Flexcharge NC25A-12, Manual

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Page 9 of 24
Operating Characteristics
Flexcharge NC25A-12 (24,36,48) Min. Max.
Charge Input Voltage 0Vdc 140Vdc
Allowable Battery Voltage on Sense Wires
12V Systems
(Multiply by 2, 3, or 4 for 24V, 36V, or 48V Systems)
0Vdc 16Vdc
Standby/Operating Current of the Controller 2mA 7mA
Charging Amperes 0.005A 25A
Short Term Over-Current (1/2 Second Maximum) - 50A
Total Charging Efficiency 98.9% 99.8%
Insertion Loss Resistance (Ohms)
0.001

0.004

Charge Divert Current 0A 25A
Charge Divert Over Current (1/2 Second) - 50A
Transient Surge Protection (20uS) 1500VA
Operating Temperature -40°C +60°C
Storage Temperature -55°C +60°C
Case Dimensions
4”W x 3.75”H x 1.5” D
NOTE: this is not a MPPT controller. For solar panel use do not series the panels for higher
voltage inputs. This will reduce the amperage input of the panels to the batteries.
HOOKUP WIRE SIZE CHART
This chart provides the minimum wire size to minimize power loss. Larger wires
would are always better for operating efficiency
Max Charging Capacity WIRE SIZE FOR 1 TO
10FT LENGTHS
WIRE SIZE FOR 10 TO
20FT LENGTHS
OA TO 3A #14 AWG #12 AWG
3A TO 6A #12 AWG #12 AWG
6A TO 12A #10 AWG #10 AWG
12A TO 18A #10 AWG #8 AWG
18A TO 25A #8 AWG #8 AWG
Diode Selection Table
Ampere Rating Voltage Rating Part Number Type Manufacturer
1A 40V 1N5819 Schottky Diodes Incorporated
3A 40V 1N5822 Schottky International Rectifier
5A 100V 50SQ100 Schottky International Rectifier
8A 45V 80SQ045 Schottky International Rectifier
1A 400V 1N4004 Silicon Diodes Incorporated
3A 400V 1N5404 Silicon Diodes Incorporated
6A 1000V 6A10 Silicon Diodes Incorporated
If you cannot find these parts locally, call Flexcharge USA. Many of the above diodes are in stock.