Which is better for my batteries?

Go to Harbor Freight and grab a screwdriver.

And compare it to a Wiha screwdriver.

US battery imports an un named unlabelled life cycle chart for a single cell battery and permits the reader to imagine its significance. This is unethical as hell and its de jour from US Battery.

The signifigance of survivability shows up at 20% capacity remaining cycles and there is no meaning zero information regarding percentage of original amp hours remaining at end of cycle life. Pure hocus pocus.

Hauling a half ton extra around to ensure >-20% max depth of discharge is not exactly intelligent. I know a client near San Lucas who successfully uses perhaps five or so TONS of VRB liquid calcium batteries. The last I checked they were going on their ninth year. Successfully.

Only catch is the bank dicharge limit is 85% remaining. The batteries were free. Mother earth can support a lot of weight. Ching Chong tires cannot.

Back to that farce of life cycle representation. Even a Lifeline would be hard pressed to compete with that <20% remaining life cycles. Now do you -really- think that chart is for anything else than a single cell accumulator?

US Battery refused to deal with me. So another OEM purchased their batteries for me to test. The only local company I gained respect for was Trojan and Ramcar. But there's a caveat - batteries from the Philippines for Ramcar. The Mexican LTH was another but at that time LTH did not manufacture a ciclando profundo battery. LTH is still skittish about acid starvation. No "heavy" batteries their GCs are around 210 AH.

Yeah. Me and my fetish against deceptive mumbo-jumbo again.

red31 wrote:
I've always liked this one that shows no TRUE deep cycle

http://www.trojanbattery.com/wp-content/uploads/2014/05/CycleLife-RE-Family.png

That chart does not say much for AGMs.....

I've always liked this one that shows no TRUE deep cycle

http://www.trojanbattery.com/wp-content/uploads/2014/05/CycleLife-RE-Family.png

MEX, your estimate said 2-3000 cycles at 30% and the chart says 2050 so why so hard on USB?
Seems in the zone to me.

Are you saying Trojan and Rolls are that superior to USB? or what?
If so why not estimate closer to 3000+?

A cycle-life chart with no key. US Battery has not changed I see. Sort of sad. Well what the heck the chart may be useful after all. Leave the boys rolling on the floor at Trojan and Rolls. Made me smile sorta. Then I remembered some folks will actually take it seriously...

I would let it cycle on solar. Turn on the TC2 once a month if you think necessary or persistent clouds.

http://usbattery.com/usb-expected-life-cycle.pdf

Stay at the top, no need to dip below it.

Every cycle you make is one less that you can use later. I'd leave the solar and the shore power on.

Yep. You assume correctly. Real cyclable batteries can endure 2-3000 30% discharges. If you have gr 24, 27, 29-30-31 hybrids cycle life is half that. Don't know your controllers but you will need to top-charge ypur batteries every couple of months or so.