{"product_id":"hobbywing-seaking-300a-hv-v4-brushless-marine-esc","title":"Hobbywing SeaKing 300A HV V4 Brushless Marine 5–14S 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\n\n\u003cdiv style=\"max-width:1000px;margin:0 auto;font-family:Arial,Helvetica,sans-serif;color:#222;font-size:15px;line-height:1.75;\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eHobbywing SeaKing 300A HV V4 Brushless Marine ESC\u003c\/strong\u003e is built for large, high-current RC boat power systems that need precise throttle response, dependable cooling, and high-voltage LiPo support. With a 300A continuous current rating, 1600A peak current rating, and 5–14S LiPo compatibility, it brings serious power-handling capability to demanding marine installations.\u003c\/p\u003e\n\n\u003cp\u003eBeyond its current rating, this SeaKing V4 controller combines an IP67-rated enclosure, built-in Bluetooth programming, a high-capacity capacitor bank, configurable BEC output, and a dedicated programming interface. It offers more flexibility for setting up, monitoring, and maintaining a large brushless RC boat.\u003c\/p\u003e\n\n\u003cdiv style=\"background:#fafafa;border-left:4px solid #e60073;padding:18px 20px;margin:24px 0;border-radius:5px;\"\u003e\n\u003ch2 style=\"font-size:20px;margin:0 0 12px;color:#111;\"\u003eQuick Fit Check\u003c\/h2\u003e\n\u003cul style=\"margin:0;padding-left:20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery:\u003c\/strong\u003e 5–14S LiPo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurrent rating:\u003c\/strong\u003e 300A continuous \/ 1600A peak\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor:\u003c\/strong\u003e Three-phase sensorless brushless marine motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMotor connection:\u003c\/strong\u003e Integrated 8.0mm female sockets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery connection:\u003c\/strong\u003e 8AWG red\/black input wires; no battery plug pre-installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater cooling:\u003c\/strong\u003e 3.5mm inner \/ 6.0mm outer water-cooling port diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eESC body dimensions:\u003c\/strong\u003e 94 × 58.8 × 43mm (L × W × H)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer boat-length guidance:\u003c\/strong\u003e Up to 180cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin:12px 0 0;font-size:14px;\"\u003e\u003cstrong\u003eBefore ordering:\u003c\/strong\u003e Check motor current requirements, available hull space, cooling-tube connections, and connector compatibility. Boat length alone does not determine ESC suitability.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:32px 0 15px;border-bottom:2px solid #e60073;padding-bottom:8px;\"\u003eHobbywing SeaKing 300A HV V4 Specifications\u003c\/h2\u003e\n\n\u003ctable style=\"width:100%;border-collapse:separate;border-spacing:0 8px!important;font-size:14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width:38%;background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eBrand \/ Model\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eHobbywing SeaKing 300A HV V4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eProduct Number\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e30301202\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eESC Type\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eBrushless \/ Sensorless Marine ESC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eContinuous \/ Peak Current\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e300A \/ 1600A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eInput Voltage\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e5–14S LiPo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eBEC Output\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eSwitch-mode, 6V \/ 7.4V \/ 8.4V @ 8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eIP67\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eInput Wires\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eRed 8AWG × 200mm; Black 8AWG × 200mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eInput Connector\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eNot pre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eMotor Output Connection\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eIntegrated 8.0mm female sockets; no separate output wires\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e94 × 58.8 × 43mm (excluding cooling fittings and mounting features)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e443g (including input wires)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eWater-Cooling Port Diameter\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003e3.5mm inner \/ 6.0mm outer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eBuilt-in Bluetooth\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eYes, integrated into the power switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eProgramming\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eHW LINK V2 app, LED Program Box, LCD G2, LCD Pro, OTA Programmer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eData Recording\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003ePeak