The price of a custom lithium battery pack comes from five things: the cells, the BMS, the enclosure and its tooling, certification, and your order volume. Cells are usually the biggest cost item. Tooling and certification are one-time costs, and they matter most on small orders. If you know which lever moves the price, you can compare quotes properly and avoid paying for specs you don’t need.
Key Takeaways
- Average lithium-ion pack prices fell to $108/kWh in 2025. LFP packs averaged $81/kWh and NMC packs $128/kWh (BloombergNEF, December 2025).
- Those averages come from high-volume EV and storage packs. Small custom packs cost more per kWh.
- One-time costs (tooling, certification, BMS firmware) should be listed separately from the unit price.
- Over-specifying capacity, peak current or cell brand is the most common reason quotes come in too high.
What Is a Realistic Benchmark for Battery Pack Prices?
BloombergNEF’s 2025 survey put the global average pack price at $108/kWh, down 8% from 2024. Stationary storage packs averaged $70/kWh, and China had the lowest regional average at $84/kWh (BloombergNEF).
Use these numbers as a floor, not a target. They describe packs made by the million. A 200 Wh pack for a medical cart or a 50 Wh pack for a heated jacket costs more per kWh because engineering, BMS, enclosure and testing costs are shared across far fewer units.
What Drives the Unit Price?
| Cost driver | What raises the price | What lowers the price |
|---|---|---|
| Cells | Tier-one brand, high-rate cells, small quantities | Right-sized capacity, LFP where weight allows, standard formats |
| BMS | Communication (CAN, SMBus), fuel gauge, high current, active balancing | Simple protection board if the device doesn’t need data |
| Enclosure | Custom injection-moulded case, IP67 sealing, metal housing | Heat-shrink soft pack or a standard case |
| Assembly | Many cells, complex wiring, potting | Fewer, larger cells |
| Testing | Cycle testing and 100% burn-in | Standard end-of-line testing |
Cells
Chemistry and brand decide most of the cell cost. LFP packs averaged about 37% less per kWh than NMC packs in 2025 (BloombergNEF). LFP is heavier for the same energy, though, so it suits carts, forklifts and storage better than handheld devices. See LiFePO4 vs NMC for the trade-offs.
BMS
A basic protection circuit costs much less than a smart BMS with a fuel gauge and CAN bus. Only pay for communication if your device will actually read the data. Our PCM vs BMS guide explains the difference.
What One-Time Costs Should You Expect?
One-time costs, also called NRE (non-recurring engineering), are usually quoted separately:
- Engineering and samples: design work plus the first prototype batch
- Tooling: injection moulds for custom cases, and fixtures for welding and testing
- BMS development: custom PCB layout and firmware
- Certification: UN38.3 is almost always needed. IEC 62133-2, UL or market marks are added depending on where you sell. See UN38.3 explained.
If a pack uses an existing enclosure and an existing BMS, most of these costs disappear. Ask your supplier whether a standard battery pack or a modified existing design would meet your specification.
How Does MOQ Work for Custom Packs?
MOQ (minimum order quantity) for a custom pack depends on three things:
- Cell purchasing: tier-one cells are sold by the carton or reel, and some models have their own minimums.
- Tooling payback: a custom mould only makes financial sense above a certain volume.
- Production setup: line changeover and testing setup are fixed costs for each batch.
For small first orders, agree on a pilot batch at a higher unit price with a volume price table for later orders. This is usually cheaper overall than forcing a large first order.
How to Lower Your Quote Without Cutting Safety
- Right-size capacity. Base it on measured runtime, not a guess. Every extra parallel cell adds cost and weight.
- Check the real peak current. High-rate cells cost more. Use C-rate to size the cells correctly.
- Reuse a standard enclosure where the product design allows.
- Plan certifications for all markets at once. Testing one frozen design for several markets costs less than retesting later.
- Don’t cut cell grade, BMS protection or end-of-line testing. Those are what prevent field failures.
Frequently Asked Questions
Why is my custom pack more expensive per kWh than an EV battery?
EV and storage packs are made in huge volumes, so engineering, tooling and testing costs per kWh are tiny. Small custom packs carry the same fixed costs over far fewer units.
Is a cheaper cell brand a good way to save money?
Sometimes, but only if the cell has a complete datasheet, UN38.3 test summary and batch traceability. Unknown cells often show wider capacity and internal-resistance variation, which shortens pack life.
How do I compare quotes from different suppliers?
Ask every supplier to state the cell model, BMS specification, enclosure type, certifications included and NRE separately. Also see manufacturer vs distributor for what each type of supplier can control.
Get an Itemized Quote
Send your specification through our custom battery pack service. Jetray itemizes cells, BMS, enclosure, NRE and certification so you can see exactly where the cost goes. The full process is described in our pack development guide.
