Can someone tell me how to reset the energy count?

Hello. The "Chinglish" instructions are as follows. Step 1: Long press the key until the power display area display "clr", then release the key. Step 2: At this moment, the energy is flashing to prompt this is the energy reset state, if short press the key again, then the energy value is cleared and exit the reset flashing state. Step 3: If there is no operation within 5 seconds, it means the energy value is not cleared and will exit the reset state. Hope that this helps.

Does it matter which way up the shunt goes. For instance, the writing on the side does it face up or down or does it not matter.

The shunt can be wired on the positive or negative feed wire, it's position does not matter, just cover the terminals with insulating tape or duct tape. Hope this helps. I have found it very useful for monitoring power usage from the battery. I use another meter with the shunt built in to monitor what my solar panel puts into my battery so the readings combined give me an accurate daily figure of how much battery power I have available.

what is the voltage accuracy at around 25volts (counts)

I use this meter on a 12 volt caravan system linked in to a solar panel for charging the battery and a second unit fitted on the usage side, I have checked voltage displayed with a quality multi meter and both have showed the same readings, I'm very satisfied with the performance and accuracy of both units. I imagine that it should perform equally well on other voltages within it's operating rang as it is doing on my setup.

How would this be wired in to a 12v system? Mine has arrived but without instructions it isn’t very clear?

Hello, please refer to the wiring diagram in our product description, or you can send message to us for the wiring diagram, thank you

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⚡ Power up your precision — never miss a watt or a volt!

SMART VOLTAGE ALARM - Stay ahead with instant alerts to prevent overloads and protect your system.
ENERGY DATA RETENTION - Power off? No worries—your usage stats are saved for continuous insights.
CRYSTAL CLEAR LCD DISPLAY - Backlit screen ensures easy reading anytime, reducing guesswork.
4 IN 1 PRECISION MONITORING - Track voltage, current, power & energy seamlessly in one sleek device.
WIDE VOLTAGE CURRENT RANGE - Supports DC 6.5V to 100V and up to 100A for versatile applications.

The KETOTEKA Digital DC Ammeter Voltmeter is a compact, battery-powered multimeter designed for professional-grade monitoring of voltage (6.5-100V), current (up to 100A), power (up to 10kW), and energy consumption (up to 9999kWh). Featuring a large backlit LCD, voltage alarm, and data retention, it’s ideal for indoor use in solar systems, electric bikes, and battery setups, ensuring accurate, real-time electrical diagnostics.

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Manufacturer	KETOTEK
Part number	KT-D138+Shunt 100A
Item Weight	70 g
Product Dimensions	8.96 x 4.68 x 2.44 cm; 70 g
Item model number	KT-D138+Shunt 100A
Size	100A+100A/75mV shunt
Colour	Black
Style	Voltage
Material	ABS
Power source type	Battery Powered
Specification met	CE
Batteries included?	No
Batteries Required?	No

KETOTEK Ammeter Voltmeter Digital DC 6.5V~100V 100A Volt Amp Watt KWh Meter Gauge LCD Display Panel with Shunt, Current Voltage Power Energy Monitor Tester Multimeter

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