Well, the base unit will monitor amperage and voltage. And to get temp, all you need is the temp probe (just a thermistor attached to a servo plug really).
These are what you need:
http://www3.towerhobbies.com/cgi-bin...&I=LXTNL1&P=ML (make sure you get the 150A version)
http://www3.towerhobbies.com/cgi-bin...&I=LXPBP3&P=ML