Koostarvesti on arvesti, mida saab kasutada nt olukordades, kus tarbimistariifid varieeruvad sõltuvalt sellistest teguritest nagu kellaaeg või nädalapäev, tehes vahet tipp- ja mittetippperioodidel, ning mis hõlmab mitme alammõõturi paigaldamist põhiarvesti kõrvale.
A combined meter is a meter that can be used, for example, in situations where consumption tariffs vary depending on factors such as time of day or day of the week, distinguishing between peak and off-peak periods, and which involves installing several submeters next to the main meter.
