{"product_id":"2-wire-digital-voltmeter-dc-5v-120v-electric-vehicle-panel-meter","title":"2-Wire Digital Voltmeter DC 5V–120V | Anti-Reverse EV Meter","description":"\u003ch2\u003e2-Wire Digital Voltmeter – DC 5V to 120V with Anti-Reverse Connection Protection\u003c\/h2\u003e\n\u003cp\u003eMonitor your DC voltage with confidence using this compact, high-precision digital voltmeter. Designed for electric vehicles, battery banks, solar systems, and DIY electronics projects, this 2-wire panel meter requires \u003cstrong\u003eno external power supply\u003c\/strong\u003e — it draws power directly from the circuit being measured. Available in Red, Green, and Blue LED display options, it delivers clear, real-time voltage readings at a glance.\u003c\/p\u003e\n\u003cp\u003eMade in China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Measurement Range:\u003c\/strong\u003e DC 5V to 120V — suitable for a broad range of DC applications including electric vehicles, battery packs, and power supplies\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo External Power Needed:\u003c\/strong\u003e 2-wire design powers itself directly from the measured circuit — quick and easy installation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnti-Reverse Connection Protection:\u003c\/strong\u003e Built-in reverse polarity protection prevents damage if wires are accidentally connected the wrong way\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Voltage Withstand:\u003c\/strong\u003e Safely withstands up to 132V input without damage (note: voltages above 132V may cause permanent damage)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Accuracy:\u003c\/strong\u003e ±1% tolerance for reliable, consistent readings\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Start Voltage:\u003c\/strong\u003e Begins operating at just 4V — ideal for low-voltage monitoring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Color Options:\u003c\/strong\u003e Choose Red, Green, or Blue display to match your project or panel design\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Panel-Mount Design:\u003c\/strong\u003e Easy to install into dashboards, enclosures, or custom panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 5V – 120V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Input Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 132V (do not exceed)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy \/ Tolerance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±1%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;100K Ohms\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed \u0026lt;23mA | Green \u0026lt;18mA | Blue \u0026lt;13mA\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eExternal Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48 × 29 × 22 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePanel Cutout (Hole Size)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e46 × 27 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWorking Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-20°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Colors Available\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRed, Green, Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Digital Voltmeter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eElectric scooters, e-bikes, and electric vehicles\u003c\/li\u003e\n  \u003cli\u003e12V, 24V, 48V, and 72V battery monitoring\u003c\/li\u003e\n  \u003cli\u003eSolar panel and off-grid power systems\u003c\/li\u003e\n  \u003cli\u003eDIY electronics, Arduino, and maker projects\u003c\/li\u003e\n  \u003cli\u003eCustom control panels and enclosures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDo not exceed 132V input — voltages above this may permanently damage the meter\u003c\/li\u003e\n  \u003cli\u003eDue to manual measurement, please allow ±1–3mm size tolerance\u003c\/li\u003e\n  \u003cli\u003eActual LED color may vary slightly from images due to screen display differences\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0–10\/0–12\/0–25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does this digital voltmeter need a separate power supply to operate?\u003c\/h4\u003e\n\u003cp\u003eA: No — this is a 2-wire voltmeter that powers itself directly from the circuit being measured. As long as the measured voltage is within the DC 5V–120V range, no additional power supply is required.\u003c\/p\u003e\n\u003ch4\u003eQ: What happens if I connect the wires the wrong way?\u003c\/h4\u003e\n\u003cp\u003eA: This voltmeter features built-in anti-reverse connection protection, so accidental reverse polarity will not damage the unit. It's a key safety feature that makes installation worry-free, especially for beginners.\u003c\/p\u003e\n\u003ch4\u003eQ: Is this voltmeter suitable for monitoring electric vehicle or e-bike batteries?\u003c\/h4\u003e\n\u003cp\u003eA: Yes — this meter is specifically designed to be compatible with most electric vehicles, e-bikes, and scooters. It supports common EV battery voltages including 12V, 24V, 48V, 60V, and 72V systems within its DC 5V–120V range.\u003c\/p\u003e\n\u003ch4\u003eQ: What panel cutout size do I need to install this voltmeter?\u003c\/h4\u003e\n\u003cp\u003eA: The required panel cutout (hole size) is 46 × 27 mm. The overall body dimensions are 48 × 29 × 22 mm, making it a compact and easy-to-mount panel meter for dashboards and enclosures.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this digital voltmeter need a separate power supply to operate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this is a 2-wire voltmeter that powers itself directly from the circuit being measured. As long as the measured voltage is within the DC 5V–120V range, no additional power supply is required.\"}}, {\"@type\": \"Question\", \"name\": \"What happens if I connect the wires the wrong way?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This voltmeter features built-in anti-reverse connection protection, so accidental reverse polarity will not damage the unit. 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