--- product_id: 116302037 title: "20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode)" brand: "huine" price: "£23.99" currency: GBP in_stock: true reviews_count: 8 category: "Huine" url: https://www.desertcart.co.uk/products/116302037-20a-12v-24v-auto-ip68-waterproof-pwm-solar-charge-controller store_origin: GB region: United Kingdom --- # 20A Rated Current - powerful & efficient charging IP68 Waterproof - ultimate outdoor durability Auto 12V/24V sensing - seamless battery compatibility 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) **Brand:** huine **Price:** £23.99 **Availability:** ✅ In Stock ## Summary > 🔋 Charge smarter, live freer — your solar system’s silent guardian. ## Quick Answers - **What is this?** 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) by huine - **How much does it cost?** £23.99 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/116302037-20a-12v-24v-auto-ip68-waterproof-pwm-solar-charge-controller) ## Best For - huine enthusiasts ## Why This Product - Trusted huine brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Weather Ready:** IP68 waterproof rating means zero worries in rain, dust, or sun—built for the great outdoors. - • **Compact & Space-Savvy:** Slim aluminum alloy design with heat sink and mounting holes fits perfectly on any solar panel frame. - • **Real-Time Status LEDs:** Three LED indicators keep you instantly informed on solar input, battery health, and load status. - • **Smart Power Management:** Intelligent 4-stage PWM charging extends battery life and prevents overcharge or discharge. - • **Plug & Play Versatility:** Auto-detects 12V or 24V batteries for hassle-free setup in caravans, boats, or solar fencing. ## Overview The HUINE 20A IP68 Waterproof PWM Solar Charge Controller is a compact, intelligent regulator designed for 12V/24V solar battery systems. Featuring robust waterproof protection, automatic voltage sensing, and a 4-stage charging process, it ensures efficient, safe, and reliable power management for outdoor solar setups like caravans, boats, and solar fencing. Its real-time LED indicators and durable aluminum housing make it a trusted choice for professionals seeking hassle-free, long-lasting solar battery maintenance. ## Description Safety Instructions: A) Make sure your battery has enough voltage for the waterproof solar charge controller to recognize the battery type before first installation only sufficient battery voltage can charge or activate the controller. That means it won't charge or activate when hooked to a dead or no-voltage battery. B) The battery cable should be as short as possible to minimize loss. C) The regulator is only suitable for lead acid batteries: OPEN,AGM, GEL It is not suited for nickel metal hydride, lithium ions or other batteries. D) The charge regulator is only suitable for regulating solar panels. Never connect another charging source to the charge regulator. How to connect solar system with the controller: Step 1:Connect the battery to the solar charge controller firstly- plus and minus.(it will auto adapts to the battery voltage) Step 2: Connect the load to the controller secondly. Step 3: Connect the solar panel to the controller finally - plus and minus. ♥ Note: The reverse order applies when deinstalling. Specification: ◆ Color: Black ◆ Rated Charging Current: 20A ◆ Rated Discharging Current: 20A ◆ Max Solar Input Voltage: ＜50V◆ System Voltage: 12V/24V Auto Adapt ◆ Self consume: ＜10mA◆ Operating Temperature: -20 ~+60℃◆ Equalize Charging Voltage: 14.4V/28.8V ◆ Bulk Constant Charging Voltage: 14.2V/28.4V◆ Float Charging: 13.8V/27.6V◆ Discharge Stop Voltage: 11.2V/22.4V◆ Discharge Reconnect Voltage: 12.6V/25.2V◆ Housing: Aluminum alloy ◆ Maximum Wire Size: 16AWG◆ Size/Weight: 82x45x21mm/120g Package Include：● 1 X 20A Waterproof Solar Charge Controller● 1 X User Manual Review: Has worked without issues. - Can't tell you about its water resistance capabilities because I'm using it inside a small enclosure I built for my two generators; one is a regular 10,000 watts generator and the other is 4,500 watts inverter generator. Both are electric start capable, so they both require battery power. The issue with the batteries is that they can lose power quickly or get damage by just sitting around, or if they are not allowed to return to a full charge state after being used. I'm using this HUINE 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller to keep both of the generator's batteries fully charged and ready just in case an emergency. The charge controller is connected to a 160W 12V solar panel and, so far, it has kept both batteries fully charged, without any evident of an overcharged condition. The LED lights provide indication of the battery power, solar panel power and/or an attached load. One thing that users must be aware of is that this charge controller does not have a provision to shut the power off to the load side. So, if you're not planning to attach a load to the controller, you should either tape the wires or use wire caps before connecting batteries. Anyway, based on my results and low price of this charge controller, I recommend it. It has worked flawlessly up to this point. Review: Works very well - Used to control solar panels at our off grid cabin. Works great. ## Features - IP68 Rated Waterproof, this Intelligent 4-stage PWM solar charging controller is suitable for outdoor use,you can use it for solar fencing system, solar monitoring system, solar lighting system or other solar system. - It has short circuit protection, over charge protection, over discharge protection, reverse protection. Can extends battery life time. - Can automatically senses 12V or 24 Volt for your batteries, working mode of the solar charge regulator is 24 hours. - With short cables for connecting with solar panel, battery and load, and three LED lights can help you to know solar charging status, battery level, and load status. - Easy to mount directly on the frame of the solar panel, with heat sink design at bottom and 2pcs mounting holes. its small size also can saves you some space. