Battery Replacement?

But when you are recharging off-grid, you don't do a full charge, due to generator waste of gas and time doing the high SOC part at low and tapering amps.

You do 50-80s or 50-90s so you will get sulfation anyway. You must find a way to do a proper "recovery" to true full and desulfation equalize every so often. (If you have solar, you might get to full--depends, but we are talking gen and charger)

This is the same with AGMs as with Flooded because of generator time. Now you have to do a "recovery" with the AGMs, which IMO is not so easy at all compared with Floodeds due to the lack of an hydrometer measurement with AGMs.

Bang for buck, LA 6v GC Cosco.....8-10 yrs
AGM...way overpriced
Trojan....always been a joke,......way over priced

It takes months for an AGM Oops I mean a good quality AGM to start to degrade in capacity. Remedy? Leave at 14,4 overnight.

When a flooded battery sulfates, standard recharge voltage does not recover it overnight. A top charge is required. Are you and your charger prepared for this?

Very abused AGMs may need recovery. The Concorde battery manual details how to do it. If you are that hard on batteries, maybe lithium is the way to go.

Massive solar always have a secondary bank undergoing complete charging. Or charging with a low speed generator. Ok let's buy a dozen 8D lithium batteries.

The true maintenance free battery costs out of reach. I have to do the best I can with what I've got. I wonder how much money 10,000 amp hours @ 24 volts lithium costs?

Anyway as far as flooded batteries are concerned, I would seriously look at Rolls & Surrette. My 31 concorde has been disconnected since the first of the year. Let's see what reality brings.

RJsfishin wrote:
Bang for buck, LA 6v GC Cosco.....8-10 yrs
AGM...way overpriced
Trojan....always been a joke,......way over priced

My first set of Trojans lasted 4 years. When those went bad I bought Sams Club 6v GC batteries at half the price in 2007 and they are still being used today. It took me a while to learn proper maintenance so I figure the Sam's Club were better maintained. Everyone has different electrical requirements so it is hard to compare battery brands or types based on longevity, but I don't full time but mainly dry camp with minimal battery requirements, so for me I would by the Sams Club batteries again and hope for another 13 years of life.

For the embossed purple T105 battery the distributor was paying $38.00 and he threw a fit when Trojan raised the price to $44.00 But he purchased in 4 pallet quantities.

Life in a golf car is hideous on a battery.

MEXICOWANDERER wrote:
Oh yeah? Why not use Velcro and wing nuts and buy car starting batteries? Cheaper, 7 year warranty. Three year free exchange... say they'll do it. Less than 10% come close to actually doing it.

FIrst car starting batteries are not all that cheap (Compared to Flooded wet GC-2. about the same

Second STARTING batteries are designed to be kept near full (80% SOC or higher) and recharged PROMPTLY after starting the car.

MARINE/deep cycle are really STARTING bit with a slight admission to the needs of Deep cycle. Keep 'em 75% or fuller SOC

DEEP CYCLE 50%

So if you have say a pair of Group 29's that's around 210 amp hours and if starting you can use about 45, MARINE/deep ccle 52

DEEP CYCLE 105

See the difference