Joined the Telco AGM group about 20 months ago. Will last a looooong time. However, doubt it would power a 300w inverter very well, being just only 150Ah and having very, very thick heavy lead plates so it will last 10+ years in an isolated cell phone site location miles and miles up a dirt road on the mountains in the boonies. Also, my Teleco does NOT like to take much more than a 20Ah recharge rate so far... YMMV, it's a Deka.
Highly doubt I will ever again buy FLA battery ever again, would buy an AGM, and when the prices drop a lot, Lithium chemistry may in my future. YMMV.
