GX4820  48V 20A UltraSafe Industrial Battery Charger

20 Amp UltraSafe Industrial Battery Charger

The GX4820 is a high-frequency, high-efficiency industrial battery charger for electric vehicles, like a golf cart, scissor lift, pallet jack, floor care machine or utility vehicle. It represents the latest technology for fast and efficient battery charging with multiple charging modes at a push of a button. It's universally adaptable design allowed for global use with replaceable A/C and D/C cables and designed for all types of deep-cycle lead-acid and lithium-ion batteries. And suitable for both on-and-off board applications.
  • A 92-percent high-efficiency 48V industrial battery charger.
  • Wide-range input voltages from 100-240VAC, 50-60Hz.
  • Charges lead-acid and lithium-ion batteries up to 425 amp-hours.
  • Integrated inhibit and remote LED functions.
  • Converts to a power supply for zero voltage charging.
  • Progressive repair method for sulfated batteries.
  • Spark-proof technology and reverse polarity protection.
  • Advanced diagnostics indication for damaged batteries.
  • Designed for rugged environments and rated at IP66.
  • WARNING: California’s Proposition 65
You save 21%
MSRP $699.95
In Stock
UPC: 0-46221-15008-7
13.20lbs | 12.00 × 10.80 × 3.90
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The next generation of charging electric vehicles.

The most advanced industrial battery charger in its class.

Not only can it charge a wide-range of deep-cycle lead-acid and lithium-ion batteries, but it's as simple as a push of a button - no dip switches or downloadable software. And it's paired with a robust battery repair method to combat battery sulfation and recover lost battery capacity, plus easily converts to a constant current, constant voltage power supply for zero voltage charging or equalizing unbalanced batteries.

48V Industrial Battery Charger For Lead-Acid Deep-Cycle Batteries

48V Norm Mode

Designed for charging deep-cycle 48-volt lead-acid battery systems, including Wet Cell, Gel Cell, Enhanced Flooded, Calcium, and Maintenance-Free.

48V Industrial Battery Charger For Lead-Acid Deep-Cycle AGM Batteries

48V Cold/AGM Mode

Designed for charging deep-cycle 48-volt AGM battery systems, or all types of lead-acid 48-volt battery systems in cold temperatures below 50ºF (10ºC).

48V Industrial Battery Charger For Lead-Acid Deep-Cycle Advanced AGM Batteries

48V AGM+ Mode

Designed for charging 48-volt advanced AGM battery systems, which requires a high charging voltages for deep cycle battery applications.

48V Industrial Battery Charger For Lithium-Ion Batteries

48V Lithium Mode

Designed for charging 48-volt lithium-ion battery systems that include a battery maintenance system (BMS), including lithium iron phosphate batteries.

Universally adaptable.

Universal input with swappable A/C and D/C cables.

A versatile industrial battery charger designed for worldwide use. Its internal magnetics and power design handle a wide-range of input voltages from 100-240VAC and frequencies from 50-60Hz. And with its removable A/C and D/C cords, it’s simple to change cables for each country or application - all in a water-resistant strain relief clamping system.View GX Series Accessories

92% efficiency.

Ridiculous power in a small space.

With over 960-watts of pure power, the GX Series uses incredible thermodynamics to deliver the most compact, yet powerful industrial battery charger ever. Rather than only using heat sinks, we designed a precision aluminum unibody that maximizes not only airflow but also thermal capacity.

New industry standard.

Expertly designed. Precisely engineered. Manufactured tough.

An industrial battery charger that's designed to last even the most rugged and harsh operating environments. Whether used as an on-board or off-board battery charger, its robust aluminum unibody design withstands shock and vibration for endless hours of operation. Its over-molded strain reliefs prevent unwanted stress on the cables while providing a water-resistant seal.

48V Industrial Battery Charger With Inhibit Function

Inhibit Feature

The inhibit function prevents electric vehicles from moving while charging, which prevents accidental damage to the connected cabling system. The inhibit port contains a 20A relay that closes when connected to A/C power and disables the vehicle.

