Upgrade Your E-Z-GO ST Express to Fleet LithiumThe ST Express is a hauler, and eight 6V flooded batteries are about 420 lb of what it is hauling. One 51V Fleet Lithium pack takes roughly 300 lb back for payload, keeps full torque loaded, and ends the weekly watering and terminal cleaning that a work vehicle never gets on schedule.Choose Your Capacity Capacity Range* Best For 51V 65Ah Up to 27 mi Stock carts only 51V 105Ah Up to 50 mi Daily driving 51V 168Ah Up to 75 mi All-day use 51V 210Ah Up to 90 mi Max range, fleet use 65Ah is for stock motors and controllers only. If your cart is lifted, loaded, or running an upgraded motor or controller, start at 105Ah.What's Included 51V NexGen Fleet Lithium LiFePO4 Battery (selected capacity) CH5618 — 58.4V 18A LiFePO4 Smart Charger Vehicle-specific mounting bracket kit — matched to your cart's factory battery tray AC0219 — AC Power Connector Cable Set Digital State-of-Charge Gauge All mounting hardware Key Specs 300A NexGen BMS with 800A peak surge Patent-pending fire suppression system Built-in cold-weather heater — activates automatically below 32°F (standard, not an add-on) Bluetooth monitoring — voltage, temp and cycle count from your phone 10-year warranty — designed and assembled in the USA Fitment Guide OEM Model Years Factory Battery Tray Bracket Shipped E-Z-GO ST Express 2008–2012 8x 6V Matched to your tray Which Do You Have?This kit is for the electric 48V ST Express with eight 6V batteries. Gas models and voltage-converted vehicles are not covered.Will It Work With My Controller?The ST Express uses E-Z-GO's 48V PDS/SepEx DC drive. The 51V Fleet pack drops straight in with no controller work.Frequently Asked QuestionsWill this fit my ST Express?Yes, for the electric 48V eight 6V build.How much payload do I get back?About 300 lb versus the factory lead pack.Does it fit gas ST models?No — electric only.How long does installation take?30–60 minutes with basic hand tools.Does it work in cold weather?Yes. The built-in heater activates automatically below 32°F — standard on every pack.*Range estimates are maximums under ideal conditions (flat terrain, single rider, 12–15 mph, 70°F). Actual range varies with terrain, weight, speed, and temperature.
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