Choose between the actual carts, not just their voltage labels. Battery condition, motor/controller configuration, documented load limits and the delivered price can change the decision. There is no verified universal 48V advantage in resale or parts availability in this comparison.
Pack energy: a reproducible comparison
For batteries connected in series, voltage adds while amp-hour capacity remains the capacity of the series string. Using the current official Trojan T105 and T875 capacity tables, checked October 10, 2026:
| Defined six-battery pack | 20-hour Ah rating | Nominal energy at that rating | 5-hour Ah rating | Nominal energy at that rating |
|---|---|---|---|---|
| Six T105 6V batteries: 36V | 225 Ah | 36 × 225 ÷ 1,000 = 8.10 kWh | 185 Ah | 36 × 185 ÷ 1,000 = 6.66 kWh |
| Six T875 8V batteries: 48V | 170 Ah | 48 × 170 ÷ 1,000 = 8.16 kWh | 145 Ah | 48 × 145 ÷ 1,000 = 6.96 kWh |
Our calculation makes the comparison explicit: at the 20-hour rating, the 48V example has only 60 Wh more nominal energy, about 0.74% above the 36V example. At the 5-hour rating the difference is 300 Wh, about 4.50%. The rate matters; these are not one fixed capacity at every current draw.
Even the 5-hour columns are different discharge currents, 185 ÷ 5 = 37A and 145 ÷ 5 = 29A. Multiplying nominal voltage by rated Ah does not integrate actual discharge voltage, set a usable depth of discharge or account for traction losses. It cannot establish equal range, a miles-per-charge promise or a better hill-climbing vehicle. No paired-cart range test is reported here.
For a used purchase, request battery identification, age and an appropriate condition assessment from the dealer. Compare the exact route, passenger/cargo load, tires and charging arrangement rather than applying a chemistry-wide range table. See our battery guide and range guide.
Lower pack current does not mean more power
In an illustrative equal-input-power case, 4,800W ÷ 36V = 133.3A, while 4,800W ÷ 48V = 100A. Both cases supply the same electrical input power. The current difference is a pack-side calculation; controller conversion, motor current, torque, gearing and efficiency remain unspecified.
If the compared cable resistance were identical, resistive loss would follow current squared times resistance. That conditional calculation does not prove cooler motor windings, faster acceleration or better whole-vehicle efficiency. Do not infer any of those from pack voltage alone.
Speed and road use require exact documentation
The official manual covering the MY2014 E-Z-GO TXT 48 Fleet specifies a 48V system with six 8V batteries and 10.2–14.8 mph on level ground. Its controller regulates speed. This is a specific historical model, not a specification for every TXT or a converted 36V cart. E-Z-GO manual, printed pages 7 and 22.
The federal LSV definition uses four wheels, a GVWR below 3,000 lb and attainable speed over 20 and no more than 25 mph in one mile on paved level ground. It does not prescribe a minimum 48V pack. That classification is separate from state/local permission for a particular road. 49 CFR 571.3. Check your state's rules before choosing a vehicle for that route.
Conversion: identify the whole system first
A voltage change requires an exact compatibility decision, not just replacement batteries. Have the vehicle manufacturer and relevant component suppliers document:
- Vehicle model/year and existing series, separately excited or AC configuration; motor voltage, thermal and operating limits.
- Controller, throttle and direction-control harness compatibility, programming and protective functions.
- Contactor/solenoid, cables, connectors, mounting, protection and accessory converter requirements.
- Battery/BMS current limits and behavior with regenerative braking; matched charger profile, charge connection and interlock.
- Vehicle braking, seating/load limits and any warranty or certification impact.
The cited TXT manual prohibits modifications that increase speed beyond factory specifications or adversely affect stability/stopping distance, and does not approve conversion of its products into LSVs. It also requires accessories outside its factory harness to draw from the whole pack through the appropriate converter, rather than tapping one battery. These are that manual's instructions, not a wiring recipe for another cart. E-Z-GO manual, printed pages 2–3 and 11.
A concrete owner's report shows why the harness belongs in that decision. On October 29, 2024, Cartaholics member bfunky described converting an early-2000s TXT from 36V to 48V using a Navitas DC-to-AC kit. After adapting an already modified harness, reverse did not work correctly. On October 31, he reported a mistaken connection that melted wiring, other inherited harness problems and a screw through direction-switch wiring; replacing the harness resolved the reported operation issue. The exact model year and supplier-approved configuration were not established. This is one owner's report, not an installation method or evidence every conversion will fail. Primary account and follow-up.
Compare complete costs
Get dated itemized quotes for each exact cart and any approved work. Include battery/charger condition, installed labor, tax, fees and expected repairs. Do not assume a cheaper voltage category or a fixed conversion budget.
For example, hypothetical costs of $2,500 purchase + $1,200 batteries + $200 charger + $250 electrical work + $400 tires/brakes total $4,550. These are illustrative inputs, not observed prices or a documented service case. Compare that total with an actual alternative quote; no resale premium is assumed.
Use a used-cart inspection guide and ask a local service provider to identify undocumented modifications before buying. Keeping the existing voltage or selecting a factory configuration can be considered only after the specific cart's condition and intended use are established.
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