Mountain Wind Trading Company DC - Volt / Amp meter digital display 8.5V to 100V DC Digital Blue LED Display 100 Amps DC Digital Blue LED Display With On/Off switch Finally an affordable, ready to go volt and amp meter for your alternate energy system. will work with 12 ,24 and 48 volt battery banks Use for wind turbines or solar panels This meter does not need a separate power supply A highly-efficient yet flexible volt/amp meter which can be used to measure the voltage of 12, 24 and 48 volt battery banks directly along with their charge or discharge current. No separate power supply is needed! This meter has been designed specifically for alternate energy systems; yet, it also perfect for measuring vehicle, yacht, electric toy, tool or motorcycles having a 12V, 24V or 48V storage batteries. Advantage over other panel meters by competitors: Compared with LCD panel meters, this LED panel meter has a high contrast display with super clear numbers and wide viewing angle. Measures both Volts and Amps (Both charge and discharge.) Super convenient operation (DOES NOT need an additional power supply.) Hook up the leads and you are set. On/Off Switch -- This meter uses only 40ma to 60ma ( .04 to .06 amps) at 24 volts, or approx. 20ma at 48 volts. If you are like many of us who simply do not like wasted energy, regardless of how small it is, then you will love this meter, as you can simply shut if off when you are not using it. Good looking, black matte solid metal face plate, with hinged door. Shunt can be remotely located for direct sensing. Remotely locating the shunt is recommended if you have large wires coming or going from your batteries or charge source. This allows the wires to take a more direct path to the batteries and alleviates the need to route them through the meter case. SHOWN WITH 50 AMP SHUNT. COMES WITH 100 AMP SHUNT BAR