PELS

Getting Started ​

PELS is the Homey app that takes your heavy electrical loads off your hands. It keeps your power usage inside your hourly limit, decides which devices to turn down first, plans Smart tasks around deadlines, and shifts flexible load into cheaper hours — automatically, every hour.

In practice, most users spend their time in Apps -> PELS -> Settings and a small number of Homey Flows.

If PELS is not installed yet, get it from the Homey App Store.

Diagram showing whole-home power data flowing into PELS, PELS applying hard cap, priorities, prices, modes and Smart tasks, and then managing EV charging, hot water, heating and ventilation.
PELS sits between whole-home power data and managed devices. It uses your hard cap, priorities, prices, modes and Smart tasks to decide what should run, pause or resume.

Before you begin ​

  • PELS must already be installed on your Homey Pro.
  • You need a whole-home power meter paired with Homey (e.g. Tibber Pulse, AMS/HAN reader, P1 reader, Shelly EM) or another Flow source that can report current load in watts.
  • You should know which devices in your home use the most power and can tolerate being turned down temporarily.

Open PELS settings ​

Open Apps -> PELS -> Settings in Homey. This is where all configuration happens.

Step 1: Connect your power meter ​

Live power input is what PELS plans on — connect it once and every other feature unlocks.

Easiest path — use your power meter. If your power meter is marked Tracks total home energy consumption in Homey and it is the only whole-home meter Homey lists, PELS starts reading it on its own shortly after starting, unless it has ever received readings from a Flow. No Flow and nothing to pick. This works for Tibber Pulse, P1/HAN readers, Shelly EM, and similar. If you have several meters, or you chose the Flow source earlier, go to Settings > Limits & safety, set Power source to Power meter, and pick the meter under Whole-home meter.

See Using Homey Energy for the full walkthrough, including how to also read electricity prices from Homey Energy (especially useful outside Norway).

Alternative — feed power via Flow. If your meter is not in Homey Energy, or you want to combine sources before sending the value to PELS, create a Homey Flow that calls the Report power usage action whenever your meter updates. Input is current power in watts.

Once power data is flowing, the Overview page starts showing real data.

Step 2: Set your capacity limit ​

Go to Settings > Limits & safety and configure:

  • Capacity period — choose Hourly average for hourly tariffs, or 15-minute average (Belgium) when your Belgian grid tariff measures quarter-hour peaks.
  • Hard cap (kW) — the average power level you do not want the selected period to exceed. Set this to match the peak or tariff step you want PELS to protect, for example 5 kW or 8 kW.
  • Safety margin (kW) — a buffer below the hard cap. PELS starts turning things down before you actually hit the limit. A margin of 0.3-0.5 kW is a reasonable starting point.

With the Belgian period selected, a 5 kW hard cap gives each quarter a 1.25 kWh allowance. The page also reports the highest fully tracked quarter-hour average in the current month. This is a control aid based on the readings PELS received; your grid operator may apply a minimum peak or combine monthly peaks when calculating the bill.

PELS Settings Limits and safety page showing hard cap, safety margin and power source controls.
Limits & safety is where you choose the capacity period, power source, hard cap and safety margin.

TIP

Enable Simulation mode in Settings > Simulation mode while you are getting started. PELS will calculate what it would do without actually controlling any devices. This lets you verify the setup is sensible before giving PELS real control.

Step 3: Choose which devices PELS controls ​

Go to Settings > Devices. For each device you want PELS to manage, configure:

ControlWhat it means
ManagedPELS includes the device in its planning. Unmanaged devices are treated as background load.
LimitPELS is allowed to lower or turn this device off to stay within your hard cap.
PricePELS adjusts this device's temperature targets based on electricity prices (only relevant for temperature devices).

Good first candidates are water heaters, floor heating, panel heaters, and ventilation — devices that use a lot of power but can tolerate being turned down for a while.

PELS Settings Devices page showing EV charger, heater and thermostat devices with Managed, Limit and Price controls.
Devices is where each load is marked as managed, can be limited to stay under the hard cap, adjusted by price, or left as background usage.

Step 4: Set up modes, priorities, and targets ​

Modes are the core of how PELS decides what to do. Each mode stores a separate set of priorities and target temperatures for your devices. Go to Settings > Modes to configure them.

