinTulsa

Tulsa

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Posted: 03/05/19 05:17am Link  |  Quote  |  Print  |  Notify Moderator

I wasn’t sure where to put this so here goes....I’m tired of showing up to storage and finding my battery has drained down. I don’t have acces to a plug in charger, so what do you all recommend for a solar charger that won’t boil a battery dry?

fitznj

nj

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Posted: 03/05/19 05:42am Link  |  Quote  |  Print  |  Notify Moderator

Been using this
Renogy + Controller

for 5+ years to keep 2 Group 26 batteries topped up; Worked perfectly


Gerry

Tom_M

New Hope, MN

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Posted: 03/05/19 05:54am Link  |  Quote  |  Print  |  Notify Moderator

To maintain the charge on your batteries 20 watts should be sufficient. Here's one available on Amazon for $58.06:

https://www.amazon.com/ECO-WORTHY-IP65-S........tt+solar&qid=1551790029&s=gateway&sr=8-4

It includes a charge controller which will prevent overcharging.


Tom
2005 Born Free 24RB
Towing 2013 Smart Car


Lynnmor

Red Lion

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Posted: 03/05/19 06:49am Link  |  Quote  |  Print  |  Notify Moderator

The Battery Tender 021-1164 10W Solar Panel Charger and Maintainer with Built-in 3-step Automatic Microprocessor Controller should work well. Be sure that you always turn off the battery switch whenever the trailer is not in use. You do have a correctly wired switch, right?





DinTulsa

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Posted: 03/05/19 07:12am Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

The Battery Tender 021-1164 10W Solar Panel Charger and Maintainer with Built-in 3-step Automatic Microprocessor Controller should work well. Be sure that you always turn off the battery switch whenever the trailer is not in use. You do have a correctly wired switch, right?


No sir,

That’s on the list as well. I was going to pick up one of the 1/4 turn switches that disconnect the power.

CA Traveler

The Western States

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Posted: 03/05/19 07:32am Link  |  Quote  |  Print  |  Notify Moderator

Put a switch on the battery post so that everything is off.


2009 Holiday Rambler 42' Scepter with ISL 400 Cummins
750 Watts Solar Morningstar MPPT 60 Controller
2004 CR-V and 2014 Grand Cherokee Overland

Bob


Sam Spade

North Central Florida

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Posted: 03/05/19 09:06am Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

Put a switch on the battery post so that everything is off.


Except your solar tender, of course. [emoticon]

IF....your batteries are healthy and fully charged when you park the rig....you should be able to let it sit with little to no discharge over at least 90 days IF YOU COMPLETELY DISCONNECT THEM.

While a switch is convenient, if the batteries are easily accessible, then disconnecting the negative cable(s) works just as good.

P.S. There is no "good" trickle charger. It needs to include a "smart" controller to prevent overcharging. Then it is an automatic battery maintainer.


'07 Damon Outlaw 3611
CanAm Spyder in the "trunk"

Lynnmor

Red Lion

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Posted: 03/05/19 09:25am Link  |  Quote  |  Print  |  Notify Moderator

DinTulsa wrote:



That’s on the list as well. I was going to pick up one of the 1/4 turn switches that disconnect the power.


Don't buy the cheap red key type of switch, they take on water and fail quickly. I use a Blue Sea like this.

time2roll

Southern California

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Posted: 03/05/19 12:17pm Link  |  Quote  |  Print  |  Notify Moderator

For the effort to mount a panel I would go at least 100 watts.
Then you can put the RV away without having to worry about a full charge either.


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

Lwiddis

Crestview area, Inyo County, California

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Posted: 03/05/19 01:54pm Link  |  Quote  |  Print  |  Notify Moderator

100 watts or less will keep you charged while in storage but why not do it "right" and rig for solar recharging while camping too? Do an energy survey. I'll wager 200 to 300 solar watts.


2015 Winnebago 2101DS TT & Tahoe LTZ, 300 watts WindyNation solar-parallel & MPPT, Trojan T-125s. TALL flagpole for US flag. Prefer USFS, COE, BLM, NPS, TVA, USF&WS, state & county camps. Bicyclist! 14 year Army vet - 11B40 then 11A - old MOS 1542 & 1560.


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