Solar and EV lab · Level 5 of 8
Battery dispatch: cut the bill under a time-of-use tariff
Level 5 of 8 in the Solar and EV lab: a free solar and EV exercise at Advanced level. Set the battery rules (mode, grid charging window, target and reserve) so a home with solar pays as little as possible under a cheap-night, dear-evening tariff.
Free · no download. Your work is saved on this device. Updated 18 Oct 2026.
The brief
- Client
- Penrose Family Home
- Site
- Semi-detached house, Penrose Road
- Work order
- WO-SEV-105
- Task code
- SEV-05
- Difficulty
- Advanced
- Type of work
- Design
Set the battery rules (mode, grid charging window, target and reserve) so a home with solar pays as little as possible under a cheap-night, dear-evening tariff.
Skills you practise
- Battery dispatch
- Time-of-use tariffs
- State of charge
- Reserve for a power cut
What the test checks
The acceptance test marks the skills this level practises.
- Battery dispatch
- Time-of-use tariffs
- State of charge
- Reserve for a power cut
In this lab
- Strings, protection and the day's generation
- Battery rules under a tariff
- Charger faults and load management
Levels in the Solar and EV lab
Previous: Generation against load: size the array for self-consumptionNext: Commission the system: the safe energising order
- Site survey: name every part and every isolation point
- String sizing for the coldest and hottest day
- Select cables, fuses, isolators and surge protectors
- Generation against load: size the array for self-consumption
- Battery dispatch: cut the bill under a time-of-use tariff
- Commission the system: the safe energising order
- EV charger fault: a car will not charge
- Load management: three chargers on a limited supply
Part of the Solar and EV lab
Size a solar array, set a battery and fault-find an EV charger on a commercial site.
Feeds these internships: Electrical Design, Electrical and Solar Energy Systems.