Aofan Red LED Digital Voltmeter, 5–30V DC

Aofan’s LED Digital Voltmeter is a compact red-display meter for monitoring DC voltage in vehicle electrical systems. Its claimed 5–30V measuring range and 29mm dashboard fit are useful for installations where a small, glanceable readout is wanted, but the listed power configuration and operating limits should be checked against the intended setup.

At a glance

Three-digit red LED display is claimed to show DC voltage from 5 to 30V.
The listing claims compatibility with 12V and 24V vehicle electrical systems.
Specified 29mm dashboard hole and nylon locking ring suit a compact panel installation.
The listing states an IP65 rating and corrosion-resistant housing.

Price

£6.39Save 20%

Reference price: ~~£7.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Compact panel-mounted format with a bright red numerical display for quick voltage checks.
The stated range covers the listing’s intended 12V and 24V vehicle systems.
A 29mm mounting hole and screw-terminal connection provide specific installation dimensions to plan around.

Cons

The stated ±0.5V accuracy is relatively coarse for buyers needing precise voltage measurements.

Technical specifications

18 specifications

Identity
Brand	Aofan
Measurement type	Voltmeter
Colour	red
Power configuration	Battery Powered

Electrical and display
Operating range	DC 5-30V
Display	3-digit red LED
Accuracy	±0.5V
Compatible systems	12V/24V electrical systems

Construction and environment
Water resistance	IP65
Housing material	ABS+PC composite
Operating temperature	-20℃~70℃
Upper temperature rating	70 Degrees Celsius
Specification met	CE

Dimensions and installation
Mounting hole diameter	29mm
Dimensions	36×16×29mm
Weight listed	20 Grams
Input connection	2-pole screw terminals

Compatibility
Compatible devices	Cars, motorcycles, trucks, RVs, boats, ATVs, and other recreational vehicles

What to know before buying

Listing details to confirm

The listing is inconsistent about power, describing the meter as battery powered while also specifying a wired 2-pole screw-terminal input. Its title emphasizes 12–24V, while feature text gives a 5–30V measuring range, and the detailed operating-temperature range is -20℃~70℃ alongside a separate 70 Degrees Celsius upper rating. Confirm wiring, actual system compatibility and installation dimensions for the selected listing. The overcharge/discharge language describes monitoring and detecting voltage irregularities, not automatic battery protection.

What’s in the box

Included

LED digital voltmeter

Who is it for?

A good fit for

Vehicle owners wanting a small dashboard readout to monitor battery or charging voltage in cars, motorcycles, trucks, RVs or boats.
DIY installers whose panel can take a 29mm hole and whose system voltage is within the stated DC range.

Less suited to

Buyers needing an automatic battery cut-off or overcharge/discharge prevention device.
Installations requiring finer than the stated ±0.5V accuracy or a verified mounting fit without checking dimensions.

Aofan Red LED Digital Voltmeter, 5–30V DC · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 97 ratings

5 stars64%64%
4 stars23%23%
3 stars3%3%
2 stars4%4%
1 star6%6%

Aggregate ratings lean positive, with most ratings in the four- and five-star categories, but a smaller share is one- or two-star. Without written feedback, the reasons are unknown. Treat this as limited context rather than confirmation of display accuracy, waterproofing or installation fit, and rely on the stated range and dimensions for suitability.

Frequently asked questions

What voltage range does the listing specify?

The detailed description states DC 5-30V, while the title and compatibility claims refer to 12V and 24V systems. Check the range and system suitability before installation.

What size dashboard opening is specified?

The listing states a 29mm mounting-hole diameter. It also gives overall dimensions of 36×16×29mm, so compare those measurements with the available panel space.

Does this meter protect a battery from overcharging?

The listing says it helps monitor charging status and detect voltage irregularities. It does not establish automatic cut-off or active protection.

What should be checked about its power connection?

The product details call it battery powered, but the description specifies 2-pole screw terminals. Confirm the actual wiring arrangement for the selected listing.