Box · planned price
€149 once
Automatic local control, live local dashboard, history, and manual updates. No account required.
Every night, one decision. Every decision, on the record.
A quiet box beside your inverter learns the home, checks tomorrow’s sun, and charges the battery only as much as you need.
Decision record · 23:30
Forecast12.9 kWh
Learned home load38.9 kWh
Reserve20 %
Tonight’s target
90%
Tomorrow’s forecast covers 9.7 kWh of the 38.9 kWh used by day. Charging to 90 % tonight covers the gap plus a 20 % reserve.
EBB · 01
Pay less
Estimated €20–65 / month
depending on use, season, and available solar
Protect the battery
Estimated 5–15 %
longer service life with less time at 100 %
Set and forget
10-minute setup
with every decision made locally
The day of the box
Quietly watching. Deciding once. Checking its work.
The box follows the same bounded sequence every day, even when the internet is unavailable.
06:00
Capture
Reads the meter as the cheap-rate window closes.
All day
Observe
Watches solar, home load, battery, and the forecast.
23:30
Decide
Learns today’s load, derates tomorrow’s sun, and sets one target.
00:15
Verify
Checks the inverter accepted the target and retries once if needed.
Estimated savings
Use tomorrow’s sun before buying tonight’s energy.
A day/night tariff creates the first saving. Forecast-aware charging avoids buying energy that tomorrow’s PV can supply.
Planning range
€20–65 / month
Estimated for 0.5–2 MWh monthly consumption using Bulgarian 2026 day/night rates. Your result depends on load, tariff, battery, and season.
Calculate your estimate100 %
Fixed
75 %
Forecast-aware
Battery life
Less time waiting at 100 %.
Charging to what tomorrow needs keeps LFP cells away from the high-SOC stress zone for longer. The planning estimate is 5–15 % longer service life, not a warranty prediction.
The estimate is based on observed throughput and published LFP degradation research. Read the estimate method. Read the sources: Applied Sciences, Energies, and Journal of Energy Storage.
Safety boundary
It changes one number.
The overnight charge target. It never changes charge current, discharge floor, battery type, or your tariff schedule.
- Inverter online
- No battery fault or alarm
- Time-of-use mode confirmed
- Grid charge window unchanged
- Target register readable
- New target read back and verified
Compatibility
Deye first. Connected through Solarman.
The first release reads and controls supported Deye hybrid inverters over the logger already on your network. Sunsynk and more connection paths follow.
Deye · supported firstSolarman · local networkSunsynk · testingModbus · planned
Check compatibilityLocal by design
No cloud needed to protect the battery.
Forecast, learning, decision, safety checks, and the audit record all live on the box. The optional console adds remote history and fleet tools; it does not sit in the control loop.
Choose your level
The box works on its own. Plus adds the distance.
Plus · planned price
€3.90 / month
Remote console, longer history, alerts, automatic signed updates, and improved forecast models.
From a real home
Thirty days in Sofia, on the record.
Measured from the founder’s home between 15 September and 15 October 2026. The forecast-aware layer is still provisional; the tariff-shift value is measured from recorded energy flows.
| Home load | 1,819 kWh |
|---|---|
| PV production | 570 kWh |
| Grid import | 1,407 kWh |
| Battery discharge | 902 kWh |
| Measured tariff-shift value | ≈ €54 / month |