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MANUAL
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
12V Controller Shown Below
Patented
Rev 04, Ver1
AUG 2018
SES Flexcharge USA, 1217 State St., Charlevoix, MI 49720
Ph: 231-547-9430, Web Site: www.flexcharge.com
Page 1 of 24
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Summary of Contents for Flexcharge NC25A-12
- Page 1 For GEL, AGM, and Flooded Cell Lead Acid Batteries Not for Lithium Batteries 12V Controller Shown Below Patented Rev 04, Ver1 AUG 2018 SES Flexcharge USA, 1217 State St., Charlevoix, MI 49720 Ph: 231-547-9430, Web Site: www.flexcharge.com Page 1 of 24...
- Page 2 Features Controls and Indicators Installation Instructions Indicator Functional Description Flexcharge Energy State Charge Method (ESCM) Operating Characteristics - Wire Selection Chart - Diode Selection Chart Using or Not Using Blocking Diodes Solar Panels Charging One Battery Bank Solar Panels Charging Two Battery Banks...
- Page 3 Features 5 YEAR WARRANTY. COMPLETELY SEALED ELECTRONICS FOR MARINE OR OUTDOOR MOUNTING. LOW BATTERY VOLTAGE INDICATOR. (FLASHING RED LIGHT). Works with GEL, AGM, and Flooded Cell Lead Acid Batteries. Also for flooded Ni-Cad Batteries ARC REDUCTION CIRCUITRY TO ELIMINATE OR REDUCE RELAY CONTACT WEAR. CHARGING EFFICIENCY BETTER THAN 99.50% FROM 0.5A TO 30A OF CHARGING CURRENT.
- Page 4 Peak Charge Voltage Adjustment Multi Function Indicator System Voltage Factory Calibrated for use with Lead See the table on page 7 for acid Battery 12= 12V, 24=24V, description of operation Technologies. Look for the small 36=36V, etc calibration dent in the case Call Direct to the Do not move this adjustment unless Manufacturer.
- Page 5 INSTALLATION INSTRUCTIONS Flexcharge TM USA NC25A ULTRA HIGH EFFICIENCY CHARGE CONTROLLER Congratulations, you will soon be using the most efficient controller available. Using this controller has the direct equivalency of increasing your solar panel capacity by up to 20% over any other controller Flexcharge USA has examined.
- Page 6 This concludes the installation section. If the controller does not function as you think it should, first check the troubleshooting guide in this manual, then call your dealer, or Flexcharge USA at (231) 547-9430. Web Site www.flexcharge.com For an explanation of the multi function indicator operation, see the Indicator Function Table on page 7.
- Page 7 THAN 10 SECONDS, COVER SOME OF THE SOLAR PANEL(S) WITH A BLANKET OR CARDBOARD TO SLOW THE CHARGE RATE. All Flexcharge controllers are 100% tested and calibrated at the factory. a) Connect an accurate digital voltmeter on the terminals of the battery you are charging.
- Page 8 PWM and other constant voltage charge methods. The battery takes exactly what it needs rather than being forced to take a set voltage. With the Flexcharge method you can charge your battery bank indefinitely without any possibility of overcharging. The batteries will last longer, require less watering maintenance, and hold a better charge.
- Page 9 Schottky International Rectifier 400V 1N4004 Silicon Diodes Incorporated 400V 1N5404 Silicon Diodes Incorporated 1000V 6A10 Silicon Diodes Incorporated If you cannot find these parts locally, call Flexcharge USA. Many of the above diodes are in stock. Page 9 of 24...
- Page 10 There has been a great deal of discussion in the solar electric industry over the use of blocking diodes. In an effort to clarify the topic Flexcharge TM USA has called, met with, or gathered information pertaining to the use of diodes from several solar panel and equipment manufacturers to verify the following information.
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- Page 21 CHARGE CONTROLLER TROUBLESHOOTING GUIDE IF YOU ARE USING CRIMP CONNECTORS, THEY MUST BE SOLDERED. CRIMP ONLY CONNECTIONS WILL ONLY MAKE GOOD CONNECTION FOR A SHORT PERIOD OF TIME, EVEN LESS IN A MARINE OR OUTDOOR ENVIRONMENT. PROBLEM SOLUTIONS Charge Indicator does not Using the Charge Indicator is optional light.
- Page 22 1.40 93.00 1.20 1.00 92.00 0.80 0.60 91.00 0.40 0.20 90.00 0.00 Charge Current (Amperes) Efficiency Comparison: Flexcharge NC25A -to- Typical Alternative Energy Charge Controller 100.00 99.00 NC25A Charge 98.00 97.00 96.00 95.00 94.00 Typical 93.00 92.00 91.00 90.00 Charging Efficiency 89.00...
- Page 23 Flexcharge Flexcharge USA products PV model controllers are warranted for a period of two years. Five years on NC series charge controllers, and one year on lighting products, from the date of purchase, subject to the conditions set forth below. This warranty to the original purchaser, warrants the products to be free from material and workmanship defects.
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