WindyNation AccuMax Watt Volt Ammeter Power Meter Analyzer Wind Solar RC Bright backlit LCD display provides real-time DC power information such as Watts, Amps, Volts, Amp-hours, Kilo-Watt-hours, etc. Extremely easy to install. See photo gallery for installation examples. Low power consumption of7mA; Provides accurate and precise system power information; Can be installed in any DC system operating under 50A and 60VDC. Can be used with solar panel and wind turbine off-grid systems, RC cars and planes, monitoring DC Loads, monitoring battery charging, etc. Very versatile: Can be installed anywhere in a DC circuit.