{"product_id":"victron-smartshunt-300a-battery-monitor-bluetooth","title":"Victron SmartShunt 300A\/50mV Battery Monitor — Bluetooth, 6.5–70V (No Display)","description":"\u003cp\u003e\u003cstrong\u003eThe Victron SmartShunt 300A is the compact, budget-friendly battery monitor in the SmartShunt family\u003c\/strong\u003e — sized for smaller 12V systems where peak current stays under 300A. Same Victron measurement firmware and same ±0.4% accuracy as the larger shunts, in a smaller, cheaper package. Ideal for van builds, small RVs, day-sailing boats, and modest off-grid installs.\u003c\/p\u003e\n\n\u003cp\u003eNo display — your phone is the screen via Bluetooth and the free VictronConnect app. View real-time state-of-charge, voltage, current, power, time-remaining, and 30 days of historical trend data.\u003c\/p\u003e\n\n\u003ch2\u003eIs 300A enough for my system?\u003c\/h2\u003e\n\u003cp\u003eThe shunt size needs to handle your peak current — that's typically driven by your inverter size on the discharge side, and your alternator + solar on the charge side.\u003c\/p\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eInverter size (12V)\u003c\/th\u003e\n\u003cth\u003ePeak current draw\u003c\/th\u003e\n\u003cth\u003e300A shunt suitable?\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e1000W\u003c\/td\u003e\n\u003ctd\u003e~83A continuous, ~170A surge\u003c\/td\u003e\n\u003ctd\u003eYes — comfortable headroom\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e1500W\u003c\/td\u003e\n\u003ctd\u003e~125A continuous, ~250A surge\u003c\/td\u003e\n\u003ctd\u003eYes — close to limit, fine for most use\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e2000W\u003c\/td\u003e\n\u003ctd\u003e~167A continuous, ~330A surge\u003c\/td\u003e\n\u003ctd\u003eBorderline — surges can clip; consider 500A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e3000W\u003c\/td\u003e\n\u003ctd\u003e~250A continuous, ~500A surge\u003c\/td\u003e\n\u003ctd\u003eNo — choose the 500A or 1000A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eAdd ~30% headroom for charging + simultaneous loads.\u003c\/strong\u003e If you're unsure, oversize to the SmartShunt 500A — only $15 more and you get peace of mind for future expansion.\u003c\/p\u003e\n\n\u003ch2\u003eWhy the SmartShunt 300A\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSame accuracy as the BMV-712\u003c\/strong\u003e — ±0.4% precision on lithium, AGM, gel, and flooded batteries.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBluetooth built-in\u003c\/strong\u003e — pair directly with VictronConnect on iPhone or Android.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrue state-of-charge\u003c\/strong\u003e — counts every amp in and out for fuel-gauge accuracy, not voltage guessing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVE.Direct port for Cerbo GX\u003c\/strong\u003e — plug into a Cerbo GX for full system integration and VRM Portal remote monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProgrammable auxiliary input\u003c\/strong\u003e — temperature, midpoint voltage, or second battery monitoring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVE.Smart Networking\u003c\/strong\u003e — shares battery data wirelessly with other Victron devices to coordinate charging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact install footprint\u003c\/strong\u003e — smaller physical shunt, easier to fit in tight battery compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSmartShunt 300A \/ 50mV precision shunt with built-in electronics and Bluetooth\u003c\/li\u003e\n  \u003cli\u003eBattery cable with M10 fuse holder\u003c\/li\u003e\n  \u003cli\u003eUTP cable for auxiliary input\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eBattery voltage range\u003c\/th\u003e\n\u003ctd\u003e6.5–70 VDC (works on 12V, 24V, 48V systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eCurrent measurement range\u003c\/th\u003e\n\u003ctd\u003e-300 to +300A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eShunt rating\u003c\/th\u003e\n\u003ctd\u003e300A \/ 50mV\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e±0.4%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eResolution\u003c\/th\u003e\n\u003ctd\u003e10 mA \/ 0.01V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003eBuilt-in (VictronConnect app)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eVE.Direct port\u003c\/th\u003e\n\u003ctd\u003eYes (for Cerbo GX integration)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eVE.Smart Networking\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eAuxiliary input\u003c\/th\u003e\n\u003ctd\u003eTemperature \/ midpoint \/ second battery voltage\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eDisplay\u003c\/th\u003e\n\u003ctd\u003eNone — uses your phone via Bluetooth\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eEnclosure rating\u003c\/th\u003e\n\u003ctd\u003eIP21 (indoor \/ dry mounting)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOperating temperature\u003c\/th\u003e\n\u003ctd\u003e-40°C to +50°C (-40°F to +122°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eManufacturer SKU\u003c\/th\u003e\n\u003ctd\u003eSHU050130050\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5 years (manufacturer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eRecommended applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact van builds\u003c\/strong\u003e — 100–200Ah lithium house bank with a 1000–1500W inverter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSmall RV \/ teardrop trailer\u003c\/strong\u003e — basic 12V house system, USB-only outlets plus small inverter\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDay-sailing boat\u003c\/strong\u003e — single house battery with electronics and minimal inverter use\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShed \/ hobby cabin solar\u003c\/strong\u003e — small 12V off-grid setup with 100–400W of panels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrolling motor monitoring\u003c\/strong\u003e — bass boats and small fishing boats\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTruck camper\u003c\/strong\u003e — modest 12V system in a slide-in camper\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhich SmartShunt size do I need?\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eMax current\u003c\/th\u003e\n\u003cth\u003eTypical use\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSmartShunt 300A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e±300A\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eCompact 12V — vans, small RVs, small boats\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSmartShunt 500A\u003c\/td\u003e\n\u003ctd\u003e±500A\u003c\/td\u003e\n\u003ctd\u003eMost 12V\/24V RV, marine, off-grid (most popular)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSmartShunt 1000A\u003c\/td\u003e\n\u003ctd\u003e±1000A\u003c\/td\u003e\n\u003ctd\u003eLarger 24V\/48V with high-current inverters\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eSmartShunt 2000A\u003c\/td\u003e\n\u003ctd\u003e±2000A\u003c\/td\u003e\n\u003ctd\u003eLarge 48V off-grid, multi-Quattro, very big banks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eFor wet, outdoor, or marine engine room installs, see the \u003cstrong\u003eSmartShunt 300A IP65\u003c\/strong\u003e version.\u003c\/p\u003e\n\n\u003cp\u003eEvery Jonsson Tech order ships within 5 days nationwide from our Houston, Texas warehouse. Free pre-purchase sizing consultation — call \u003cstrong\u003e346-574-9652\u003c\/strong\u003e or email \u003ca href=\"mailto:support@jonssontech.net\"\u003esupport@jonssontech.net\u003c\/a\u003e with your inverter size, battery capacity, and typical loads and we'll confirm the right shunt before you buy.\u003c\/p\u003e","brand":"Victron Energy","offers":[{"title":"Default Title","offer_id":48191178113243,"sku":"SHU050130050","price":85.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/3200\/9947\/files\/300ashunt.jpg?v=1769429371","url":"https:\/\/www.jonssontech.net\/products\/victron-smartshunt-300a-battery-monitor-bluetooth","provider":"Jonsson Tech LLC ","version":"1.0","type":"link"}