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Lester Summit Series II 36V/48V 650W Battery Charger (Multi-Volt)- Charger Only


$ 440.00

SKU: SS3648-650W Category:

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The Summit Series II from Lester is the smartest battery charger on the market today. Designed to charge all battery types, including Wet/flooded, AGM, gel, deep-cycle lead-acid and even lithium-ion. Now with current limit, short circuit, reverse polarity, under voltage, over voltage, wrong battery voltage protection. Bluetooth Smart Wireless Apps for Apple and Android phones or tablets. This industrial battery charger is designed for 36 or 48 volt battery systems and is built using the latest charging technology. The Summit Series II chargers are industrial-grade battery chargers with a brain. Well suited for use in both specialized applications, such as floor care, industrial vehicles, and aerial work platforms, as well as general-purpose deep-cycle charging applications like the Duffy boat or golf carts. The next-generation charge control platform (Charge Connect from Lester) Industry-leading intelligence and features not found in any other charger that costs hundreds more.

Standard Features on the Summit Series II 36/48 Volt Battery Charger

  • 36v/18A or 48v/13.5A – (650 Watts) Multi-voltage support
  • AC Side Power Cord – DC Side Cable with choice of connector plug type
  • Automatic DC Output Voltage Detection and Adjustment
  • Bluetooth Smart Wireless Communication
  • Apps for Apple® and Android TM phones and tablets
  • View charge cycle status
  • Time remaining, time elapsed, current, voltage, amp hours, phase, faults
  • Select the active charge profile
  • Upload new charge profiles to the charger
  • Download charge cycle history records
  • Cloud connectivity via the app
  • Download new charge profiles from the Cloud
  • Upload charge cycle history records to the Cloud for access anywhere in the world
  • Over 200 charge cycle history records stored on the charger
  • CAN bus communication standard
  • Vehicle / machine integration
  • Lithium-ion BMS communication
  • External DC and signal connections
  • Lockout / interlock, remote LED, and battery temperature sensor
  • Switch mode (high frequency) technology
  • Best-in-class efficiency
  • California Energy Commission (CEC) and Department of Energy (DOE) compliant
  • Low DC output ripple
  • Industry-leading charging performance and intelligence
  • Wet/flooded, AGM, gel, and lithium-ion charge profiles
  • Progressive DV/DTTM charge algorithm support
  • On-board (built-in) or off-board (shelf) charging
  • Universal AC input with IEC inlet
  • 85-265 Vac, 45-65 Hz
  • Sealed enclosure, IP66, NEMA 4
  • High reliability, durability, and longevity
  • Intelligent natural convection cooling (no fan)
  • Leading temperature vs output power performance
  • Safety/regulatory approvals
  • UL recognized/listed, cUL/CSA, CE/EN, RCM/RCM, FCC, ICES, CEC, DOE


  • Voltage range, rated 100-240 Vac
  • Voltage range, operating 85-265 Vac (< 108 Vac: reduced power) Frequency, rated 50-60 Hz Frequency, operating 45-65 Hz Phase Single-phase Current, maximum 8 A Efficiency > 91.5% peak, CEC test procedure, 115 Vac, AC and DC losses included
  • Protection Current limit, surge, transient, under voltage, over voltage


  • Power 650 W
  • Voltage, nominal – 36VDC – 48VDC
  • Voltage, maximum – 54 VDC – 72 VDC
  • Current, maximum – 18 Amps – 13.5A
  • Voltage, min start-up 10 Vdc


  • Bluetooth Smart Wireless Apps for Apple and Android phones and tablets
  • LEDs Charge Complete (green), Charge Status (yellow), AC Present (blue), Fault (red)
  • Remote LED Single tri-color; charge complete, charge status, fault; output standard;
  • Lockout / interlock Single wire
  • Battery temperature Input standard; sensor optional
  • CAN bus communication CANopen ® standard

Special Note to determine the right charger for you and your application:

On-Board chargers are designed to be mounted on electric vehicles/equipment. While the DC output is connected to a battery pack of the proper voltage, a charge cycle automatically starts when the AC input plug is connected to AC power (unless a safety period of time has not passed since the successful completion of the previous charge cycle). Disconnecting the DC output from the battery pack IS NOT REQUIRED to automatically start a new charge cycle. Off-Board chargers are designed to be used in shelf or portable applications. While the AC input plug is connected to live AC power, a new charge cycle automatically starts when the DC output is connected to a battery pack of the proper voltage. Disconnecting and reconnecting AC power while the DC output remains connected to a battery pack WILL NOT automatically start a new charge cycle. Disconnecting the DC output from the battery pack IS REQUIRED to automatically start a new charge cycle.


Dimensions (LxWxH), 11.297 x 7.172 x 3.641 in (287 x 183 x 93 mm)

For Off-Board applications – Removable feet and Handle Optional – Not included


Enclosure rating IP66, NEMA 4 Operating temperature -25 °C to 60 °C (-13 °F to 140 °F) Storage temperature -40 °C to 85 °C (-40 °F to 185 °F)

Learn More and Download the app for your phone



Weight 12 lbs
Dimensions 9 × 9.9 × 12.8 in

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