[electricboats] Relative priorities in choosing LiFePO batteries for bank?

Dear group members - I will have to commit to the actual battery bank purchase for my boat build sometime in the next few months, and as a complete newbie to electric boating I struggle to decide priorities. Can the Hive mind help me out here?

My boat will be a 34ft/10m, 5 ton dry weight catamaran - the first of its line to be commissioned without a mast and sailing rig as a slow trawler. Propulsion will be via twin 10kW pod motors at 48V. There will be approx 4kWp solar and a main/propulsion battery bank of around 32kWh alongside a house bank of around 5.5kWh. I will be buying branded batteries for warranty and insurance reasons.

I will also be running an 11ft dinghy tender on electric propulsion, and hope to use the same (or at least same brand) 5.5kWh battery/-ies for this as for the mothership.

It would be very helpful if members could rank the following considerations in priority terms if they were in my position:

* Expense (£/kWh) - possibly including any order volume related discount
* Power charge density (kWh/kg)
* Luggability (ie. <40kg per unit) in case of malfunctions
* Warranty duration
* Water ingress protection rating (IP67 or less)
* Advertised life expectancy (discharge cycles to 80%SOC)
* [any other criterion members might consider important]

Would members advocate buying European/North American labelled batteries over Chinese/HK labels in case a full blown trade war erupts in the years ahead?

If the above considerations have been previously discussed or written about I would be grateful for links to relevant forum/blog posts or publications!

Many thanks for your advice,
Kai


-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#31655): https://groups.io/g/electricboats/message/31655
Mute This Topic: https://groups.io/mt/85063070/3360820
Group Owner: electricboats+owner@groups.io
Unsubscribe: https://groups.io/g/electricboats/leave/6293187/3360820/430022002/xyzzy [newarmyguitar24@gmail.com]
-=-=-=-=-=-=-=-=-=-=-=-