does anyone know of a volt/ammeter in one unit? Similar to the link below, however I would like for the ammeter part to show whether it is charging/discharging ( with a pos '+' sign or neg '-' sign). There are LCDs that do it for one measurement (vltg or Amps), however have not been able to find a display that concurrently updates both. Thanks!
http://www.mpja.com/Mini-Panel-Meter-Dual-LED-Display-30-Volts-100-Amps-DC/productinfo/32063 ME
http://www.mpja.com/Mini-Panel-Meter-Dual-LED-Display-30-Volts-100-Amps-DC/productinfo/32063 ME