values, real-time data and historical graph recording\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eFirmware Updates\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#e60073;color:#fff;padding:10px 13px;font-weight:bold;\"\u003eRecommended Boat Length\u003c\/td\u003e\n\u003ctd style=\"background:#f2f2f2;padding:10px 13px;\"\u003eUp to 180cm (manufacturer guidance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n  \n    \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/02_7b9178ce-4bed-472f-a78b-0631fe296a80.png?v=1794471588\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S high Power\"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n \n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003e300A Continuous Power for High-Voltage Marine Setups\u003c\/h2\u003e\n\n\u003cp\u003eThe SeaKing 300A HV V4 is designed for large RC boats with demanding brushless propulsion systems. Its 300A continuous current rating provides greater current-handling capacity than the SeaKing 200A HV V4, while its 5–14S input range accommodates high-voltage marine configurations.\u003c\/p\u003e\n\n\u003cp\u003eA high-current ESC is particularly useful when motor load, propeller selection, hull resistance, and repeated acceleration place substantial demands on the power system. The 1600A peak rating describes the manufacturer's peak current capability; it should not be interpreted as a continuous operating rating.\u003c\/p\u003e\n\n\u003cp\u003eThe aluminum housing and integrated water-cooling structure help manage heat. As with any high-power marine ESC, actual operating temperature depends on sufficient water flow, propeller load, wiring, and the complete power-system configuration.\u003c\/p\u003e\n\n  \n      \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/07_bf2652e0-69bc-4a02-874a-164d7cd2f7b0.png\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S CAPACITOR AND SPARK PROTECTION \"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n  \n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eBuilt-in 4080μF Capacitor Bank and Spark Protection\u003c\/h2\u003e\n\n\u003cp\u003eThe SeaKing 300A HV V4 incorporates a \u003cstrong\u003e4080μF capacitor bank\u003c\/strong\u003e to support high-current operation and reduce the need for additional external capacitors in many installations. This integrated design helps simplify the electrical layout of large RC boats.\u003c\/p\u003e\n\n\u003cp\u003eCapacitor temperature protection monitors thermal conditions and reduces output when the protection threshold is reached. The ESC also incorporates a spark-protection circuit intended to reduce connection sparks when using high-voltage battery systems.\u003c\/p\u003e\n\n\u003cp\u003eThese protections are useful safeguards, but they do not replace correct connector selection, sound solder joints, proper polarity, and suitable battery wiring. Additional capacitor requirements still depend on the particular installation and manufacturer's recommendations.\u003c\/p\u003e\n\n\n        \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/04_aa317800-5fd8-4043-996e-35f3897f4bde.png\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S BLUETOOTH \"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n\n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eBuilt-in Bluetooth and HW LINK V2 App\u003c\/h2\u003e\n\n\u003cp\u003eUnlike ESCs that require a separate Bluetooth adapter for basic mobile programming, the SeaKing 300A HV V4 has Bluetooth integrated into its power-switch assembly.\u003c\/p\u003e\n\n\u003cp\u003eUsing the \u003cstrong\u003eHobbywing HW LINK V2 app\u003c\/strong\u003e, users can configure supported parameters, read performance data, and perform firmware updates directly through a compatible smartphone.\u003c\/p\u003e\n\n\u003cul style=\"padding-left:22px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eParameter adjustment:\u003c\/strong\u003e Configure throttle behavior, motor direction, BEC voltage, timing, and other supported settings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-time monitoring:\u003c\/strong\u003e View available operating information through the app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHistorical data:\u003c\/strong\u003e Review recorded operating data in graph format.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirmware updates:\u003c\/strong\u003e Access supported firmware versions and update the controller.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"font-size:14px;background:#f7f7f7;padding:12px 15px;border-radius:4px;\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Bluetooth communication is intended for nearby setup and data access, with a stated effective range of approximately 5 meters. It is not a long-range telemetry link for monitoring a boat across the water.\u003c\/p\u003e\n\n  \n          \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/11_3001e4be-3221-491c-a57f-342fc425f309.png\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S PROGRAMMING \"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eTwo Ways to Program the ESC\u003c\/h2\u003e\n\n\u003cp\u003eThe SeaKing 300A HV V4 offers more programming flexibility than relying on a mobile app alone. In addition to its built-in Bluetooth connection, it provides a dedicated programming interface.