Just read your post on another forum.

Reviews along the lines of "they have been running perfectly for the last 6 months" are pointless. I expect ours to last another 10 years.

Back in 2014 I purchased a 4 cell 300Ah Sinopoly LiFePO4 battery pack for our motorhome. It has no inbuilt BMS circuitry and has survived 10 years of fulltime travel used to power the motorhome and start the 3.9l turbo diesel engine often multiple times a day with just a 5% loss at the last annual capacity test.

About 18 months ago I purchased a 4 cell 280Ah EVE LiFePO4 battery pack from NZ Lithium (on your list) and paralled with the original battery.

I would have absolutely no hesitation in recommending NZ Lithium. He knows his stuff and at least you can be assured of the cell quality and origin. Just ask.

Far too early to report on longevity yet though. I could report back in another 10 years.

I take battery warantees with just a few grains of salt.

Quality cells and they will last.