{"product_id":"hobbywing-seaking-30a-v4-brushless-rc-boat-esc","title":"Hobbywing SEAKING 30A V4 2-3S Waterproof Brushless Marine ESC","description":"\u003cstyle\u003e\n.cnhl-esc-content {\n  line-height: 1.7;\n  color: #222;\n}\n\n.cnhl-esc-content h2 {\n  font-size:18px;\n  font-weight:700;\n  margin:24px 0 10px;\n  color:#000;\n  border-bottom:1px solid #eee;\n  padding-bottom:6px;\n}\n\n.cnhl-esc-content h3 {\n  font-size:15px;\n  font-weight:bold;\n  margin:14px 0 8px;\n  color:#000;\n}\n\n.cnhl-esc-table-wrap {\n  width:100%;\n  overflow-x:auto;\n  -webkit-overflow-scrolling:touch;\n  margin:14px 0 20px;\n}\n\n.cnhl-esc-table {\n  width:100%;\n  min-width:620px;\n  border-collapse:collapse;\n  font-size:14px;\n  line-height:1.5;\n}\n\n.cnhl-esc-table th,\n.cnhl-esc-table td {\n  padding:10px 12px;\n  border:1px solid #ddd;\n  text-align:left;\n  vertical-align:top;\n}\n\n.cnhl-esc-table th {\n  width:34%;\n  background:#E60073;\n  color:#fff;\n  font-weight:700;\n}\n\n.cnhl-esc-table td {\n  background:#f2f2f2;\n}\n\n.cnhl-fit-box {\n  background:#f7f7f7;\n  padding:14px 16px;\n  margin:16px 0;\n  border-left:4px solid #E60073;\n  font-size:14px;\n  line-height:1.65;\n}\n\n.cnhl-img {\n  margin:20px 0;\n  text-align:left;\n}\n\n.cnhl-img img {\n  width:auto;\n  height:auto;\n  max-width:100%;\n  display:block;\n}\n\n.cnhl-esc-link {\n  color:#E60073;\n  text-decoration:underline;\n}\n\u003c\/style\u003e\n\u003cdiv style=\"font-family:Arial,Helvetica,sans-serif;color:#333;font-size:15px;line-height:1.75;\"\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe \u003cstrong\u003eHobbywing SEAKING 30A V4 Brushless Marine ESC\u003c\/strong\u003e is a compact, water-cooled electronic speed controller designed for small RC boats running 2S or 3S LiPo batteries. With a 30A continuous current rating, 100A peak output and an IP67 waterproof design, it brings modern SeaKing V4 motor control to lightweight marine power systems.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 16px;\"\u003eBuilt for brushless sensorless motors, this \u003cstrong\u003e30A RC boat ESC\u003c\/strong\u003e combines a slim 32.8 × 26 × 18.3mm housing with an adjustable 6V\/7.4V switch-mode BEC, Freewheeling technology and programmable throttle settings. Support for Hobbywing programming devices, OTA data monitoring and firmware updates gives boat builders additional control over setup and performance.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#fff7fb;border-left:4px solid #E60073;padding:14px 16px;margin:18px 0;\"\u003e\n\u003cstrong style=\"color:#111;\"\u003eQuick Fit Check\u003c\/strong\u003e\n\u003cul style=\"margin:8px 0 0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Brushless RC boats up to 45cm in length.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e 2S–3S LiPo (7.4V–11.1V nominal).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e Sensorless brushless motor, single-motor setup.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent:\u003c\/strong\u003e 30A continuous \/ 100A peak.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling:\u003c\/strong\u003e Water-cooled marine ESC; requires a suitable water-cooling circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery connector:\u003c\/strong\u003e Not preinstalled; soldering is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:13px;line-height:1.65;margin:9px 0 0;color:#666;\"\u003eCheck motor current demand, propeller load, cooling layout, installation space and receiver power requirements before installation. Boat length is a manufacturer application guideline, not a guarantee of compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eHobbywing SEAKING 30A V4 Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:separate;border-spacing:0 8px!important;font-size:14px;line-height:1.5;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:39%;background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBrand \/ Series\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eHobbywing SEAKING V4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eModel\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSEAKING 30A V4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eProduct Number \/ SKU\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e30302061\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eESC Type\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eBrushless, Sensorless, Marine ESC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eContinuous \/ Peak Current\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e30A \/ 100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eInput Voltage\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e2–3S LiPo (7.4–11.1V nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBuilt-in BEC\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSwitch-mode, adjustable 6V \/ 7.4V; 2A per current online product specification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eCooling System\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eWater-cooled\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eCooling Pipe Diameter\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e2.0mm inner \/ 4.0mm outer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e32.8 × 26 × 18.3mm (excluding cooling pipe)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e33.9g (including wires and motor connectors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Input Wires\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e14AWG red \/ black, 75mm each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Output Wires\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e3 × 16AWG black wires, 60mm each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Input Connector\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eNone (connector installation required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Output