The patented circuit architecture developed during the design of the NC25A charge controller was used as the basis for the development of the NCHC family of controllers. Pretty it may not be, but the NCHC will regulate PV, Wind, or any other current limited charging source with the highest efficiency possible in an alternative energy system charge controller.
The NCHC line of controllers are series type regulators for use on flooded lead acid, gel, or flooded NiCad battery technologies. The regulation voltage is adjustable through a wide range. Available as an option with this controller is CHARGE DIVERT which allows you to use the excess unregulated energy from your charging source for other electrical jobs. The NCHC regulates charging inputs from PV, Permanent Magnet Wind and Towed Water Generators, or any other current limited DC charging source. Standard default unit is for 12V systems. 24V, 36V or 48V systems are special order. See voltage selection option at the bottom. (1000A max charging current in this configuration, contact us if using more than 4 contactors on a single controller). Multiple battery banks can be charged with the use of standard battery charging isolators.
How does the NCHC achieve this level of efficiency, and why is it so important? Flexcharge designed the NCHC controllers with an amazingly low insertion loss resistance of only 0.001 ohms. ( Insertion Loss Resistance is the total resistance of the controllers regulating circuit from input to output on both the positive and negative wires). Here's a little math to demonstrate the point:
The power wasted as heat in a charge controller is calculated by the following simple formula: (Power Wasted as Heat) = (Resistance) x (Charging Current) x (Charging Current) or P= R x I2.
So how much power does the NCHC 60 ampere controller, for example, waste at 60A of charging current? P = 0.001 x 60 x 60 = Only 3.6 watts.
By Comparison how much power does a typical brand 60A controller with 0.010 ohms of insertion loss resistance waste while charging at 60 amperes. P= 0.01 x 60 x 60 = 36 watts of heat (WOW!) Precisely why you will see large heat sinks on these controllers, to dissipate all that wasted energy. You would also need and additional 36W solar panel ($$$) to put the same amount of energy into the battery bank, than is required with the NCHC-60 controller.
The NCHC controllers can be expanded with amazing simplicity to grow with your charging system. Just add an additional high efficiency contactors and extend three wires from the previous contactor. (Note: Contactors must be the same voltage and amperage configuration as the controller.) It is possible to add as many as 4ea 100A contactors to the standard NCHC, with no special modifications, or as many as 20ea with a simple addition of an interface contactor. That's as much as 2000A of charging current capacity at up to 48V (96KWs of Charging Energy) while still using only 0.005 amperes to operate the charging circuitry.
By using separate contactors for different types of charging sources the charging sources are automatically isolated from each other when the controller is regulating. For example: Connect the PV System to one contactor, connect a wind generator to the other contactor which is paired with a divert contactor. When the controller goes to Divert mode the PV system is isolated from the Wind system and the divert load is applied to the wind generator only.
By adding a different type of contactor you can add Charge Divert to the NCHC. This feature connects the charging source directly, with no regulation, to the Divert Load. Divert is only active only while voltage and current are at usable levels from the charging source.
Some uses for Charge Divert:
- Pumping applications
- Ventilation Blowers
- Loads on wind and water permanent magnet generators.
- 5 Year manufacturers warranty.
- Auto assembled in the USA to ISO9000 specifications.
- Better than 99.50% charging efficiency from 1A of charging current.
- Operates efficiently (98%) on system sizes as low as 0.25A of charging input.
- Charges batteries from 0 volts with full uninterrupted power.
- High amperage charge capacity, 24V, 36V, and 48V models with up to 200A capacities).
- Up to 200 amp charge divert, optional.
- Stable divert circuitry prevents dropouts if charge source voltage falls too low.
- Diverts only when voltage and current are at usable levels. Perfect for motor type loads (fans, pumps, etc...)
- Peak charge voltage adjustment.
- Accurately charges through battery isolators, and works perfectly with combiners. Can be used as a battery combiner. Call for instructions.
- Consumes only 4mA (0.004A) while charging and at night, 2mA if you do not use the charge indicator.
- Charges batteries at full power, below the plate saturation point, to charge batteries faster, and reduce electrolyte depletion by up to 90% over conventional constant voltage, PWM & high frequency charge regulators.
- Batteries start charging at 0.005A of charge current and can handle intermittent surges up to 300A.
- Automatically micro equalizes batteries at each full charge.
- Controller can withstand open circuit input voltage spikes of 500V and 100 VOLTS continuous without damage.
- Reverse polarity, and transient voltage protection on the battery sense wires.
- No power wasting sample periods.
- Remote battery voltage sensing so the controller can be mounted anywhere between the charging source and the batteries.
- Easy to install using the labeled corrosion resistant Nickel/Brass/Stainless Steel connector, and contactor terminals.
- U/L 94V-O rated enclosure.
- Completely sealed electronics for Marine or Outdoor mounting. Can be used in 100% humidity and salt air environments.
- No EMI or RFI noise to interfere with sensitive radio or navigation equipment.
Controller comes with one Charge contactor. Additional charge contactors can also be purchased separately on our web store. Charge contactors must also be ordered in the same voltage and amperage configuration as your NCHC controller.
Divert contactors are optional and available separately on our web store. They must be ordered in the same voltage and amperage configuration as your NCHC controller. Can be added on at any time.
See NCHC-100-xx for a higher amperage controller. NCHC-35-xx for smaller amperage controller in this line.
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