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Old 17-04-2018, 03:00   #1
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New trojans

My batteries decided to retire early yesterday but fortunately I was able to buy decent batteries here in the Seychelles.

I've just installed some Trojan T105's.
They have all come of the shelf sitting around 6. 05v, abit low.

What's the best practice here. Should I charge normally first up or equalise them straight of the bat seeing that they are abit low?

Thanks in advance.
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Old 17-04-2018, 04:24   #2
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Re: New trojans

Quote:
Originally Posted by daletournier View Post
My batteries decided to retire early yesterday but fortunately I was able to buy decent batteries here in the Seychelles.

I've just installed some Trojan T105's.
They have all come of the shelf sitting around 6. 05v, abit low.

What's the best practice here. Should I charge normally first up or equalise them straight of the bat seeing that they are abit low?

Thanks in advance.
Charge to full with absorption voltage temp compensated to 14.8V at 80F. When current drops to less than 1% of Ah capacity at 14.8V, or stops dropping and stabilizes, you can then boost the voltage to 15.5V - 16V depending upon battery temp...
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Old 17-04-2018, 06:22   #3
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Re: New trojans

Thanks Mainsail, much appreciated, was hoping you'd comment.
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Old 17-04-2018, 06:51   #4
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Re: New trojans

One more question mainsail, purely out of curiosity.

Obviously these batteries have self discharged whilst in storage. They have do. There were literally hundreds and hundreds of them on pallets. There's something like 3000 golf carts in the Seychelles (apparently).

Now I'm not sure how long they were sitting on pallets in the US then were sitting on ships now sitting in a warehouse in the Seychelles.

My question is, I assume this is normal? These batteries are already under full capacity due to sulphation from storage time and transit time therefore none of the traditional lead acid batteries sold are able to reach full soc as they are slightly damaged due to self discharge as a result of the sitting time?

As a bank once all connected (675amp hour) they measured 12.05v.

Once again thanks for your advice.
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Old 17-04-2018, 07:03   #5
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Re: New trojans

I have purchased batteries in similar conditions and gave then an equalization charge every few weeks to begin with and I got decent life out of them. Just dont let the water get low as that can expose the tops of the plates and you'll have sulphation in an instant. Check water levels every 30 days. You can hit those batteries with fairly high absorption charge rates without hurting them.
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Old 17-04-2018, 08:28   #6
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Re: New trojans

Breaking in period if possible. keep amps rate lower both in and out, say .15C max for a dozen or 20 cycles

Once truly full and equalized, you could draw down at .05C until 10.5V (no lower!) and immediately recharge.

This will help with initial capacity and longevity.

Assuming you care for them well otherwise.
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Old 17-04-2018, 08:40   #7
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Re: New trojans

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Originally Posted by daletournier View Post
One more question mainsail, purely out of curiosity.

Obviously these batteries have self discharged whilst in storage. They have do. There were literally hundreds and hundreds of them on pallets. There's something like 3000 golf carts in the Seychelles (apparently).

Now I'm not sure how long they were sitting on pallets in the US then were sitting on ships now sitting in a warehouse in the Seychelles.

My question is, I assume this is normal? These batteries are already under full capacity due to sulphation from storage time and transit time therefore none of the traditional lead acid batteries sold are able to reach full soc as they are slightly damaged due to self discharge as a result of the sitting time?

As a bank once all connected (675amp hour) they measured 12.05v.

Once again thanks for your advice.
They have a date code on them.

month is a letter (E = May), single number is the year (8 = 2018)
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