Connectors\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e3.5mm gold female bullet connectors\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eESC Programming\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eLED Program Box, LCD G2 \/ Pro, OTA Programmer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eFirmware Upgrade\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eSupported with compatible programming hardware\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eRecommended Boat Length\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e≤45cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eKey Features of the SEAKING 30A V4\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:20px 0 8px;\"\u003eIP67 Waterproof Protection with Water Cooling\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eMarine electronics must cope with splashes, moisture and heat in confined hulls. The SEAKING 30A V4 features an IP67-rated design and integrated water-cooling passages to support operation in compatible RC boat installations.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eIts cooling pipe connections use a 2.0mm inner and 4.0mm outer diameter. A properly connected water-cooling circuit helps carry heat away from the ESC during operation, particularly when the motor is working under propeller load.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eAlthough the ESC is waterproof, electrical plugs and exposed connections should be checked and dried after use to reduce corrosion risk. Secure cooling hoses to prevent leaks or disconnection.\u003c\/p\u003e\n\n\u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/003_eaa55e14-a613-4611-bdd6-270d77847e2c.png?v=1794378025\" alt=\"Hobbywing SeaKing 30A V4 IP67 waterproof brushless marine ESC with water cooling\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eCompact 32.8mm Housing for Small RC Boats\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eWith a 32.8 × 26 × 18.3mm body and a weight of approximately 33.9g including wires and output connectors, the SEAKING 30A V4 is designed for compact installations where hull space and component weight matter.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eThe slim V4 construction makes it easier to organize the ESC, brushless motor, cooling tubing, receiver and battery inside a small RC boat. Hobbywing recommends this model for boats up to 45cm in length, subject to the electrical demands of the power system.\u003c\/p\u003e\n\n\u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/006_22c54377-7107-4f1e-9cb1-e6016e964b41.png?v=1794378194\" alt=\"Hobbywing SeaKing V4 compact ESC design compared with previous SeaKing V3 models\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eAdjustable 6V \/ 7.4V Switch-Mode BEC\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eThe integrated switch-mode BEC supplies regulated power to the receiver and compatible steering servo, helping simplify the electrical layout without requiring a separate receiver battery in suitable installations.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eChoose 6V for standard-voltage electronics or 7.4V when the connected receiver and servo are rated for higher-voltage operation. Always verify the voltage and current requirements of the radio system before changing the BEC setting.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eFreewheeling Technology for Improved Throttle Behavior\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eHobbywing's Freewheeling technology helps improve motor-control efficiency and throttle response. It can also contribute to reduced ESC heat generation and more controlled deceleration when the throttle is released.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eOn the SEAKING 30A V4, Freewheeling is enabled and cannot be disabled through the programming menu. This provides consistent behavior without requiring users to select the function during setup.\u003c\/p\u003e\n\n\u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/009_0b921594-b7de-4cf1-9ecb-5251394c36bf.png?v=1794378389\" alt=\"Hobbywing SeaKing V4 Freewheeling technology for RC boat deceleration and throttle control\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eAUX Channel Adjustment from Your Radio\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eThe additional yellow signal wire allows the ESC to use an available receiver channel for real-time adjustment of selected parameters. Depending on the chosen AUX function, you can adjust maximum reverse force, punch or drag brake through a suitable transmitter switch or control.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eThis is particularly useful for boat builders who want to fine-tune handling without repeatedly connecting programming hardware. The receiver must have an available channel, and the transmitter must be configured appropriately.\u003c\/p\u003e\n\n\u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/010_a6c62222-06d0-41d1-8b3a-fefacb527780.png?v=1794378494\" alt=\"Hobbywing SeaKing 30A V4 AUX yellow signal wire for remote ESC parameter adjustment\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eHW LINK Data Monitoring and Firmware Support\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 30A V4 supports performance monitoring through the Hobbywing HW LINK system when connected to a compatible external OTA Bluetooth module.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eAvailable monitoring functions include recorded peak values and, with the appropriate OTA connection during operation, real-time information such as throttle position, voltage, temperature and motor speed. Historical operating graphs can also be reviewed through the OTA-supported data function.\u003c\/p\u003e\n\u003cp style=\"margin:0 0 14px;\"\u003eFirmware upgrades and parameter adjustments are supported through compatible Hobbywing programming equipment. The OTA module or suitable LCD programming hardware is required for the corresponding functions and is sold separately.