Deye Inverter Time-of-Use (TOU) Settings — Battery Scheduling Guide

Time-of-use (TOU) programming tells your Deye hybrid inverter when to charge batteries and when to discharge them. In Dubai the payoff is not tariff arbitrage — DEWA does not publish peak/off-peak prices — it is self-consumption: storing your midday solar surplus and using it after sunset, so you buy fewer kilowatt-hours from the grid. This guide explains what scheduling realistically achieves on DEWA's tariff, how to set it up, and how the same feature works in markets that do have real time-of-use pricing.

What Scheduling Can (and Can't) Do on a DEWA Tariff

DEWA's residential electricity tariff is consumption-slab based: your fils-per-kWh rate depends on how much you consume in the month (plus a fuel surcharge), not on the time of day. There are no published time-of-use price bands — so there is no "cheap night power" to buy or "expensive evening power" to avoid. What a battery schedule genuinely delivers on a slab tariff:

• Higher self-consumption: charge from surplus solar at midday and discharge into your evening load — every stored kWh you use after sunset is a kWh you don't buy from the grid at your slab rate
• Possibly a lower slab: because slab rates step up with monthly consumption, cutting grid purchases can, depending on your usage, keep more of your consumption in a cheaper slab
• Backup reserve: a minimum state-of-charge (SOC) keeps energy in the battery for unexpected outages
• Lower evening grid draw: the household demand peak (AC, cooking, lighting after sunset) is served from stored solar instead of the grid

A Sensible Schedule for Solar Households

The windows below follow typical Gulf solar production and household demand — they are a starting point, not tariff periods. Adjust them to your own generation and consumption pattern.

Setting Up Scheduling on Your Deye Inverter

Menu names and locations vary by inverter model, firmware version, and monitoring app — the paths below are typical, but always confirm against the manual for your specific model.

Via the Monitoring App

1. Open the app paired with your inverter (SolarMan Smart or Deye Cloud, depending on your logger) and select your inverter
2. Find the work-mode settings — on many models this is under Settings > Work Mode > Time of Use
3. Enable the TOU/scheduling mode
4. Set up to 6 time periods, choosing per period: charge from solar, charge from grid, discharge to load, or hold
5. Set a minimum SOC reserve (we recommend 20% for emergency backup)
6. Save and verify the schedule takes effect over the next day

Via the Inverter Display

Most Deye hybrids expose the same schedule on the built-in display, typically under the system or work-mode settings menu. The exact button sequence differs between models and firmware revisions — the installation manual for your model documents it.

If Your Utility Has Real Time-of-Use Pricing

Many markets we serve — including much of Europe, South Africa, and Australia — do have genuine TOU tariffs with published band times and prices. There, the same Deye schedule screen performs real tariff arbitrage: set grid-charge windows inside your utility's published cheap hours and discharge windows inside the expensive ones. Use the band times printed on your own tariff document — they differ by utility, season, and plan.

Advanced Tips

• Seasonal adjustment: In summer (longer solar hours), set the charge window earlier and extend the discharge window
• Weekend mode: If home during weekdays, you may want to discharge batteries earlier for daytime AC usage
• Generator integration: If you have a backup generator, set the inverter to avoid discharging below 30% SOC to allow the generator to take over during extended outages

How Much Can You Save?

There is no universal number, and be wary of any article that promises one. On a slab tariff, your saving is simply the grid kWh you displace with stored solar multiplied by your own rate — it depends on your evening consumption, battery capacity, and round-trip losses. A rough estimate: multiply the kWh your battery discharges into the house each evening by your slab rate. In genuine TOU markets, add the spread between your utility's peak and off-peak band prices for every shifted kWh.