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07CK2PCC7 | | Best Sellers Rank | #61,646 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #43 in Renewable Energy Controllers | | Brand | HUINE | | Brand Name | HUINE | | Color | Black | | Customer Reviews | 4.5 out of 5 stars 515 Reviews | | Display Type | LCD or LED | | Item Dimensions L x W x H | 3.23"L x 1.77"W x 0.83"H | | Item Weight | 0.12 Kilograms | | Manufacturer | HUINE | | Material | Plastic | | Material Type | Plastic | | Model | PD-16540 | | Part Number | PD-16540 | | Product Dimensions | 3.23"L x 1.77"W x 0.83"H | | Smart Home Compatibility | Not Smart Home Compatible | | UPC | 661748132509 | | Unit Count | 1.0 Count | | Voltage | 24 Volts | ## Product Details - **Brand:** HUINE - **Color:** Black - **Material:** Plastic - **Product Dimensions:** 3.23"L x 1.77"W x 0.83"H - **Voltage:** 24 Volts ## Images ![20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - Image 1](https://m.media-amazon.com/images/I/71r9ICRedIL.jpg) ![20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - Image 2](https://m.media-amazon.com/images/I/71Uq64jSK4L.jpg) ![20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - Image 3](https://m.media-amazon.com/images/I/81q-NtGWLCL.jpg) ![20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - Image 4](https://m.media-amazon.com/images/I/71jrVIkAfbL.jpg) ![20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - Image 5](https://m.media-amazon.com/images/I/71ZJ5vbgiHL.jpg) ## Questions & Answers **Q: During the day time my hune controller green led is on solid, the white led is blinking red/orange, the red led is off. what is this mean?** A: These led lights show your battery is under charging, but your battery is very low(white led is in red flashing) or medium(white led in orange or orange/green flashing), due to low voltage protection(when battery voltage is low than 11.2V), then the red led(third led light) is turn off, and the controller stops discharging for your load. **Q: Do you mean by load that the public gril electricity ? This means when there is grill electricity, it will be used for charging?** A: I'm not sure what you mean by "load." According to the instructions, the load refers to whatever it is (camper, RV, boat, battery) you are trying to support with the power generated by a solar panel, which is then managed through the charge controller and sent to the battery. It sounds as though you are referring to power that comes from the public grid, which has no relationship to the power you get from your solar panel that is regulated through the Huine solar charge controller. IF your battery is completely dead, it cannot signal the charge controller what your amperage is---12 or 24, so the controller can do its job. Then you must connect your system to some other power source (grid, perhaps) to get some charge in the battery so the controller can operate properly. Once that occurs, then your solar panel, routed through the controller to the battery, will charge the battery, and/or power the "load," or whatever you ask it to do. Hope this helps. **Q: What does 24 hour working mode mean? Like anywhere on earth or won't operate over 24 hours straight? Please explain. Thanks** A: Hi friend, 24 hour working mode means the discharging working mode for load is continuous based on your battery is sufficient and your load is connected with solar charge controller, this mode is suitable for load which you would like it to work continuously, the other model "light control mode" is mainly for solar lights which only works at night. **Q: Does the output / load always stay on? Can it power low current devices like sensors (90-150mA)?** A: I have it hooked up to a solar panel so it’s constant output for 12 V. It will keep all low-voltage sensors working I. E. Like radio stations saved and clocks running ## Customer Reviews ### ⭐⭐⭐⭐⭐ Has worked without issues. *by F***X on September 12, 2023* Can't tell you about its water resistance capabilities because I'm using it inside a small enclosure I built for my two generators; one is a regular 10,000 watts generator and the other is 4,500 watts inverter generator. Both are electric start capable, so they both require battery power. The issue with the batteries is that they can lose power quickly or get damage by just sitting around, or if they are not allowed to return to a full charge state after being used. I'm using this HUINE 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller to keep both of the generator's batteries fully charged and ready just in case an emergency. The charge controller is connected to a 160W 12V solar panel and, so far, it has kept both batteries fully charged, without any evident of an overcharged condition. The LED lights provide indication of the battery power, solar panel power and/or an attached load. One thing that users must be aware of is that this charge controller does not have a provision to shut the power off to the load side. So, if you're not planning to attach a load to the controller, you should either tape the wires or use wire caps before connecting batteries. Anyway, based on my results and low price of this charge controller, I recommend it. It has worked flawlessly up to this point. ### ⭐⭐⭐⭐⭐ Works very well *by K***S on March 29, 2026* Used to control solar panels at our off grid cabin. Works great. ### ⭐⭐⭐⭐⭐ PWM Waterproof charge controllers *by R***T on January 6, 2020* I have 2-10 amp and 3-20 amp of these charge controllers these are the best charge controllers I have purchased in the last 10 years they are small compact and one hundred percent waterproof I love the way the electronics are sealed in a silicone based substance similar to what they sealed Auto parts electronics in the 1980s.They work exactly like what is advertised I have even checked this on my multimeter they work great and should last for many many years. I also like the fact that these charge controllers are waterproof can tolerate high temperatures and also low temperatures. Super easy to install these charge controllers no programming needed. ## Frequently Bought Together - HUINE 20A 12V 24V Auto IP68 Waterproof PWM Solar Charge Controller Solar Panel Battery Intelligent Regulator for Solar System Caravan Boat(24 Hours Working Mode) - ECO-WORTHY Solar Panel 25W 18V Monocrystalline Waterproof Panel for Charging 12V Battery of RV Boat Trailer ATV Car or Powering 12V Light, Charing 12V Battery Pack and Other Off-Grid Applications - [Upgraded] 30A Solar Charge Controller, 12V/ 24V Solar Panel Regulator with Adjustable LCD Display Dual USB Port Timer Setting PWM Auto Parameter --- ## 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://www.desertcart.co.uk/products/116302037-20a-12v-24v-auto-ip68-waterproof-pwm-solar-charge-controller](https://www.desertcart.co.uk/products/116302037-20a-12v-24v-auto-ip68-waterproof-pwm-solar-charge-controller) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-04*