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:14px;margin:18px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px;border:1px solid #ddd;border-radius:6px;padding:16px;background:#fafafa;\"\u003e\n\u003ch3 style=\"font-size:17px;color:#e60073;margin:0 0 8px;\"\u003eHW LINK V2 App\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eWireless configuration, firmware updates, and data monitoring via built-in Bluetooth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px;border:1px solid #ddd;border-radius:6px;padding:16px;background:#fafafa;\"\u003e\n\u003ch3 style=\"font-size:17px;color:#e60073;margin:0 0 8px;\"\u003eExternal Programming Devices\u003c\/h3\u003e\n\u003cp style=\"margin:0;\"\u003eSupports compatible LED Program Box, LCD G2, LCD Pro, and OTA Programmer through the dedicated interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eProgramming accessories are separate from the ESC unless expressly included in a particular package.\u003c\/p\u003e\n\n  \n            \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/10_ccc5ed19-0805-44d5-99c2-3c781097a64f.png\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S TUNING \"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n  \n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003e11 Programmable Parameters and AUX Control\u003c\/h2\u003e\n\n\u003cp\u003eThe SeaKing V4 programming system provides 11 configurable parameter categories, covering running mode, reverse force, LiPo cell count, low-voltage cutoff, BEC voltage, motor rotation, punch, Freewheeling, drag brake, motor timing, and AUX channel function.\u003c\/p\u003e\n\n\u003cp\u003eA separate yellow AUX signal wire can connect to an available receiver channel. With a suitable transmitter control assigned, supported settings can then be adjusted without repeatedly entering the programming menu.\u003c\/p\u003e\n\n\u003cp\u003eFor example, the AUX channel can be configured to control maximum reverse force, punch, or drag-brake force, depending on the selected function.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:18px;color:#111;margin:22px 0 8px;\"\u003eFreewheeling Behavior on the 300A Model\u003c\/h3\u003e\n\n\u003cp\u003eFreewheeling technology supports more controlled throttle release, improved deceleration behavior, and reduced heat under suitable operating conditions.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant model-specific detail:\u003c\/strong\u003e On the SeaKing 300A HV V4, Freewheeling does not have a selectable Disabled option. This differs from some smaller SeaKing V4 models and should be considered when configuring the ESC.\u003c\/p\u003e\n\n\n  \n              \u003cdiv class=\"cnhl-img\"\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/06_cb3adf5b-c18e-4260-8b75-e20197fed62b.png\" alt=\"Hobbywing SeaKing 300A HV V4 5-14S BEC \"\u003e\u003c\/p\u003e  \u003c\/div\u003e\n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eAdjustable Switch-Mode BEC for High-Voltage Servos\u003c\/h2\u003e\n\n\u003cp\u003eThe integrated switch-mode BEC provides selectable \u003cstrong\u003e6.0V, 7.4V, and 8.4V output settings\u003c\/strong\u003e, with an official continuous output current specification of 8A.\u003c\/p\u003e\n\n\u003cp\u003eThis gives builders flexibility when choosing compatible standard-voltage or high-voltage steering servos. Select the BEC voltage according to the operating limits of both the receiver and servo.\u003c\/p\u003e\n\n\u003cp style=\"font-size:14px;background:#fff5fa;border-left:3px solid #e60073;padding:12px 15px;\"\u003eDo not set the BEC voltage above the maximum supported voltage of connected receiver or servo equipment. Higher voltage does not automatically mean better compatibility.\u003c\/p\u003e\n  \n  \n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eWater Cooling, Installation and Connection Guide\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:18px;color:#111;margin:20px 0 8px;\"\u003eWater-Cooling Connections\u003c\/h3\u003e\n\u003cp\u003eThe SeaKing 300A HV V4 uses water-cooling fittings with a 3.5mm inner diameter and 6.0mm outer diameter. Choose compatible cooling tubing and secure all water-line connections to help prevent loosening during operation.\u003c\/p\u003e\n\n\u003cp\u003eVerify reliable water circulation before high-load operation. The IP67 enclosure rating does not eliminate the need for effective cooling.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:18px;color:#111;margin:20px 0 8px;\"\u003eBattery and Motor Wiring\u003c\/h3\u003e\n\u003cp\u003eThe ESC is supplied with red and black 8AWG battery input wires without a pre-installed battery connector. Choose an appropriate high-current connector for the intended battery system and make secure, correctly polarized connections.\u003c\/p\u003e\n\n\u003cp\u003eOn the motor side, the controller uses integrated 8.0mm female sockets rather than separate output leads. Match the motor's three-phase connection system to these sockets.