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Re: AGM or LiFePo4


 

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Hey Phil,

Can you share your China source of LifePo4?? That looks like a great price! If I¡¯m doing my math right that¡¯s over 800 AH at 12v?? Or am I missing something?

Thanks,

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g

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From: [email protected] <[email protected]> On Behalf Of Phil Boyer via groups.io
Sent: Monday, April 27, 2020 12:15 PM
To: [email protected]
Subject: Re: [electricboats] AGM or LiFePo4

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I have 10KW of LifePo4 batteries on order from China and are due to land in Toronto first week of May. My cost so far was $2600 Canadian or $1900 US. I have not cleared customs yet so not sure what the duty and taxes will be.
My question is why do you need a different charger as mentioned below? The LifePo4 cells can be charged to 3.65 volts max so is there another factor I am not thinking of?

Phil

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On Monday, April 27, 2020, 11:49:32 a.m. EDT, L Schmitz via groups.io <terminalift@...> wrote:

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Hello Pat,? I did the upgrade last year. I went from 4? 12v 220 ah agm to? ?lifepo4? ? I put together 4 battery boxes with? 3.2v 90ah cylinder cells. 4P4S for each box. Then in series for 48v system. You will need a bms and a different? charger? This is a cool upgrade and not too difficult.. I am able to monitor the batteries in charge and discharge mode at any given time with my I phone.? I have great continuous run time and overnite charging with? my dock power. I can suggest a couple sources depending on east or west coast usa.;? I hope this helps.? thank you? best regards Larry Schmitz

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?Terminalift LLC

9444 Mission Park Place

Santee, CA 92071

Ph: (619) 562-0355

F: (619) 562-2060

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On Monday, April 27, 2020, 08:03:54 AM PDT, sw via groups.io <v1opps@...> wrote:

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Is that 24v or 48v?

Can buy surpluses Tesla ,?leaf or other?packs too



On Monday, April 27, 2020, 07:43, greenpjs04 <forums@...> wrote:

Hello everyone,

Over 10 years ago, you guys helped me to convert my 24' pontoon to
electric.? I ended up with a Torqeedo Cruise 4, four group 31 AGM
batteries and a 4 channel DualPro charger.? I've had ten great summers
using this configuration on some inland lakes in Ohio. Last summer, I
started noticing the battery capacity wasn't what it was when the
batteries were new.? The Torqeedo would shut down due to "depleted
batteries", but I was always able to turn it off and then back on where
upon I could return home at a slower pace. That is one of the things I
like about electric vs gasoline.? I have never been stranded.

Anyway, I suppose it is time to replace the batteries.? I can't complain
about getting 10 years out of them.? As I see it, I have two options:

1. Buy another set of AGMs - a little under $1000

2. Buy LiFePo4's - at least double the cost, but less weight and more
usable range.

As an engineer, I like using new technologies so I lean toward the
LiFePo4's.? However, many of the posters I follow on this forum bought
them directly from Chinese suppliers.? With all the COVID 19 disruptions
to business and our government threatening to raise tariffs, I worry
about placing an order that never gets filled.

I would appreciate any opinions on which way to go and any
recommendations for low risk suppliers for batteries.

Thanks,

Pat




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