Create your modes ​

Common modes are Home, Night, and Away. Think of them as profiles for different situations:

  • Home — normal daytime comfort
  • Night — keep bedrooms warm, lower priority on other heating
  • Away — reduce everything to minimum acceptable levels

Set priorities and target temperatures ​

For each device in each mode, you configure two things:

  • Priority — a number where lower means more important. When PELS needs to turn things down, it starts with the highest-numbered (least important) devices and works its way up. When there is room again, it resumes devices in the opposite order.
  • Desired temperature — the target temperature PELS will set for this device in this mode (for temperature devices).
PELS Settings Modes page showing Home mode priorities and target temperatures for managed devices.
Modes is where priorities and comfort targets differ between Home, Away and Night.

For example, in Night mode you might set:

  • Bedroom heater: priority 1, target 20 °C — stays on as long as possible
  • Living room heater: priority 2, target 18 °C — turned down before the bedroom
  • Water heater: priority 3 — limited first if needed

Switch modes with Flows ​

Modes only take effect when activated. Create Flows to switch modes automatically:

  • Time-based: Set mode to Night at 23:00, Home at 07:00
  • Presence-based: Set mode to Away when everyone leaves, Home when someone arrives
  • Manual: Use a virtual button or the Homey app to switch modes on demand

Use the Set operating mode Flow action card to change the active mode.

Re-sending the current mode is also a simple way to reapply targets if a device has drifted from its target temperature.

Step 5: Add price optimization (optional) ​

If you want PELS to shift heating to cheaper hours, go to Settings > Electricity prices:

  1. Choose your price source — Norway (spot + grid tariff) if you are in Norway, or Homey Energy / Flow tag for other sources.
  2. Make sure the price status shows that data is available.
  3. If using the Norway source, select your county, grid company, and tariff group.

Then go to Settings > Devices, open each temperature device that should participate, and enable Price or Setup > Price-based control. Water heaters and floor heating are the highest-impact picks — they carry the thermal mass that makes shifting pay off.

After at least one device has price response enabled, use Settings > Price-aware devices to turn Respond to prices on or off globally and set per-device temperature adjustments:

  • Cheap-price boost (°C) — temperature boost while power is cheap, for example +2 °C.
  • Expensive-price reduction (°C) — temperature reduction while power is expensive, for example -2 °C.

Step 6: Add Smart tasks (optional) ​

Use Smart tasks when one device must reach a target by a specific time. For example:

  • charge an EV to 80% by 07:00
  • heat a room to 21 °C by 06:30
  • heat a water heater before a busy morning

Smart tasks are created with Homey Flow action cards such as Add charging task and Add heating task. See Smart Tasks for the full guide.

For dashboard-driven setup, pin the New smart task widget. It lets you pick a managed device, preview the ready-by window, and create a one-off task. The Smart tasks widget then shows active task status, and Held-back devices can offer Let it run now for a device PELS is holding back.

Quick setup checklist ​

Once you have worked through the steps above, verify:

  1. Your power meter Flow is running and the Overview shows current usage.
  2. A hard cap and safety margin are set in Settings > Limits & safety.
  3. At least a few devices are marked as Managed and have Limit enabled.
  4. You have at least one mode with sensible priorities and targets.
  5. You have Flows to switch between modes.
  6. Optional Smart task Flows are configured for devices that need a target by a ready-by time.
  7. Simulation mode is disabled when you are ready for PELS to take real control.

Terminology and units ​

  • Power is instantaneous load, measured in W or kW.
  • Energy is usage over time, measured in kWh.
  • Hard cap — your maximum average power for the selected capacity period, in kW.
  • Safety margin — a buffer below the hard cap where PELS starts reacting, in kW.
  • Available power — how much more load PELS can fit right now before it reaches the current safe pace, in kW.
  • Daily budget — an optional soft guide for total energy in a day, in kWh. Used to spend less by shifting load into cheap hours or to hold the home under a daily energy ceiling; it never overrides the selected-period hard cap. See Daily Energy Budget.

For the full vocabulary, see the Glossary.

Built for Homey Pro users who need tighter control over large loads.

Copyright (c) Ole Markus With