--- product_id: 110420901 title: "B0138c" brand: "ketotek" price: "₨23461" currency: LKR in_stock: true reviews_count: 13 category: "Ketotek" url: https://www.desertcart.lk/products/110420901-b0138c store_origin: LK region: Sri Lanka --- # 100A max current 0-9999 kWh energy tracking 6.5-100V DC range B0138c **Brand:** ketotek **Price:** ₨23461 **Availability:** ✅ In Stock ## Summary > ⚡ Power up your control — master your energy like a pro! ## Quick Answers - **What is this?** B0138c by ketotek - **How much does it cost?** ₨23461 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/110420901-b0138c) ## Best For - ketotek enthusiasts ## Why This Product - Trusted ketotek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Voltage Alarm:** Set custom voltage alerts to protect your battery and devices proactively. - • **Energy Usage Insights:** Monitor kWh consumption to optimize battery life and power management. - • **Crystal Clear LCD Display:** Backlit screen ensures real-time data visibility even in low light. - • **4-in-1 Precision Monitoring:** Track voltage, current, power & energy seamlessly in one sleek panel. - • **Wide DC Voltage & Current Range:** Handles 6.5V to 100V and up to 100A for versatile applications. ## Overview The KETOTEK Digital Ammeter Voltmeter is a compact, 4-in-1 DC multimeter designed for precise monitoring of voltage (6.5-100V), current (up to 100A), power (up to 10kW), and energy consumption (up to 9999 kWh). Featuring a large backlit LCD, voltage alarm, and data retention on power off, it’s ideal for managing batteries, solar setups, and electric vehicles indoors. Includes a 100A/75mV shunt for accurate current measurement, making it a cost-effective tool for professionals and DIY enthusiasts aiming to extend battery life and optimize energy use. ## Description 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 : desertcart.co.uk: DIY & Tools Review: Good value and it works - I bought the 100A + 100A/75mV shunt - Useful in helping prolong the life of my leisure batteries. Because I have a 95AH battery (total ~ 1100 watts), when the energy shows 600w after use following a full charge, I know I am around 50% discharged and can switch batteries. For those who don’t know, a cycle of 50% discharge followed by full charge is recommended to extend battery life. If, like me you can’t afford full Vitron kit then this is very useful to monitor battery usage. It measures energy consumed rather than load voltage as some do (some meters show a percentage battery consumption based on load voltage) so it can tell me when I’ve used 50% of my leisure battery. For those with solar kit, the energy used number won’t help much on its own if you are solar charging. You will see battery drain current and load volage which is still useful but because it doesn’t show current flowing into the battery only out and therefore it’s difficult to work out charge state. (You could use several units but I haven’t tried multiple units) Before I put this in my self-build motorhome, I thought I would test it as the shut resister looked bent. I have 2 leisure batteries; one a 95 Ah 12v wet acid by Bosch and one an import brand 110Ah AGM. I have a switch to connect 1 or 2 or both. The idea being that I charge them fully, reset the meter (hold down the button until it says reset) then use battery 1 on its own until energy reads 600w then switch to battery 2. As most our trips are off mains, short trips I suspect I am draining one battery too much by switching after 3 days as I do now. The picture shows my lab bench PSU throwing out 12.5v @ 3amp and is powering a 40w bulb. The shunt is connected to the negative terminal as it does in the van. My bench PSU is rounding the numbers to 1 decimal place and the Ketotek is showing a more accurate 2.98 amp. Not bad for a 100amp shunt resister. I left it running for many hours and the energy reading was also accurate. It doesn’t come with a surface mount box for the meter or the shunt but that’s ok because I am recessing mine. I also have a suitable box for the shunt resistor. I also like the LCD back light which is a single button press on/off. You can set voltage alarm which flashes the backlight so you could set it to 11.9 but I don’t think that would be much use. All in all, my view is that it is accurate and good value for money. Review: Decent shunt works well - So long as you know how to wire it well, this works well, and works well within it’s rated current. If you try to put more through it, it will heat up quite a lot but then again it isn’t designed for more than 100a. Display is good. Only thing is that there is no mounting holes on the display so it is difficult to mount on anything but that’s it. ## Features - 【4 in 1 multimeter】 This digital DC ammeter voltmeter is used to measure the voltage, current, energy and active power of electrical devices. - 【Measuring range】 Voltage test range: DC 6.5~100V, current test range: 0~100A, active power test range: 0~10kW, energy test range: 0~9999kWh. Please DO NOT exceed the rated parameters. - 【More function】 Large LCD display with backlight; voltage alarm function; energy reset function; Data storage when power off. - 【Wide application】 This DC volt amp meter is suitable for indoor use and cannot be used outdoors. It can be used to monitor the volt, amp, power and energy usage of battery, solar system, electric bicycle generator and other fields. The load cannot exceed the rated voltage and current. - 【Package】 Package: 1*DC multimeter, 1*100A/75mV shunt, 1*User Manual (English). Pay attention: Please connect according to the wiring diagram we provide. The wrong connection will cause the product to burn out or not work. