For DROK item 200139: “DROK Digital Multimeter DC 6.5-100V 20A Voltage Amperage Power Energy Meter DC Volt Amp Tester Gauge Monitor LCD Digital Display with Blue Backlight Measuring Volts Current with Built-in Shunt”

The current will not work for systems like solar, vehicles, recreation vehicles? Amazon reviewer states:

<span class=”a-color-tertiary a-nowrap”>By Fu Qin on August 15, 2020</span>

<span class=”askExpanderContainer noScriptNotDisplayExpander askExpanderExpanded”><span class=”askLongText”>Due to the <span class=”matches”>RV</span> DC distribution panel design, the negative is the common for the entire DC system. This Current measurement is based on negative loop, which is bypassed by the common grounding. This makes the accurate measurement of the current impossible. I have wasted a few days trying to modify the existing DC panel on my <span class=”matches”>RV</span>, but failed to make it work. What a disappointment! However, the voltage circuit works as claimed.       </span></span>

Source: https://www.amazon.ca/gp/product/B017FSED9I/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I have a recreation vehicle which uses a negative ground like all RV’s. I would like to use all the features of this multimeter: voltage, current, power, and energy.

Will this meter work for my RV, or will I have the same problem as Fu Qin? Is there a specific way to wire it so all the meter’s features work properly, or do I have to get a different meter? I would like to solve this problem before I begin the work.

Thank you in advance for your help.