\u003c\/p\u003e\n\n\u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/011_b3ec2e9b-1425-476a-8259-da2c52c1286a.png?v=1794378554\" alt=\"Hobbywing SeaKing V4 ESC performance monitoring using HW LINK app and external OTA Bluetooth module\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eBattery, Motor and Connector Compatibility\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 30A V4 supports \u003cstrong\u003e2S and 3S LiPo batteries\u003c\/strong\u003e. Selecting the right battery is only part of the setup: motor current, propeller size, hull load and cooling conditions determine whether a 30A ESC has sufficient operating headroom.\u003c\/p\u003e\n\n\u003ctable style=\"width:100%;border-collapse:separate;border-spacing:0 8px!important;font-size:14px;line-height:1.5;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:39%;background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e2S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e7.4V nominal; supported for suitable brushless marine power systems.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e3S LiPo\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003e11.1V nominal; supported when the motor and overall setup are rated for 3S operation.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003e4S LiPo or Higher\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eNot supported by this ESC.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eMotor Type\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eThree-phase sensorless brushless motor.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#E60073;color:#fff;padding:10px 12px;font-weight:bold;\"\u003eBattery Connector\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 12px;\"\u003eChoose and solder a suitable connector matching the battery and expected current.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cdiv style=\"background:#fff7fb;border-left:4px solid #E60073;padding:13px 16px;margin:16px 0;\"\u003e\n\u003cstrong style=\"color:#111;\"\u003eImportant Connector Note:\u003c\/strong\u003e\n\u003cp style=\"margin:6px 0 0;\"\u003eThe SEAKING 30A V4 does not include a preinstalled battery input connector. The red and black battery leads must be fitted with a suitable connector before use. The motor side has three 3.5mm gold female bullet connectors. Check the mating motor connectors before installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eESC Programming and Setup\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 12px;\"\u003eThe SEAKING 30A V4 offers adjustable motor-control settings so you can configure the ESC for your boat's operating requirements.\u003c\/p\u003e\n\n\u003cul style=\"margin:0 0 14px;padding-left:22px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eRunning Mode:\u003c\/strong\u003e Forward Only or Forward and Reverse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Reverse Force:\u003c\/strong\u003e Adjust reversing strength.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLiPo Cell Count:\u003c\/strong\u003e Automatic detection or manual 2S \/ 3S selection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Voltage Cutoff:\u003c\/strong\u003e Set a suitable battery protection threshold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBEC Voltage:\u003c\/strong\u003e Select 6V or 7.4V.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor Rotation:\u003c\/strong\u003e Change motor direction electronically.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePunch:\u003c\/strong\u003e Adjust acceleration response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrag Brake:\u003c\/strong\u003e Tune deceleration at neutral throttle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiming:\u003c\/strong\u003e Adjust motor timing according to the power system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAUX Channel Function:\u003c\/strong\u003e Assign supported real-time parameter adjustments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eFreewheeling is also part of the V4 parameter system, but it remains enabled on the 30A version. Available settings and menu options may vary by model and firmware.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe ESC supports the Hobbywing LED Program Box, LCD G2 \/ Pro programming boxes and OTA Programmer. For a straightforward bench-setup accessory, see the \u003ca href=\"https:\/\/chinahobbyline.com\/products\/hobbywing-esc-led-program-card\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing ESC LED Program Card\u003c\/a\u003e.\u003c\/p\u003e\n\n\n\n\u003ch3 style=\"font-size:17px;font-weight:bold;color:#111;margin:22px 0 8px;\"\u003eBefore Your First Run\u003c\/h3\u003e\n\n\u003col style=\"margin:0 0 14px;padding-left:22px;\"\u003e\n\u003cli\u003eCheck the motor, battery connector, receiver wiring and water-cooling connections.\u003c\/li\u003e\n\u003cli\u003eConfigure the transmitter and perform throttle-range calibration as described in the official manual.\u003c\/li\u003e\n\u003cli\u003eConfirm that the ESC correctly detects the LiPo cell count.\u003c\/li\u003e\n\u003cli\u003eSet the BEC voltage, low-voltage cutoff and running mode for the connected equipment.\u003c\/li\u003e\n\u003cli\u003eTest motor rotation and throttle response with the propeller safely clear of people and objects.\u003c\/li\u003e\n\u003cli\u003eVerify cooling-water flow before operating under load.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eAlways disconnect the LiPo battery after use. Do not leave the battery connected to the ESC during storage.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eProtection and Operating Reliability\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThe SEAKING 30A V4 includes important electronic safeguards for marine use, including low-voltage protection, ESC temperature protection, over-current protection and throttle-signal-loss protection.