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Control water geyser 2000w with sonoff basic 10 amps

Hi community, This is my first post here. I would like to control power of water heater 2000w /230v using sonoff basic 10 amps. I would like to ask: 1. Is it sufficient to just use this device with a contactor? If yes kindly suggest one 2. Is sonoff Pow r2 a better choice than basic? Thanks.

The Sonoff Basic can be used at 2300 watts, but I'd rather use the Power R2 for that, it will still measure consumption.
And suggestion on contactors?
You no longer need a contactor if you have a Power R2
Cool that should save me some money

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