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January 25, 2022

High Power 48V battery chargers with very low noise for marine, display room, and trade shows

1340 watt power supply for marine and commercial audio use line drawing of the high power low noise audio power supplies
6V, 12V, 18V, 24V, 36V and 48V battery chargers for lead acid, SLA, VRLA, gel batteries12 and 24 volt lead-acid chargers
36 volt battery chargers 36 volt switchmode battery chargers
24 volt high efficency, high power lead acid battery chargers 24 volt switchmode battery chargers
48 volt sealed lead acid and VRSLA batteries More 48 volt switchmode battery chargers

Summary: Batteries are not susceptible to ripple and noise, so many high power battery chargers have limited filtering and put out significant 60 or 120 Hz ripple and noise. Others used pulse charging technology. This causes havoc with systems such as audio systems that would like a nice, clean voltage. This line of chargers are designed to charge a battery at high power, but very quietly.

Suggested Applications: Wherever a high power 48 volt battery charger is used, for example in in Audio Displays, Demo & Show Vehicles Marine & Recreational Vehicles; Battery maintenance & storage, Retail Store Displays, Industrial Applications, Communications (available in 12V , 36V . and 48V output).

These chargers are the famous DLS power supplies with 48V taper charging. The optional APS-IQ4 charge controller allows the DLS charger to operate as an automatic 3-stage “smart charger.” This gives a sophisticated charger with Bulk, Absorption, and Float stage charging, increasing the charging capacity of the APS Power Supply to decrease charge times, insuring proper and safe battery charging and eliminating over-charge. This “intelligent” technology monitors the battery at all times.
Ideally suited for the 48V telecommunication systems. The power supplies feature regulated and filtered outputs which allow for clean power busses without the slightest hint of noise.
In maintenance mode the charger is left connected to the battery. If the voltage remains in the long term stage for more than seven days, the charge controller will automatically deliver a boost charge for a short time, then automatically return to the normal float stage to prevent sulfation.
Virtually Silent Operation. This is a switchmode design using frequencies beyond that of human hearing, there is no low frequency transformer hum. The cooling fan is virtually silent.
The PST-DLS 48V battery chargers all feature thermal control circuitry that engages the fan only when internal temperatures require it (typically 75% of full load). They have small compact sizes compared to the transformer based power chargers. The switch mode technology utilized in DLS power chargers has 86% efficiency. This superior design results in cooler operating temperatures and compact size.

Summary table high power 48 volt lead acid battery chargers
Model number Continuous Amps Input Voltage Charging Watts Weight Charge algorithm Dimensions Mounting Drawing AC Service Required Price
(54V output for taper charging 48 volt batteries)
13A 108-132 VAC
47-63 Hz
702W 7.8 lbs Taper 13x6.5x3.5 inches click here for mounting drawing 870VA $413.00
3 year warranty
20A 110VAC or 220VAC 1090W 12 lbs 2 or 3 Stages user selectable 14.5 x 9.9 x 5.5 inches   1606VA $1276
Click to see the PBCA1050 page
APS-IQ4 IQ4 controller, turns the APS series into multi-stage chargers by inserting its control cable into the control socket of the APS   $28.00
PST-APS-HK4 8 foot, 4 gauge hook-up kit with quick-release connectors               $74.00
* These are designed to exceed UL requirements.

Parameter Value    
Battery 48 Volt sealed lead acid, flooded lead acid, VRLA, gel, or AGM    
Output voltage 48 volt taper charge model 54.4 Volts 48VDC taper (constant voltage with current limit) charger. This charger can be left on indefinitely without overcharging the battery, since the taper voltage is the float voltage.  
Output voltage 48 volt models 59V Bulk charge phase
56.6V Absorption charge
54.2V Float charge phase
This charger can be left on indefinitely without overcharging the battery. The float charge phase keeps the battery maintained to prevent sulfation.  
Output voltage tolerance ±0.7% no load  
Maximum ripple and noise 100 mV RMS    
Input voltage rage 108-132 VAC    
Input frequency 47-63Hz    
Typical efficiency >80%    
Short circuit protection Yes    
Overload protection Yes    
Line regulation <1%    
Load regulation <1% at output terminals  
Recommended output wire gauge 4 AWG    
Output terminals 4 AWG screw terminals    
Fan control Proportional-- Fan only comes on when needed  
Fan type Special ultra low audio noise fan     
Over temperature protection 80°C Turns off  
Ambient temperature 0°C to 40°C    
Storage temperature -20°C to 80°C    
Warranty 2 Years    

Usage Note: Typical AC outlets are 1540VA, 14 amp service. To run the higher power units you will need higher power service than is typically available in a wall plug. Please consult competent technical authorities to determine the total load on the circuit you intend to supply the power with, including other things plugged into the same circuit.

Maintenance mode: After the 48 volt battery is full the charger goes into a maintenance mode. In maintenance mode the battery is safely floated at 54.2 volts to maintain the battery and replace charge lost due to leakage or self discharge. In addition, if the battery has not received a bulk charge during a seven-day period, the charge controller will switch the APS Power Supply into a pre-programmed equalization stage to top off the batteries, dissolving any sulfate layer on the plates of the battery and avoiding stratification of flooded batteries.

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High power 48 volt low noise battery chargers, 48V battery chargers for electric vehicles

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