--- product_id: 14280791 title: "12V Charge Controller" brand: "flexcharge tm" price: "WS$1667" currency: WST in_stock: true reviews_count: 3 url: https://samoa.desertcart.com/products/14280791-12v-charge-controller store_origin: WS region: Samoa --- # Max Input Voltage: 140V DC 25A DC Current Weatherproof Metal Case 12V Charge Controller **Brand:** flexcharge tm **Price:** WS$1667 **Availability:** ✅ In Stock ## Summary > ⚡ Charge Ahead: The Future of Energy Management! ## Quick Answers - **What is this?** 12V Charge Controller by flexcharge tm - **How much does it cost?** WS$1667 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [samoa.desertcart.com](https://samoa.desertcart.com/products/14280791-12v-charge-controller) ## Best For - flexcharge tm enthusiasts ## Why This Product - Trusted flexcharge tm brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Durable Design:** Built to withstand the elements with an industrial-grade metal case. - • **Unmatched Efficiency:** Experience the pinnacle of charge controller performance. - • **Customizable Charging:** Tailor your charge voltage for peak output efficiency. - • **Powerful Input Handling:** Maximize your solar potential with 140V DC input. - • **Robust Current Management:** Seamlessly manage up to 25 Amps for optimal battery charging. ## Overview The NC25A Charge Controller sets a new standard in efficiency and durability, boasting a maximum input voltage of 140V DC and the ability to handle 25 Amps of DC current. Its adjustable charge threshold allows for optimized performance, all housed in a rugged, weather-resistant metal case. ## Description Model NC25A Protect your batteries from being over charged with this charge controller. Without it you could dramatically shorten the life of your battery / powerpack. Your battery / power pack has a limit on how high of a voltage it can see while charging. One term to describe this voltage is called the "Peak Charge Voltage". If you pedal too fast and generate too high of a voltage, then you could exceed the peak charge voltage and supply your battery with too much current. This would damage the cells inside and affect their ability to take a charge. In most cases the peak charge voltage for a lead acid / AGM (absorbed glass mat) battery / powerpack is somewhere near 14.8V DC (V= Volts DC= Direct Current). This NC25A charge controller has a diversion load output (diversion load slows down or provides a "braking" function to a wind turbine or over enthusiastic cyclist). I like hooking the diversion load up to one or two of these 1000-Watt work light stands. When the charge controller switches into diversion load mode, the current from the pedal power or wind turbine generator will be routed into the two 1000 W shop lights. You may be wondering "How many Watts will actually get dissipated into those two 1000W shop lights?". We can approximate that by assuming 15 Volts is what is coming off the diversion pin which would cause the lights to glow dimly and dissipate about 200 Watts of power. Many charge controllers can handle 25 Amps or more, but there aren't many that can handle a very high input voltage. This is because most charge controllers use FET transistors to do pulse width modulation. The lower cost FETs can only usually handle 35 to 45V max input voltage. The NC25A charge controller uses a mechanical relay to switch the voltage on and off to the lead acid battery and has a max input voltage of 140 Volts. After searching the internet I have found that there is no other controller selling for this price that can handle that kind of high input voltage. ## Features - The NC25A Beats all other charge controllers for efficiency - Has the highest rated Max Input Voltage of all controllers in its class 140 V DC - Handles up to 25 Amps of DC Current into a 12 Volt Lead Acid Battery (Approx. 300 Watts) - Adjustable charge threshold lets you optimize charge voltage for your output - Industrial metal case - hardened for outside weather ## Images ![12V Charge Controller - Image 1](https://m.media-amazon.com/images/I/71JvlO0puCL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ I can easily adjust the voltage going to the batteries to insure ... *by B***D on Reviewed in the United States 🇺🇸 on September 6, 2016* This is a technical piece of electronics. You must read the directions. If you know the truth about charging your batteries with a solar panel then this is the only controller to get. I can easily adjust the voltage going to the batteries to insure it will not cook the batteries and still get them fully charged. The auto equalization mode is fun to watch on my trimetric monitor.PS You must install Diodes and fuse the power lines. ### ⭐⭐⭐⭐⭐ Five Stars *by I***E on Reviewed in the United States 🇺🇸 on April 3, 2015* I like it. Thanks. ### ⭐⭐⭐⭐ Key Points *by N***2 on Reviewed in the United States 🇺🇸 on January 12, 2013* I wanted to learn about solar/wind energy and this appeared to be the most flexible controller I could find for the price.This charge controller is fairly unique for the price. It allows a large range for voltage input VDC 0-150 (or 140v - I don't remember) to charge a 12v battery. There are also 24v, 36v, 48v versions. It can be used with Wind, solar, other DC alternators. It is a hackable / expandable controller.This unit does not include a blocking diode (this prevents the power from the battery flowing back to your input source).I ended up buying mine form an Ebay "buy it now" vendor as it was noticeably cheaper.I put a link to the manual in the comments. If you are not willing to read the manual multiple times, I would not recommend you buy this charge controller. An exception may be if you have some assist in you setting it up. Make sure you have a volt meter to monitor your battery voltage. I know when I did my 1st real test it appears it is over charging my battery. Now I need to go back and figure out why. (Good learning experience)Parts in the manual are an interesting read even if you don't end up buying the controller.I will update my review at some point. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://samoa.desertcart.com/products/14280791-12v-charge-controller](https://samoa.desertcart.com/products/14280791-12v-charge-controller) --- *Product available on Desertcart Samoa* *Store origin: WS* *Last updated: 2026-04-28*