Case study · GorkyCAD Pro
Electrical project for a 150 m² house with solar
A country house with solar: TN-C-S supply, 24 groups across three phases, 6 kWp of solar panels and an EV charger.
📊 Project specifications
| Type House | Area 150 m² |
| Phases Three-phase (380 V) | Calculated load 18 kW |
| Groups 24 | Solar 6 kWp |
| EV charger 7 kW | Design time 3 evenings |
🎯 Task
Design power supply for a country house: TN-C-S input, distribute 24 groups across phases, integrate solar panels with a hybrid inverter and an EV charger.
💡 Solution
Load calculation with demand factors, phase balancing to 8/8/8 groups. Solar inverter with battery on a dedicated circuit, EV charger with load management. Input panel with fire RCD 300 mA and SPD Type 2.
- Load calculation with demand factors and balanced phases (8/8/8 groups).
- Hybrid solar inverter with battery on a dedicated circuit.
- EV charger with load management; input panel with 300 mA fire RCD and Type 2 SPD.
- PDF set (SLD, layout plan, specification, cable schedule, panel passport) for the network owner.
✅ Result
The project is ready for the network organization and installation: SLD, layout plan, specification, cable schedule, panel passport with QR. The solar metering node is coordinated with the network owner.
FAQ
How to integrate solar panels into a house project?
The hybrid inverter and batteries go on a dedicated circuit, and the metering node is coordinated with the network owner — GorkyCAD keeps it all in one project.
How are 24 groups split across three phases?
Evenly, with demand factors per phase — e.g. 8/8/8 — so no phase is overloaded.
Can I design without experience?
Yes, GorkyCAD Pro calculates loads, cables and breakers automatically per regulations.
Create a project like this for free
Frequently asked questions
Yes, all articles and calculators are completely free.
The site offers 21 free calculators: cable sizing, breakers, RCD, voltage drop and more.
In GorkyCAD Pro: plans, panels, calculations and a PDF set for free.
Write to hello@gorkycad.pro — specialists will review and correct it.