WELCOME TO RIVER DAVES PLACE

Need info on a solar battery tender

Baja 252

Well-Known Member
Joined
Feb 18, 2009
Messages
258
Reaction score
509
I have a tractor that we keep in a barn on a piece of property that has no electricity. If we don't use the tractor often enough, the battery (new) goes dead after a few months. I unhook the neg cable when we're done using it, but it still won't stay charged especially during winter. I was thinking of a solar panel that would put out enough to keep the battery topped off, but I know nothing about them.
The local farm store has a 2 watt one (5" square panel) and a 5 watt one (12" square panel) , but I'm not sure that's what I need. The battery is one of those big ass tractor battery's that is twice the size of a car battery. Another issue is the tractor is in the middle of the barn so I'll need a long (40') cord from the panel (sun light) to the battery.

What watts do I need? I'm ooking for simple, do I need some inverter or something so it doesn't overcharge the battery. Love to find some plug and play thing that prevents overcharging and just keeps the battery topped off.
 

GOTTBoat

Well-Known Member
Joined
Dec 20, 2007
Messages
222
Reaction score
170

This is what I have had for a couple years, says comes with 60" DC cable but it more like 60'. I don't have a tractor (yet) but it will keep two Optima's in my boat fully charged.
 

Foscheck

Well-Known Member
Joined
Feb 29, 2016
Messages
156
Reaction score
152

This is what I have had for a couple years, says comes with 60" DC cable but it more like 60'. I don't have a tractor (yet) but it will keep two Optima's in my boat fully charged.
I use the same one for the motorhome battery. Works well
 

HAVASUSUN

Well-Known Member
Joined
Mar 26, 2008
Messages
692
Reaction score
495
I will start by saying I am no battery expert but would a AGM battery help? It is my understanding they do not discharge when not in use like a wet bell does.
 

monkeyswrench

Well-Known Member
Joined
Sep 7, 2018
Messages
11,590
Reaction score
24,042
A cheapie 2w one and some speaker wire. Silicone the panel to the barn in the sun, run the wires to gator clips at the battery. If the battery is disconnected, the requirements to float charge is minimal.
 

rivermobster

Club Banned
Joined
Dec 28, 2009
Messages
40,680
Reaction score
22,286
A cheapie 2w one and some speaker wire. Silicone the panel to the barn in the sun, run the wires to gator clips at the battery. If the battery is disconnected, the requirements to float charge is minimal.
Yep. The one we have on the golf cart came with a ten foot cable. Even a few hours of sun everyday keeps it charged.
 

Boat 405

Well-Known Member
Joined
Dec 20, 2007
Messages
3,150
Reaction score
4,764

I use the 10w version on 2 odyseey batteries. It works awesome!
 

rivergames

Well-Known Member
Joined
Jan 7, 2008
Messages
14,837
Reaction score
9,089
I have 4 batteries in my fishing boat that is parked in my driveway. I use 2 cheap solar charges that I got from Harbor Freight or Amazon. I've had them for about 4 years now and it keeps my batteries fully charged!
 
Top