Item specifics
Description
Display Voltmeter Product Overview
This product is a dual‑display battery gauge combining LED bar for battery level and a digital voltmeter. It is suitable for 12V, 24V, 36V, 48V, 60V, 72V, 84V, and 96V battery systems, covering lead‑acid, lithium, Ni‑MH, and other battery types. The upper section uses 8 coloured bars (2 red + 6 green) to show remaining capacity, while the lower 3‑digit 0.56″ LED displays real‑time voltage with auto‑ranging decimal point. It features reverse polarity protection, low power consumption (5‑15mA), ±1% accuracy, a refresh rate of ~300ms, and a waterproof housing. Widely used in e‑bikes, e‑scooters, automotive auxiliary batteries, solar storage, and industrial equipment.
Display Voltmeter Core Features
Dual Display for Full Information： Upper 8‑segment bar (2 red + 6 green) shows remaining capacity (10%,25%,40%,50%,60%,75%,90%,100%); lower 3‑digit 0.56″ LED displays actual voltage – no need to switch modes.
Wide Voltage Auto‑Recognition： Automatically adapts to 12V,24V,36V,48V,60V,72V,84V,96V systems, covering most EVs and energy storage devices. The decimal point auto‑adjusts for clear reading.
High Accuracy： ±1% measurement accuracy, ±1% voltage tolerance, ~300ms refresh rate – real‑time battery status feedback.
Reverse Polarity Protection： Built‑in protection prevents damage if power leads are reversed – safe installation.
Waterproof Design： Suitable for outdoor environments, resistant to rain splash and humidity (check product manual for exact IP rating).
Low Power Consumption： Only 5‑15mA operating current, negligible drain on the battery.
Wide Operating Temperature： Stable operation from -10℃ to 65℃, suitable for most climates.
Easy Installation： Dimensions 48×29×22mm, cutout 46×27mm, 15cm wire leads – direct panel mount.
Display Voltmeter Applications
E‑bikes / E‑scooters： Replace original dash or add‑on to monitor battery level and voltage.
E‑tricycles / Mobility scooters： Works with 12V‑96V systems, clear battery status display.
Automotive auxiliary batteries： Monitor RV, camper, or car auxiliary batteries.
Solar storage systems： Check battery voltage and state of charge for solar banks.
UPS / Emergency power supplies： Display battery status for backup power units.
Industrial vehicles / forklifts： Monitor battery condition in electric industrial equipment.
Display Voltmeter Key Advantages
The dual‑display design eliminates the need for mental conversion of voltage to capacity. The 8‑segment colour bar (2 red for low warning, 6 green for normal) gives an intuitive remaining power indication, while the digital voltage readout provides precise data – ideal for quick status checks by non‑professionals. Automatic voltage recognition removes jumper settings, making it plug‑and‑play. Reverse polarity protection greatly reduces installation errors and after‑sales failures. The waterproof housing stands up to outdoor weather, extending service life. Compared to traditional mechanical gauges, this digital meter offers higher accuracy, faster response, and clearer readout. Whether you are a hobbyist, repair shop, or system integrator, this gauge provides a reliable monitoring solution.
Why Choose QIXINWEI
Years of experience in the electronics industry. Trusted by global customers. Massive In-Stock Inventory – Ready to ship promptly. BOM Matching Service – One-stop solution, save time. PCBA Customization – Professional engineering team creates tailor-made solutions based on your needs. Cost-Effective & Efficient – Better channel, better cost. A dedicated team makes your procurement smoother. Contact us for BOM quotes or PCBA inquiries.
FAQ:
What is this waterproof digital voltmeter and what is it used for?
It is a rugged, wide‑range DC voltmeter designed specifically for electric vehicles, lithium battery packs, and solar energy storage systems. The meter displays the real‑time battery voltage on a bright LED or LCD screen. Its sealed housing protects against rain, mud, and dust, making it ideal for outdoor installation on e‑bikes, motorcycles, golf carts, and marine vessels.
What voltage range does this meter support? Can I use it with a 12V, 48V, or 84V battery?
The meter automatically adapts to any DC voltage from 12 V to 84 V. It is suitable for common battery configurations: 12 V (lead‑acid or LiFePO4 4S), 24 V, 36 V, 48 V, 60 V, 72 V, and up to 84 V (20‑series lithium). The wide input range means you do not need to order a specific voltage model—one meter fits all your low‑voltage and high‑voltage systems.
How do I wire this voltmeter? Is an external power supply needed?
The meter is self‑powered and requires only two wires. Connect the red wire to the battery positive (+) and the black wire to the battery negative (−). The display turns on automatically as soon as power is applied. No external battery, adapter, or separate power source is required because the meter draws its operating current directly from the measured voltage.
Is this voltmeter truly waterproof? Can I leave it outside in the rain?
Yes, the housing is sealed with an IP65‑rated gasket and the display window is fully potted. It can withstand heavy rain, splashing water, and high‑pressure washing. The cable entry is also sealed with a rubber gland. For permanent outdoor installation, ensure the wire exit points downward and the mounting hole is properly sealed to maintain the waterproof rating.
What is the measurement accuracy of this digital voltmeter?
Typical accuracy is ±1% of reading or ±0.1 V, whichever is greater. The internal ADC samples the voltage several times per second and updates the display instantly. The meter is calibrated at the factory and does not drift over time. For critical applications, you can verify the reading against a trusted multimeter; minor variations of a few hundred millivolts are normal.
Can this meter also display current, power, or state of charge (SoC)?
No. This is a dedicated voltmeter; it only measures and displays the battery voltage. It does not have a built‑in shunt for current measurement, nor does it calculate remaining capacity or power. If you need a full battery monitor with current and ampere‑hour counting, you should look for a coulomb‑meter or an LCD battery fuel gauge module.
Can I use this meter with both lithium and lead‑acid batteries? Does the chemistry matter?
Yes, the meter works with any battery chemistry as long as the voltage is within 12 V–84 V DC. It simply measures the terminal voltage; it does not know or care about the battery type. For a quick state‑of‑charge estimation, you will need to know the voltage‑to‑capacity relationship for your specific battery (e.g., 4.2 V per cell for a fully charged Li‑ion pack).
How can I install this voltmeter? What is the panel cut‑out size?
The meter is designed for flush panel mounting. A typical round meter requires a cut‑out diameter of about 29–30 mm. The meter body slides through the hole and is secured from behind with a locking nut or two mounting screws, depending on the model. The compact housing protrudes only a few millimeters from the panel, giving a clean, factory‑look installation on handlebars, dashboards, or battery boxes.
Does the meter consume power when the vehicle is off? Will it drain my battery?
The meter draws a very small quiescent current—typically less than 10 mA—while it is connected. If left permanently wired to the battery, it will slowly discharge it over many months. To avoid this, it is best to connect the meter after the ignition switch or through a dedicated toggle switch, so it turns off when the vehicle is not in use.
What are the most common applications for this wide‑range waterproof voltmeter?
It is widely used on electric bicycles, scooters, motorcycles, golf carts, trolling motors, solar charge controllers, camping battery boxes, and forklifts. Any 12 V–84 V DC system that needs a quick, reliable voltage reading in a wet or dusty environment will benefit from this simple, durable instrument.