48V Industrial Battery Charger With Repair Mode

Repair Mode

Repair Mode is an advanced battery recovery tool used to remove sulfated batteries, and regain lost battery capacity. It uses a combination of high voltage and low current to melt down sulfation and return it to the active material again.

48V Industrial Battery Charger With Supply Mode

Supply Mode

Supply Mode converts the industrial battery charger into a constant current, constant voltage power supply for zero voltage charging for troubleshooting low voltage batteries or equalizing unbalanced battery system for longer battery life.

48V Industrial Battery Charger Rated At IP66

Ingress Protection

Industrial battery charger applications get exposed to some of the toughest, and most extreme operating environments. Whether an on-board or off-board application, these chargers are shock, vibration, water, dirt and dust proof and rated at IP66.

Advanced diagnostics.

Battery charging with intelligence.

Smart industrial battery chargers can be frustrating. They do not simply begin charging upon detecting a weak or damaged battery. Sometimes they will begin force charging if they detect an unsafe or abnormal charging condition. But prevention is just one aspect. Understanding and finding a solution is just as critical. Welcome to Advanced Diagnostics, which analyzes battery feedback and display a particular error pattern if a problem is detected. Each flash pattern tells you what's wrong, and how to quickly fix it.
Single Flash: Battery will not hold a charge and should be checked by a professional.
Double Flash: Possible battery short, and should be verified by a professional.
Triple Flash: Battery voltage is too high for the selected charge mode. Double check the battery matches the charge mode.
Error LED Solid Red: Reverse polarity. Reverse the connections to the battery.
Standby LED Solid Orange: Battery voltage is too low for the battery charger to detect the battery.

48V Industrial Battery Charger With Optimization Feature


Stabilizes the internal battery chemistry for increased battery performance and longevity by optimizing the batteries internal specific gravity.

48V Industrial Battery Charger With Maintenance Plus Feature

Maintenance Plus

A powerful battery maintenance charge that monitors battery activity, but also provides a finishing charge every 24-hours, keeping batteries fully charged.

48V Industrial Battery Charger With Interactive Feature


Dynamically alters the charging process based on organic battery feedback allowing for precision battery charging.

48V Industrial Battery Charger With Recovery Feature


When detected, it applies a high-voltage low-current pulse charge causing battery sulfation to convert back to the active material, regaining lost battery capacity.

48V Industrial Battery Charger With An UltraSafe Design


Protects against reverse polarity, sparks, overcurrent, open circuits, short circuits, overheating and overcharging.

48V Industrial Battery Charger With Firewall Feature


We don't design something that merely works, but remains safe after a major failure. So we built-in redundant levels of safety protection.

48V Industrial Battery Charger With Opportunity Charging

Opportunity Charging

Intended to recharge the maximal amount of energy while the electric vehicles are not in use - lunch time, breaks or intermittent use.

48V Industrial Battery Charger With 1-Year Limited Warranty

1 Year Warranty

Our battery chargers are built to last. That's why we back it up with an unbeatable warranty and combine it with unparalleled customer service.

Efficient design.

Compact, yet powerful industrial battery charger.

A mix of electrical engineering and industrial design create a powerful battery charger into a tiny footprint. It uses high-frequency switch-mode technology to efficiency convert A/C power into safe D/C power for battery charging. And it's onboard microcomputer precisely controls the charging to minimize power loss to create an incredibly compact form factor.

Technical Specifications.

What's In The Box

  • GX4820 48V Industrial Battery Charger
  • Integrated D/C Cable with Eyelets
  • Integrated A/C Cable with Type B Plug
  • User Guide & Warranty Information

Input Voltage AC

100-240V, 50-60Hz


960W (Max)

Battery Capacity

For Lead-Acid and Lithium-Ion Batteries up to 425Ah



IP Rating


AC Cord Length


DC Cord Length



13.2 Pounds