AGM to Lithium

[Joe temagami11]

Putting together my first system at the cabin - the setup I’m looking at has 4 6v430ah Surrette AGM’s

if I was going to go with Lithium instead - what battery setup would be equivalent in size to the 4 Surrettes?

trying to keep it simple - only over the counter stuff lifepaks etc.

cheers !

 

[GMB]

Some general math. 6x430x4=10,320 total watt hours. Assume 50% of that is usable since these are AGM, so about 5160 watt hours.

If you went the 3.2 volt, 280 Ah route, you could purchase 8 of them and make two 12 volt batteries or one 24 volt battery with 7,168 watt hours (3.2x280x8). Cycle the LiFePO4 battery from 90% down to 10% and that seems about right (5735 watt hours)

I paid $1882 for 16 of these batteries with sea shipping, then FedEx to my door in the USA. So about $1000 in total for 8 sounds about right, but you would need to check on current prices and shipping quotes depending on where you live.

Someone else can chime in if my math is off...

 

[Joe temagami11]

Thanks for that - appreciated.
What about the 12v _ah style ?

I would like to keep this as simple as possible with same amount of power but only 1-4 total batteries.
Thanks again.

 

[6269ed]

Costco has Lion energy two pack 105AH batteries on sale till July 7 for 1399.00 , if you buy 2 -2 packs that's 420 AH useable power for 2798.00.
3500 cycle lifetime warranty backed by Costco's satisfaction guarantee (if you're EVER not satisfied with a item bought from Costco just return it for a full refund)
lead acid you only get 800 cycles or less , limited 1 or 2 year warranty and you can only draw them down half of the total AH capacity, can't charge them nearly as fast (the last 15% takes forever) plus they sulfate quickly if left partially charged, lithium doesn't care if left partially charged for a couple of days because it's cloudy.
Food for thought

 

[Forbisher]

Putting together my first system at the cabin - the setup I’m looking at has 4 6v430ah Surrette AGM’s

trying to keep it simple - only over the counter stuff lifepaks etc

How much do those 4 AGMs cost?
I presume you are going 12 volts

 

[Joe temagami11]

How much do those 4 AGMs cost?
I presume you are going 12 volts

650$ Canadian a piece

 

[GMB]

Thanks for that - appreciated.
What about the 12v _ah style ?

I would like to keep this as simple as possible with same amount of power but only 1-4 total batteries.
Thanks again.

If you hate money, you could buy 5 of the 12 volt, 100 Ah BattleBorn batteries. That would be 6000 watt hours total and cost about $6000. Or as 6269ed stated, Costco has that current deal on LiFePO4's. As you can see, building your own saves a lot of money. My though process is always, why pay someone else (or a company) for something I can do myself? But everyone is different and has different needs and budgets. Hope that helps.

 

[Joe temagami11]

Would 4 lifepower 12v 100ah work?

I can get those for 3200$. The 4 AGMS are going to cost 2600$
?

 

[6269ed]

Would 4 lifepower 12v 100ah work?

I can get those for 3200$. The 4 AGMS are going to cost 2600$
?

Or you can buy 4 Lion energy 105 AH batteries for 2798.00 , that's just 198.00 more than the lead acid.

 

[Joe temagami11]

Or you can buy 4 Lion energy 105 AH batteries for 2798.00 , that's just 198.00 more than the lead acid.

sorry I should have stated I’m up north.
Costco in Canada doesn’t carry them...

 

[6269ed]

Costco. Com none of the stores stock them