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PJPQC14 | | Best Sellers Rank | 75,490 in DIY & Tools ( See Top 100 in DIY & Tools ) 101 in Voltage Testers | | Brand | KETOTEK | | Colour | black | | Country Of Origin | China | | Customer Reviews | 4.3 4.3 out of 5 stars (854) | | Item Dimensions | 9 x 4.7 x 2.4 centimetres | | Item Weight | 0.07 Kilograms | | Manufacturer | KETOTEK | | Maximum Operating Voltage | 100 Volts | | Measurement Type | Ammeter, Multimeter, Voltmeter | | Minimum Operating Voltage | 6.5 Volts (DC) | | Model Number | KT-D138+Shunt 100A | | Power Source | Battery Powered | | Specification Met | CE | | Style Name | Voltage | | UPC | 723260105949 | ## Product Details - **Brand:** KETOTEK - **Colour:** black - **Item weight:** 0.07 Kilograms - **Power source:** Battery Powered - **Style:** Voltage ## Images ![B0138c - Image 1](https://m.media-amazon.com/images/I/719n+dXwrtL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Can someone tell me how to reset the energy count?** A: 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. **Q: 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.** A: 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. **Q: what is the voltage accuracy at around 25volts (counts)** A: 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. **Q: How would this be wired in to a 12v system? Mine has arrived but without instructions it isn’t very clear?** A: Hello, please refer to the wiring diagram in our product description, or you can send message to us for the wiring diagram, thank you ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good value and it works *by P***A on 13 September 2021* I bought the 100A + 100A/75mV shunt - Useful in helping prolong the life of my leisure batteries. Because I have a 95AH battery (total ~ 1100 watts), when the energy shows 600w after use following a full charge, I know I am around 50% discharged and can switch batteries. For those who don’t know, a cycle of 50% discharge followed by full charge is recommended to extend battery life. If, like me you can’t afford full Vitron kit then this is very useful to monitor battery usage. It measures energy consumed rather than load voltage as some do (some meters show a percentage battery consumption based on load voltage) so it can tell me when I’ve used 50% of my leisure battery. For those with solar kit, the energy used number won’t help much on its own if you are solar charging. You will see battery drain current and load volage which is still useful but because it doesn’t show current flowing into the battery only out and therefore it’s difficult to work out charge state. (You could use several units but I haven’t tried multiple units) Before I put this in my self-build motorhome, I thought I would test it as the shut resister looked bent. I have 2 leisure batteries; one a 95 Ah 12v wet acid by Bosch and one an import brand 110Ah AGM. I have a switch to connect 1 or 2 or both. The idea being that I charge them fully, reset the meter (hold down the button until it says reset) then use battery 1 on its own until energy reads 600w then switch to battery 2. As most our trips are off mains, short trips I suspect I am draining one battery too much by switching after 3 days as I do now. The picture shows my lab bench PSU throwing out 12.5v @ 3amp and is powering a 40w bulb. The shunt is connected to the negative terminal as it does in the van. My bench PSU is rounding the numbers to 1 decimal place and the Ketotek is showing a more accurate 2.98 amp. Not bad for a 100amp shunt resister. I left it running for many hours and the energy reading was also accurate. It doesn’t come with a surface mount box for the meter or the shunt but that’s ok because I am recessing mine. I also have a suitable box for the shunt resistor. I also like the LCD back light which is a single button press on/off. You can set voltage alarm which flashes the backlight so you could set it to 11.9 but I don’t think that would be much use. All in all, my view is that it is accurate and good value for money. ### ⭐⭐⭐⭐⭐ Decent shunt works well *by T***K on 22 June 2020* So long as you know how to wire it well, this works well, and works well within it’s rated current. If you try to put more through it, it will heat up quite a lot but then again it isn’t designed for more than 100a. Display is good. Only thing is that there is no mounting holes on the display so it is difficult to mount on anything but that’s it. ### ⭐⭐⭐⭐ Bought for RV Camper van *by A***R on 2 August 2020* Good little meter. Installed in my camper van. Reads small loads despite having the 100A version. I had hoped it would read both the load and then show negative load when my PV panels are feeding back in to the battery, but it just reads 0A, so not intelligent, but to be honest this function wasn't described, in the description, so just my wishful thinking. ## Frequently Bought Together - 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 - Kohree Master Switch Battery Disconnect Isolator Switch 12V-48V Battery Cut Off Switch, Master Switch Batterie, Master Power Cut-off Switch Kit, Car Battery Power Switch for Yacht Boat Truck Bus Car --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.lk/products/110420901-b0138c](https://www.desertcart.lk/products/110420901-b0138c) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-05-07*