Your Ford 4000 (1965-1975) is a legend — but converting it to electric changes what "battery" means. Once the diesel engine comes out, you no longer need a 12V starting battery with cold cranking amps. You need a high-voltage traction battery pack that carries the energy for hours of field work. That is the single biggest cost in your conversion, and most US brands will quote you $8,000-$12,000 for a 20 kWh pack. CMVTE ships the same LiFePO4 chemistry, with BMS included, factory-direct from $4,200.
Ford 4000 Tractor Battery Pack Cost: CMVTE vs US Brands
| Pack Size | Configuration | US Brand Price | CMVTE Factory Price |
|---|---|---|---|
| 15 kWh (light duty) | 144V 105Ah | $6,500 – $9,000 | $4,200 |
| 20 kWh (standard work day) | 96V 210Ah | $8,000 – $12,000 | $5,800 |
| 35 kWh (heavy / dual pack) | 339V 105Ah | $14,000 – $20,000 | $9,500 |
Every CMVTE pack ships complete with the battery management system (BMS), charge and discharge relays, fuses, precharge resistor, and CAN communication support — components US brands often sell separately. The factory-direct battery price you see is what you pay, including freight.
Choosing Voltage: Match Your Motor, Not Your Diesel
The old diesel started on a 12V battery, but your electric motor runs on a high-voltage pack. The right voltage depends on the motor and controller you choose:
- 96V / 144V systems — ideal for the Ford 4000. A 15-25 kW motor at this voltage handles light tillage, mowing, and loader work with a simple, low-cost controller. Packs at this voltage are the most affordable per kWh.
- 169.6V / 339V systems — for higher-horsepower builds or tractors doing heavy PTO work all day. Higher voltage means less current for the same power, so thinner cables and better efficiency — at a higher pack cost.
If your goal is a daily-work tractor that plows, mows, and hauls feed, a 96V or 144V pack in the 15-20 kWh range is the sweet spot between cost, range, and motor compatibility.
Why LiFePO4 Beats AGM for an Electric Tractor
If you are reading about AGM and lead-acid battery options, remember those are starting batteries — designed to dump a huge current for three seconds and never get deeply discharged. An electric tractor needs the opposite:
- Deep discharge capability: LiFePO4 can safely cycle to 80-90% depth of discharge every day, for 2,000-3,000 cycles (roughly 8-10 years of farm use). Lead-acid dies quickly if regularly discharged past 50%.
- Cold weather performance: LiFePO4 operates down to -20°C. On a cold barn morning, your pack holds most of its capacity while lead-acid loses up to 40%.
- Vibration and dust resistance: Farm work is brutal. CMVTE packs use rigid welded busbars and potted electronics designed to survive constant vibration, dust, and moisture.
- Weight advantage: A 20 kWh LiFePO4 pack weighs roughly a third of the equivalent lead-acid bank — over the rear axle, exactly where a tractor needs ballast.
Sizing a Pack for Real Field Hours
A Ford 4000 doing mixed farm work consumes roughly 4-6 kW of average power. That math gives you your run time:
- 15 kWh pack: about 2.5-3.5 hours of continuous work — enough for light chores, loader work, and mowing.
- 20 kWh pack: about 3.5-4.5 hours — a full morning or afternoon of field work on one charge.
- Two 20 kWh packs (40 kWh): a full 8-hour working day, with one pack charging while the other runs.
Most owners choose a 20 kWh 96V pack as the first build and add a second pack later if they need longer days. The packs connect in parallel through a simple combiner box, and the BMS handles the sharing automatically.
Keep the 12V Side Alive
Even after conversion, your Ford 4000 still needs 12V for lights, gauges, and the starter solenoid. A 144V-to-12V DC-DC converter (which CMVTE also supplies) steps down from the traction battery to run all your original 12V accessories. This is covered in depth in our companion guide on selecting a DC-DC converter for your electric Ford 4000.
Get Your Pack Sized and Quoted
Tell CMVTE the Ford 4000 model, what work it does, and your target run time. Our engineers will recommend the voltage and capacity, confirm it fits your chassis, and send a fixed battery quote with shipping to your port within 24 hours.
Contact CMVTE now — get your Ford 4000 battery pack quote within 24 hours.
