48V 460Ah LiFePO4 Battery Pack for Electric Robot Lawn Mower

48V 460Ah LiFePO4 Battery Pack for Electric Robot Lawn Mower

In September 2025, a commercial robotic mower maker contacted CM Batteries.They had a structural limit their current supplier could not fix. Scaling to large areas like golf courses, corporate campuses, and early solar farms required a bigger battery. They needed more than their prior 200Ah capacity.
But the mower chassis had no single cavity large enough for a pack that size. They also needed the new battery pack design to meet a 2,000-cycle durability target for nonstop outdoor fleet use. Their previous packs had consistently missed this benchmark.

CM Batteries worked on a long engineering cycle. They designed, tested, and delivered a custom 15S2P dual-enclosure 48V 460Ah LiFePO4 battery pack. It fit the existing chassis without redesign. It also met the client’s cycle-life and IP65 durability requirements.

Electric Lawn Mower Robot Customer Overview

The customer designs and manufactures autonomous robotic mowers for commercial and institutional grounds, with deployments spanning golf courses, corporate campuses, and large estates. Their product roadmap is expanding into solar farm vegetation management. In this segment, units must cover much larger unattended areas per duty cycle than residential robotic mowers. A single battery failure can disrupt an entire site’s maintenance schedule, not just one household unit.
For a fleet-focused customer like this, battery choice is not based on capacity alone. Cycle life drives fleet replacement costs. Enclosure strength affects unplanned downtime. It also affects how much downtime the customer’s end users will accept. If downtime is too high, they may switch to a competing mower brand.

No Single Enclosure Could Fit the Required Capacity

The mower chassis had two separate cavities for battery installation, and neither could fit a 460Ah pack alone. This ruled out a conventional single-box design.

CMB Solution:
Built a 15S2P setup split across two separate enclosures. It uses a 10S2P section with the central BMS. It also uses a 5S2P section with an independent DC air switch. This matches the two available chassis cavities.

Cycle Life Was Falling Short of the Fleet Target

Prior packs wore out faster than the customer’s 2,000-cycle cost benchmark. They were used nonstop in commercial service. This led to unexpected replacement costs for the fleet.

CMB Solution:
Selected EVE LiFePO4 LF230 cells for consistent cycle life in this capacity class. Engineered for a 2000+ cycle target under continuous outdoor duty cycles.

Field Downtime from Hard-to-Service Battery Architecture

A large series-parallel string that cannot be partly isolated makes field diagnostics and service slower. This adds real costs for fleet operators managing many units across a large site.

CMB Solution:
Added a DC air switch to the small enclosure for independent isolation. Added a fuse to each voltage sampling line for circuit-level fault protection. This allows service without disconnecting the full pack.

48V 460Ah LiFePO4 Battery Pack

48V 460Ah LiFePO4 Battery Pack Design for Robotic electric lawn mower（15S2P Dual-Enclosure）

Product Highlights

  • Configuration: 15S2P — 10S2P large enclosure (with BMS) + 5S2P small enclosure (with DC air switch), connected via external wiring
  • Nominal voltage: 48V
  • Capacity: 460Ah
  • BMS discharge current: 150A continuous
  • Cycle life target: 2000+ cycles under continuous commercial duty cycles
  • Enclosure protection: Aluminum alloy, IP65-rated (dust and low-pressure water ingress protection)
  • Safety feature: Fused voltage sampling lines, independent DC air switch on small enclosure, NTC temperature monitoring
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48V 460Ah E-mower Robot LiFePO4 Battery Pack Parameter

No. Item Specification Note
1 Nominal Voltage 48V 3.2V/Cell
2 Nominal Capacity 460Ah @0.2C
3 Minimum Capacity ≥450Ah /
4 Initial Internal Impedance ≤12mΩ AC 1KHZ
5 Standard Charge Voltage 54.75V 3.65V/Cell
6 Standard Charge Current 92A @0.2C
7 Max Charge Current 230A BMS Limit
8 Standard Discharge Current 100A @0.2C
9 Max. Discharge Current 150A /
10 Discharge Cut-off Voltage 37.5V 2.5V/Cell
11 Cycle Life ≥2000 cycles Retention: ≥80%
12 Charge Temperature 0°C~55°C Standard Charge
13 Discharge Temperature -20°C~60°C Standard Discharge
14 Storage Temperature -20°C~ 45°C ≤3 Months
0°C ~ 25°C ≤1 Year
15 Weight About 145kg /

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48V 460Ah LiFePO4 Robot Electric Lawn Mower Battery Pack FAQs

How is a 460Ah LiFePO4 battery pack fitted into a mower chassis with limited space?

By splitting the series-parallel string across two physically separate enclosures — for example, a 15S2P configuration divided into a 10S2P section with the BMS and a 5S2P section with an isolation switch — connected via external wiring rather than requiring a single oversized housing.

What cycle life should a commercial robotic mower battery target?

For continuous commercial duty cycles, 2000+ cycles is a meaningful engineering target, notably above the 800-1000 cycle range typical of packs designed for intermittent residential use.

What IP rating is needed for outdoor robotic mower batteries?

IP65 is generally appropriate for units that remain outdoors or in semi-exposed docking stations between duty cycles, protecting against dust ingress and low-pressure water exposure.

Can this battery platform support solar charging integration?

Solar-ready architecture, including reserved MPPT/charge controller interfaces, can be scoped as part of the pack design for OEMs targeting off-grid or hybrid charging — evaluated per project.

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