Possibly the most important component of an electrical setup. Stop your motors overheating, your escs buring and your batteries puffing. Read What's a Watt Meter for? to get a comprehensive understanding of why and how you should use this vital piece of equipment.


Quite possibly the most important piece of equipment you'll buy. Although budget priced, this is a comprehensive power meter for setting up motors and ESC’s. This really is a must have piece of equipment for electric flight and ideal for ascertaining correct propeller sizes. All too often motors, ESC’s and Li-po packs are damaged or destroyed simply because an incorrectly sized prop has been used. This usually results in overstressing all components and the ultimate destruction of at least the ESC. The clear LCD screen is uncluttered and easy to read with various functions being accessed via 3 push buttons. Despite the price, this unit is housed in a nicely finished robust anodised aluminium case.

A Deans type sockets is incorporated at each end of the case for battery input and output to the ESC motor combination under test. The example supplied for testing did not have any written instructions other than those printed on the rear of the case. Despite this the unit really is a simple to use instrument and has an excellent battery analysing facility via a balance plug add on board. A sample 2250 3S Li-po was plugged in and the unit immediately started to bleep and show imbalance of cells on the LCD display.

As supplied the unit comes with one short Deans to Deans plug lead and the multi-way balance lead socket arrangement which is terminated with a removable plug. A maximum input of 60 volts is permissible and a total of 100 amps current measuring capacity. (6kw)

One of these nice little units will take all of the guess work and accompanying hazards out of setting up new power combinations. Smoking motors, deep fried crispy ESC’s and dangerously bulging Li-po’s should be history if such a device is used. Seeing the necessary information on the display gives plenty of time and warning that all is not well, much better than any theoretical graph!