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eThese functions help reduce the risk of damage when operating conditions become abnormal. However, they do not replace correct motor selection, adequate current headroom, reliable connectors or effective water cooling.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003cstrong\u003eModel-specific note:\u003c\/strong\u003e The SEAKING 30A V4 does not include the dedicated capacitor overheating protection available on certain higher-current SeaKing V4 models.\u003c\/p\u003e\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eOfficial Hobbywing SEAKING V4 Manual\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eFor throttle calibration, programming options, wiring instructions, protection behavior and troubleshooting, refer to the official Hobbywing user manual covering the SEAKING 30A, 60A, 90A and 120A V4 ESCs.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/Hobbywing_SEAKING_120A-90A-60A-30A_V4__Manual.pdf?v=1794375916\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"color:#E60073;text-decoration:underline;font-weight:bold;\"\u003eDownload Hobbywing SEAKING 30A V4 User Manual (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eExplore More Hobbywing Marine ESCs \u0026amp; Accessories\u003c\/h2\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eLooking for a different power rating or planning another RC boat build? Explore our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-seaking-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing SeaKing ESC collection\u003c\/a\u003e to compare marine speed controllers across the SeaKing series, or browse our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/rc-boat-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eRC Boat ESC collection\u003c\/a\u003e for more electronic speed controllers designed for brushless marine power systems.\u003c\/p\u003e\n\n\u003cp style=\"margin:0 0 14px;\"\u003eFor additional speed controllers and setup tools, visit our \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/hobbywing-escs\" style=\"color:#E60073;text-decoration:underline;\"\u003eHobbywing ESC collection\u003c\/a\u003e and \u003ca href=\"https:\/\/chinahobbyline.com\/collections\/esc-programmers-accessories\" style=\"color:#E60073;text-decoration:underline;\"\u003eESC Programmers \u0026amp; Accessories\u003c\/a\u003e.\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size:20px;font-weight:bold;color:#111;margin:30px 0 12px;border-bottom:1px solid #eee;padding-bottom:8px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eIs the Hobbywing SEAKING 30A V4 waterproof?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. It features an IP67-rated waterproof design for marine use. Check and dry exposed electrical connections after operation, and ensure the water-cooling system is properly connected.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 30A V4 support 3S LiPo batteries?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. It supports both 2S and 3S LiPo batteries. The connected brushless motor and overall power system must also be suitable for the selected voltage and operating current.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eWhat size RC boat is the SEAKING 30A V4 designed for?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eHobbywing recommends boats up to 45cm in length. Actual suitability depends on motor specifications, propeller load, expected current draw, cooling and installation dimensions.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 30A V4 have a built-in BEC?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. It has an adjustable switch-mode BEC with 6V and 7.4V output settings. Select the voltage according to the receiver and servo specifications. Check the current rating against the actual equipment and ESC documentation.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 30A V4 have built-in Bluetooth?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The ESC supports Hobbywing HW LINK app functions through a compatible external OTA Bluetooth module. The module is required for Bluetooth-based configuration and monitoring.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan I update the SEAKING 30A V4 firmware?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. Firmware updating is supported using compatible Hobbywing programming hardware and software. An appropriate LCD programming box or OTA module is required.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan I use a Hobbywing LED Program Card with this ESC?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eYes. The SEAKING 30A V4 supports compatible Hobbywing LED programming equipment. Follow the model-specific wiring and programming instructions in the official user manual.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eDoes the SEAKING 30A V4 include a battery connector?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The battery input wires come without a preinstalled connector. A suitable connector must be soldered to the ESC and matched to the battery plug and current requirements.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:16px;font-weight:bold;color:#111;margin:18px 0 6px;\"\u003eCan this ESC run a brushed motor or two brushless motors?\u003c\/h3\u003e\n\u003cp style=\"margin:0 0 12px;\"\u003eNo. The SEAKING 30A V4 is designed to control one compatible sensorless brushless motor. It is not a brushed motor ESC, and a single ESC should not be used to drive two brushless motors.\u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"ChinaHobbyLine","offers":[{"title":"Global","offer_id":67943723008214,"sku":"30302061 GL","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/01_b6208cc5-d78d-458a-934d-ff55fd9b87ea.webp?v=1794377974","url":"https:\/\/chinahobbyline.com\/products\/hobbywing-seaking-30a-v4-brushless-rc-boat-esc","provider":"ChinaHobbyLine","version":"1.0","type":"link"}