I just looked at the Deltec Lead Crystal brochure you posted. In the brochure, they state 3100 discharges to 80% DoD. Then, the table further down the page, shows that the batteries retain 60% of their capacity when discharged to 80% over about 1000 cycles. Huh? THey are contradicting themselves. They also grossly understate the discharge cababilities of Lithium, although they don't state which lithium chemistry they are describing, so that data is just meaningless.
If you are shipping
batteries and their close cousins can be shipped NON-hazmat. I shipped four once using the postal service's own priority mail boxes. 200ah cells wight around 15 lbs each, depending on manufacturer, and you need four of them, so they weigh 1/2 of the weight of lead acid, or those lead crystal ones.
Finally, there is no talk about internal resistance with the lead crystal batteries. Good gel, agm
batteries can take hefty charging
, so your charge times are reduced. They also take more of the power you generate, so you get more out of your wind
, etc. My personal experience with our LIFEPO4
cells is that over 97% of the juice you generate ends up in the cells. We got by with one 120w solar
panel (MPPT controller) and an air-x (Spreco blades) in the Bahamas
, and never ran the engine
just to charge the batteries.
There are two factors that in my opinion made this possible. first, the cells must be efficient, so that you get the most of your charging
sources. Gels, AGM
and LIFEPO4 all meet this criteria, to different levels. The second, mostly never talked about key is the batteries ability to remain at less than 100% state of charge without damage or impact to their lifespan. I have only found LIFEPO4 to meet this criteria. For long-term storage
, our cell manufacturer recommends charging to 50%.
Why is this important? We often hovered around 50-60% charge for days and even weeks at a time. Then, we either had to motor
somewhere, or the wind/solar picked up enough to charge the batteries back up close to or at 100%. If you do that with AGM batteries, you will kill them. I am not sure about gels, but I think the same applies.