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:18px;color:#111;margin:20px 0 8px;\"\u003eFirst-Time Throttle Calibration\u003c\/h3\u003e\n\u003cp\u003eThrottle-range calibration is required before first use and whenever the transmitter or receiver is changed. Follow the manufacturer's procedure for your transmitter type. Confirm the throttle endpoints and neutral position, and configure an appropriate receiver failsafe before running the boat.\u003c\/p\u003e\n\n\u003cp\u003eKeep the propeller safely clear during all setup procedures. Disconnect the drive battery after use, even when the ESC's power switch is off.\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 15px;border-bottom:2px solid #e60073;padding-bottom:8px;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eWhat batteries does the Hobbywing SeaKing 300A HV V4 support?\u003c\/h3\u003e\n\u003cp\u003eIt supports 5–14S LiPo battery configurations. The complete battery system must also meet the motor's voltage requirements and the application's current demands.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eDoes the SeaKing 300A HV V4 have built-in Bluetooth?\u003c\/h3\u003e\n\u003cp\u003eYes. Bluetooth is integrated into the power-switch assembly, allowing direct connection to the HW LINK V2 smartphone app without an additional Bluetooth module.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eCan I program it without using a smartphone?\u003c\/h3\u003e\n\u003cp\u003eYes. The 300A model includes a separate programming interface compatible with supported Hobbywing LED and LCD programming boxes. The official specifications also list OTA Programmer support.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eWhat is the BEC output current?\u003c\/h3\u003e\n\u003cp\u003eHobbywing specifies an 8A BEC output with selectable voltages of 6V, 7.4V, and 8.4V. This is the rating to use when evaluating continuous receiver and servo power requirements.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eDoes it come with battery connectors?\u003c\/h3\u003e\n\u003cp\u003eNo battery connector is pre-installed. The ESC has red and black 8AWG input wires, so a suitable connector must be selected and installed for the battery system.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eCan Freewheeling be switched off?\u003c\/h3\u003e\n\u003cp\u003eNo. According to the Hobbywing manual, the SeaKing 300A HV V4 does not offer a Disabled option for Freewheeling.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eWhat is the difference between the SeaKing 200A HV V4 and 300A HV V4?\u003c\/h3\u003e\n\u003cp\u003eBoth support 5–14S LiPo systems. The 300A model increases the current rating from 200A continuous \/ 1000A peak to 300A continuous \/ 1600A peak. It also has a different enclosure, motor-output connection arrangement, cooling fitting dimensions, and an independent programming interface. Choose based on the complete motor, battery, cooling, and hull installation requirements.\u003c\/p\u003e\n\n\u003ch3 style=\"font-size:17px;margin:18px 0 6px;\"\u003eIs the ESC fully waterproof?\u003c\/h3\u003e\n\u003cp\u003eThe controller carries an IP67 rating, but waterproof performance can deteriorate with wear or damage. Inspect and dry exposed connections after use as needed, and continue to maintain the cooling system and wiring.\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eHobbywing SeaKing 300A HV V4 Manual\u003c\/h2\u003e\n\n\u003cp\u003eFor throttle calibration, connection diagrams, programming tables, LED indications, and detailed safety instructions, refer to the official user manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/Hobbywing_Seaking_200A_HV_V4_Manual.pdf\" target=\"_blank\" rel=\"noopener\" style=\"color:#e60073;font-weight:bold;text-decoration:underline;\"\u003eDownload Hobbywing SeaKing 300A \/ 200A HV V4 User Manual (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\n\u003cp style=\"font-size:13px;color:#666;\"\u003eThe linked manual covers both the SeaKing 300A HV V4 and SeaKing 200A HV V4. Always check model-specific notes when following shared instructions.\u003c\/p\u003e\n\n\n\u003ch2 style=\"font-size:22px;font-weight:bold;color:#111;margin:34px 0 13px;border-bottom:1px solid #ddd;padding-bottom:8px;\"\u003eExplore More RC Boat ESCs\u003c\/h2\u003e\n\n\u003cp\u003eCompare other \u003ca href=\"\/collections\/hobbywing-seaking-escs\" style=\"color:#e60073;text-decoration:underline;font-weight:bold;\"\u003eHobbywing SeaKing ESCs\u003c\/a\u003e for different current ratings, battery voltages, and marine power-system requirements.\u003c\/p\u003e\n\n\u003cp\u003eYou can also browse our wider range of \u003ca href=\"\/collections\/rc-boat-escs\" style=\"color:#e60073;text-decoration:underline;font-weight:bold;\"\u003eRC boat electronic speed controllers\u003c\/a\u003e to find the right ESC for your next build or upgrade.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n","brand":"ChinaHobbyLine","offers":[{"title":"Global","offer_id":67944756216022,"sku":"30301202 GL","price":269.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0633\/0617\/0582\/files\/001_ff4a82d1-f180-43e3-924c-333014875ae7.webp?v=1794471514","url":"https:\/\/chinahobbyline.com\/products\/hobbywing-seaking-300a-hv-v4-brushless-marine-esc","provider":"ChinaHobbyLine","version":"1.0","type":"link"}