Product: Daygreen DC DC 48V Step Down to DC 12V 20A Buck Converter 36V to 12V Voltage Regulator Reducer for Golf Cart Club Car
Brand: Daygreen
 
Wiring: OUTPUT+ to LOAD+, OUTPUT- to LOAD-; INPUT+ to BAT+, INPUT- to BAT- 
Reminder: 
Never connect to solar panel or wind turbine. 
Never charge the battery. 
Never reverse the polarity. 
Use the enough big cable to avoid the voltage drop. Keep good air convection.  

Daygreen P/N: B20-3648-12 
Efficiency: 95% 
Input Voltage: 40-60VDC (36V/48V battery)
Output Voltage: 12VDC 
Output Current: 20A 
No-load current: <0.1V 
Ripple: 200mVp 
Line Regulation: ±0.2% 
Load Regulation: ±0.2% 
Voltage Accuracy: ±1.5% 
Enclosures: IP68 
Dimension: 2.91*2.91*1.18 inch 
Net Weight: 0.573 lb 
Case Operating Temperature: -40-185℉(When temperature is over 104℉, you touch the case and will feel hot and this is very normal. When case temperature is over 185℉, then converter protects.) 
Certificates: CE Rohs 
Warranty: 1 year 
MTBF: 100,000 hours 
 
Application: 
36V/48V Lead acid/ lithium battery of vehicles as input power to 12VDC appliances as output load. 

Questions
How to choose the correct current for loads? 
For example, if the max current of your load device is 10A, then choose 10A/0.7=14.28A at least for resistive loads according to international standard. 
If the load device is motor or compressor, then you may choose 10A/0.5=20A according to real testing result since the motor and compressor starting current may be 2-3 times than nominal current.
【Better Price for Business Customer】OEM/ODM Manufacturer for 1000+ clients, 14-year manufacture experience, 22-year development experience
【ISO 9001: 2015 Certificate】EN 61000-6-3:2007/A1:2011/AC:2012 EN 55014-1:2006/A2:2011 EN 60950-1:2006/AC:2011
【Reliable Quality】High efficiency up to 95% ,100% full rated power and stable output voltage, 100% burn-in test and 4 times quality inspection, Aluminium shell with epoxy potting
【Multiple Protection】 Over current protection, Output over voltage protection, Output short circuit protection, Over temperature protection, Input Fuse built in-line protection, Waterproof IP68, Dust-proof, Anti-shock
【Fast After-service】Two years warranty, Good and fast after-service support, Extra free fuse, English manual for installation easily

Search query: 12 to 48 volt conversion
Relevance: Exact