Luke Hairs

The life span on the Aquion batteries seem promising, maybe worth to take into your comparison ...

https://www.altestore.com/store/Deep-Cycle-Batteries/Batteries-Saltwater-Technology/Aquion-Energy-M110-LS83-Pre-wired-306kWh-Battery-Module-48V/p11988/

You should check the actual capacity on those. Ultrafire is infamous for overstating capacities.

I saw in the feedback on some Ultrafire 5800 mAh on Aliexpress that they tested as only 1500 mah.

If they overstate capacity by 400%. How much do they overstate longevity?

I did check out the Aquion option.

I even found an online reseller:

http://www.altestore.com/store/Deep-Cycle-Batteries/Batteries-Saltwater-Technology/Aquion-Energy-S20P-Pre-wired-Battery-Stack-48V/p11629/

However there is a back log until July at least.

Shipment for me to Thailand would be an issue too...

Luke

Ali-express shows some very low prices for Li 18650 batteries. (Straight from China)

Note of advice: ALWAYS read the buyer feedbacks on Ali express. There are even companies on there to incorrectly claim 8800mAh 18650 Li batteries. (As far as I have seen, 3400mAh is about the maximum there is now)

Buyer Feedback will mention the actual capacity of the cell having tested them on an IMAX device

An example would be:

http://m.aliexpress.com/item/1198812901.html

Around 36 usd for 25Ah worth of 3.6V storage.

Around .4 usd/W

Luke