Re: [electricboats] AGM or LiFePo4

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

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

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

​Terminalift LLC

9444 Mission Park Place

Santee, CA 92071

Ph: (619) 562-0355

F: (619) 562-2060

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

Is that 24v or 48v?

Can buy surpluses Tesla , leaf or other packs too

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