Upgrade Your E-Z-GO ST 400 to Fleet LithiumThe ST 400 was built for rough ground, and lead-acid hates rough ground — plates shed, capacity drops, and the pack that came with the vehicle is rarely the pack it still has. A 51V Fleet Lithium pack has no liquid, no plates to shed, and no watering schedule, while cutting roughly 300 lb off an eight-battery vehicle.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 400 2010–2012 8x 6V Matched to your tray Which Do You Have?This kit is for the 48V electric ST 400 with eight 6V batteries. Gas ST 400s are not covered.Will It Work With My Controller?The factory 48V DC controller runs the 51V Fleet pack without modification.Frequently Asked QuestionsWill this fit my ST 400?Yes, for the electric 48V eight 6V generation documented in the factory manual.Will it handle trail and jobsite use?Yes. The pack is sealed, IP67-rated, and rated for 5,000+ cycles.Does it fit gas ST 400s?No.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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