Note, that metric system and SI system is not exactly the same. There are many measures used typically in metric system, that are not official SI. I don't thing you should translate everything to official SI. In fact in most cases it would be counterproductive.

• time: SI unit it s (seconds); minutes, hours, days, years etc. are not SI. Which affects units below
• speed: SI unit is ^m/_s; typical metric unit is ^km/_h
• energy: SI unit is J (joule) = W·s (watt second); typically used metric unit is Wh (watt hour) or kWh (kilo watt hour). Later is very typical when talking about electricity consumption.

Other units used typically within metric system, not being officially part of it:

• temperature: °C (Celsius), SI unit is K (Kelvin)
• angle: ° (degree), SI unit is rad (radian)
• astronomical distances: light year, astronomical unit, SI unit is m (meter)

Note, that metric system and SI system is not exactly the same. There are many measures used typically in metric system, that are not official SI. I don't think you should translate everything to official SI. In fact in most cases it would be counterproductive.

• time: SI unit it s (seconds); minutes, hours, days, years etc. are not SI. Which affects units below
• speed: SI unit is ^m/_s; typical metric unit is ^km/_h
• energy: SI unit is J (joule) = W·s (watt second); typically used metric unit is Wh (watt hour) or kWh (kilo watt hour). Later is very typical when talking about electricity consumption.

Other units used typically within metric system, not being officially part of it:

• temperature: °C (Celsius), SI unit is K (Kelvin)
• angle: ° (degree), SI unit is rad (radian)
• astronomical distances: light year, astronomical unit, SI unit is m (meter)