Comment Re:Full Circle (Score 2) 98
With lead-acid and extended run times, volume starts mattering again. Especially if one is trying to retrofit cell towers that might not have had significant UPS capability before.
In addition, the lead-acid batteries in this use can last for a long time, and perhaps more importantly, the UPS equipment is set up for lead-acid. It's cheaper to replace the lead-acid batteries than it is to switch to a newer chemistry, even if LFP is getting down to lead-acid prices per kWh.
For a NEW install, I'd very much look at newer chemistries. Though NMC would be low on the consideration list. As you said, need durability not low mass/volume, and lower cost is always good.