Cole Hersee FlexMod 10A Battery Isolator Controller Unit 32VDC - Boxed - 48540

Cole Hersee

Request Quote
1.30 LBS
Special Order Available:
Increments of 1

The Cole Hersee FlexMod Smart Battery Isolator Controller 48540-BX monitors two battery banks and controls one or more relays or contactors to make sure starting power is protected by isolating the starting and auxiliary battery banks. Turns any electromecanical solenoid or relay into a battery isolator and works with ECM controlled alternators. System will disconnect load after 1 sec of excessive current, and auto-recover after 10 seconds. Programmable unit can be setup with custom parameters by select authorized distributors.


  • Compact design (4” x 3” x 1”) unit is waterproof, dustproof and vibration-proof. Mounts anywhere on a vehicle, even places where road-splash is a problem. Sealed to IP67 standard
  • Isolates main and auxiliary batteries when system voltage drops below 12.7 Vdc, and automatically reconnects battery banks at 13.2 Vdc. Preserves starting power; eliminates downtime and jump starts due to dead batteries
  • Start assist feature provides boost to starting battery, when needed
  • Compatible with modern electronically controlled alternators (some diode Battery Isolators are not). Smart Battery Isolator Controller eliminates false battery warnings created by diode isolators
  • Status light output drives remote light, informing operator when banks are connected
  • Unit is autoranging - senses 12V or 24V systems


  • Cole Hersee Part No.: 48540-BX
  • Package Type: Boxed
  • Series: FlexMod Battery Isolator Controller
  • Description: FlexMod Battery Isolator Controller Unit
  • Case: Blue Thermoplastic
  • Continuous Current: 10A
  • Voltage: 32 VDC
  • Mounting: Four 9/32" (7.2mm) dia. holes
  • Size: 4.0 x 2.7 x 1.3" (102 x 69 x 33mm)


  • Flexmod 8-Pin Deutsch Harness Accessory 12805

Product Condition: NEW

Shop Products

Services Beyond Parts

Purchasing and Sourcing Purchasing and Sourcing

Find the right part, material from our huge global network of resources.

Learn More
Solutions and Capabilities Solutions and Capabilities

Need help solving a problem, prototyping a solution or some other specialized skills.

Learn More
Engineering Solutions

Reverse engineering, 3D modeling, testing and part improvement expertise.

Learn More
Wholesale Accounts Wholesale Accounts

Leverage buying power, gain industry insight and stay connected at a large scale.

Learn More
“More than just a parts website. The account manager helped us plan ahead with inventory so we could avoid disruptions with our production schedule. Their engineering resources were available to assist with our application requirements. Highly recommend this team!”
— Satisified Customer


Talk to an Expert Account Manager who can help support your business.

Get Details