Shabbat timers

Why a smart Shabbat timer

A mechanical Shabbat timer is limited to one point, to quarter-hour accuracy and to fixed times. A Shelly relay sits behind the wall switch or in the electrical panel and lets you schedule any point in the house, to the minute, with automatic adjustment to sunset times as they change through the year. The schedule is stored in the device itself, so it runs even when the network is down.

Shabbat timers for the electrical panel

In the electrical panel, instead of a mechanical Shabbat timer, you install Shelly Pro devices on a DIN rail: Pro 4PM for four circuits with power metering, Pro 2PM for two, and Pro 3 for three dry-contact circuits. Behind the wall switch, Shelly 1, 1PM and 2PM are the right fit, and Shelly 1L and 2L when there is no neutral wire in the box. All settings are done in the Shelly app, with no subscription and no monthly fee.

3-phase Shabbat timers

For a 3-phase load such as central air conditioning, a pump or a large oven, Shelly Pro 3 is the right fit: three 16 A dry-contact relays (up to 48 A in total) that can switch three separate phases or drive a contactor coil. For larger loads, the relay drives a contactor and the contactor drives the load.

Shabbat timers for air conditioners

A home air conditioner on its own circuit can use a Shelly 1PM, which turns it on and off on schedule and measures how much it uses. Central or 3-phase air conditioning is switched through a contactor. When a relay drives a contactor coil, it's worth adding a Snubber, which keeps the device from resetting. The full explanation is in the Snubber guide.

A digital Shabbat timer with an app

Unlike a regular digital Shabbat timer, you set the times from your phone rather than with tiny buttons on the panel: a weekly schedule, times based on sunset and sunrise that update on their own through the year, and remote changes when your plans change. More on smart homes for Shabbat-observant households.

How much does a Shabbat timer for the electrical panel cost?

• Behind the wall switch: Shelly 1 Mini Gen4: ₪79, and Shelly 1PM Gen4 for a water heater, oven or lighting: ₪115.
• Without a neutral wire: Shelly 1L Gen3: ₪149.
• For the electrical panel: Shelly Pro 2PM: ₪549, and Pro 4PM for four circuits: ₪649.
• 3-phase: Shelly Pro 3: ₪499.

No subscription fees. One device in the panel replaces several mechanical Shabbat timers.

Beyond Shabbat

The same device works every day of the week: turning the water heater off automatically, switching on outdoor lights at sunset, or remote control from your phone. Installation in the panel and in wall boxes is done by an electrician, and you can book an electrician who knows Shelly products. Not sure what fits each point? Talk to us and we'll build a list for you.