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Flexcharge NC25A-12 User Manual

Flexcharge NC25A-12
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MANUAL
12V Controller Shown Below
Patented
Rev 04, Ver1
AUG 2018
MODEL: NC25A-12(24, 36, 48)
Ultra High Efficiency
25 Ampere Alternative Energy Battery
Charge Controller
For GEL, AGM, and Flooded Cell Lead Acid Batteries
Not for Lithium Batteries
SES Flexcharge USA, 1217 State St., Charlevoix, MI 49720
Ph: 231-547-9430, Web Site: www.flexcharge.com
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Flexcharge NC25A-12 Specifications

General IconGeneral
Nominal Voltage12V
Max Output Current25A
Output Voltage12V
Current Rating25A
Protection FeaturesOverload, Short Circuit
Operating Temperature-20°C to 60°C

Summary

IMPORTANT INFORMATION

Features

INSTALLATION INSTRUCTIONS

Divert Feature

Instructions for setting up the Divert Load feature, including wiring and fuse requirements.

Choosing the Right Divert Load

Guidance on selecting an appropriately sized divert load for the system.

Charge Indicator Light

Information on using the charge indicator light and its connections.

SETTING THE PEAK CHARGE ADJUSTMENT VOLTAGE

Setting a New Regulated Voltage

Steps to adjust the peak charge voltage for specific battery requirements.

Easier Calibration Method

An alternative method for calibrating the peak charge voltage setting.

DESCRIPTION OF MULTI FUNCTION INDICATOR OPERATION

THE FLEXCHARGE ENERGY STATE TAPER CHARGE METHOD

OPERATING CHARACTERISTICS

Hookup Wire Size Chart

Provides minimum wire sizes for different charging capacities and lengths.

Diode Selection Table

Lists part numbers, types, and manufacturers for suitable diodes.

USING OR NOT USING BLOCKING DIODES ON YOUR PV CHARGING SYSTEM

What is a Blocking Diode?

Defines a blocking diode as a one-way valve for electricity.

Function of Blocking Diodes

Explains how diodes prevent backflow and voltage spikes to panels.

Blocking Diodes for Panel Types

Details diode usage for Single Crystalline, Poly Crystalline, and Amorphous panels.

SOLAR PANELS CHARGING ONE BATTERY BANK

Caution Statements

Important warnings about controller damage during installation and battery charging.

SOLAR PANELS CHARGING TWO OR MORE BATTERY BANKS

Caution Statements

Warnings related to controller damage and battery connections in dual bank systems.

WIND CHARGING SYSTEM WITH ONE BATTERY BANK

Caution Statements

Warnings about controller damage during installation and battery charging for wind systems.

WIND CHARGING SYSTEM WITH TWO OR MORE BATTERY BANKS

Caution Statements

Warnings regarding controller damage and battery connections for dual bank wind systems.

CHARGING FROM WIND AND SOLAR AT THE SAME TIME INTO ONE BATTERY BANK

Caution Statements and Important Notes

Warnings on controller damage, load resistors, and critical diode requirements for combined systems.

CHARGING FROM WIND AND SOLAR AT THE SAME TIME, INTO MULTIPLE BATTERY BANKS

Caution Statements and Important Notes

Warnings about controller damage and diode requirements for combined multi-bank systems.

CHARGING TWO BANKS USING A SELECTOR SWITCH

Caution Statements

Warnings about controller damage when using selector switches and battery connections.

CHARGING TWO BANKS USING A STANDARD BATTERY SWITCH

Caution Statements

Warnings about controller damage and operator error when using standard battery switches.

CHARGING FROM OUTBOARD MOTORS

Caution and Notes

Instructions and warnings for charging from outboard motors, including indicator function and diode requirements.

EXPANDING THE NC25 INTO A HIGH AMPERAGE CHARGE CONTROLLER

Note A: Diode Usage

Specific guidance on diode selection and rating for expanded systems.

CHARGE CONTROLLER TROUBLESHOOTING GUIDE

Charge Indicator Not Lighting

Solutions for when the charge indicator light does not illuminate.

Charge Indicator Always On

Solutions for when the charge indicator light remains constantly illuminated.

Divert Indicator Not Illuminating

Troubleshooting steps if the divert indicator light does not turn on.

Controller Not Switching to Float/Divert

Solutions when the controller fails to switch to float or divert modes.

Battery Overcharged

Steps to diagnose and resolve battery overcharging issues.

Controller Buzzing Sound

Explains the cause and solution for a buzzing sound from the controller.

FLEXCHARGE NC25A CHARGE CONTROLLER OPERATING EFFICIENCY GRAPHS

SPECIAL NOTE

DESIGNING YOUR SYSTEM

System Design Considerations

Covers factors like seasonal use, load, batteries, charge controllers, and solar panels.

FLEXCHARGETM USA PRODUCTS WARRANTY

Warranty Conditions and Exclusions

Outlines the terms, conditions, and exclusions of the product warranty.