Lead Crystal

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Originally Posted by Ranga

Just a reminder - what voltage can you take a lead crystal down to without damage?

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The answer is 0v. NOTE not 0% oSoC, which is 10.5v.

Lead Crystal batteries can be SAFELY discharged down it 0v and then recharged and used again.

I personally do not see this as an advantage, other than you will not damage a Lead Crystal battery if you forget and leave something on, like a camp light.

The very fact that these batteries are safe when cycled down to 10.5v, means that while there are few 12v devices that will run at 10.5v but none the less, these batteries can be used for powering such devices. 12v to 240vac inverters come to mind!

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Originally Posted by drivesafe

Yes the Smart charge will work with LCs but will NOT achieve a faster charge than what your alternator can do.

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Are you planning to put a kit together for next gen battery tech with support for solar at all?

Many Thanks,
pd

Hi dazzler and I have already upgraded the software in both the ABG-25 and the DT90, to cater for Lead Crystal batteries.

For the last 6 months, both these units are factory set to 11.6v low voltage cut-out but can now be reset by the user to have a low cut-out voltage setting of 10.5v.

This lower setting can be safely used with Optima Yellowtops and Lead Crystal batteries, giving both batteries a 20% increase in available capacity.

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Originally Posted by drivesafe

Hi dazzler and I have already upgraded the software in both the ABG-25 and the DT90, to cater for Lead Crystal batteries.

For the last 6 months, both these units are factory set to 11.6v low voltage cut-out but can now be reset by the user to have a low cut-out voltage setting of 10.5v.

This lower setting can be safely used with Optima Yellowtops and Lead Crystal batteries, giving both batteries a 20% increase in available capacity.

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Thanks for that,

What about LC charge profile? %50 rate of charge in boost cycle, when does boost kick in? I I have 2x110 LC then how does the charge/discharge work? can I also have 2 dissimilar LC batteries in the battery bank? more confused than before.

The auxilliary battery in my defender is a lead crystal. It is 14 months old and has been great. I was going to buy a Fullriver battery but Jamie from the company below said I should spend a few more dollars and get a Lead Crystal. No regrets. Think I read somewhere they are used by the military and can last up to 16 years.

Lead Crystal Deep Cycle | Jamie's Touring Solutions

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Originally Posted by Kidbeen

The auxilliary battery in my defender is a lead crystal. It is 14 months old and has been great. I was going to buy a Fullriver battery but Jamie from the company below said I should spend a few more dollars and get a Lead Crystal. No regrets. Think I read somewhere they are used by the military and can last up to 16 years.

Lead Crystal Deep Cycle | Jamie's Touring Solutions

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What model and what charger did you use? how long does it last and compare to a similarly sized AGM?

Many Thanks,
pd

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Originally Posted by dazzler

What about LC charge profile? %50 rate of charge in boost cycle, when does boost kick in? I I have 2x110 LC then how does the charge/discharge work? can I also have 2 dissimilar LC batteries in the battery bank? more confused than before.

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Hi again dazzler and when charging from an alternator, there is no need for “boost” or any other stage, as found with solar, DC/DC or battery chargers.

All three are constant CURRENT charging devices.

Alternators charge in a different way because they are constant VOLTAGE charging devices and as such they can charge faster but do not over charge any batteries, regardless of battery type.

As for for discharging. With any batteries wired in parallel, all the batteries will discharge at the same rate. So no issue there.

With any multiple battery setup, where the batteries are wired in parallel, then the capacity is a total of all the batteries in the setup.

This type of paralleled battery setup can be batteries of the same size, like your suggested 2 x 110Ah, the you have a total capacity of 220Ah.

If you had a 120Ah battery wired in parallel with a 7Ah battery, then you have a total battery capacity of 127Ah.

The size of each battery in a parallel setup is irrelevant as each battery is just part of the total capacity, which is made up of all the batteries in a given setup.

Folks, if you are interested in a Lead Crystal battery, send me a PM with the size of the battery, or part number of the battery, plus your delivery location, town or suburb, and I can give you a quote including delivery cost.

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Originally Posted by dazzler

What model and what charger did you use? how long does it last and compare to a similarly sized AGM?

Many Thanks,
pd

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It is a 100 ah one. The charger I use is a Projecta IC1000, a 7 stage one. Are you talking longevity? If that is the case I hope to get a few more years out of it. Only time will tell. If you are talking amperage at a 100 ah you would only get the same run time as any other AGM. I bought it in an emergency between Christmas and New Year when my old one went cactus and I was about to go camping. The lead crystal cost me more than a normal AGM.

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Originally Posted by Kidbeen

It is a 100 ah one. The charger I use is a Projecta IC1000, a 7 stage one. Are you talking longevity? If that is the case I hope to get a few more years out of it. Only time will tell. If you are talking amperage at a 100 ah you would only get the same run time as any other AGM. I bought it in an emergency between Christmas and New Year when my old one went cactus and I was about to go camping. The lead crystal cost me more than a normal AGM.

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Thanks Kidbeen,

I am going to couple 2x100ah (actually 110ah in c20 AGM money) and was wandering how much runtime you get compared to AGM, assuming you are lowering the cutoff voltage compared to AGM. I am expecting to get 20~30% better runtime.

Also wondering if your charger is adequate for LC as it is only rated a 10A, mine will need a @60A charger

Many Thanks
pd