Electrics
Calculators
Cable size calculator
Example: Smallest size that passes: 6 mm² (indicative)
EV charger load calculator
Example: Needs load management or a DNO check (total 77.2 A on a 60 A fuse)
- Insulation and ventilation
Extractor fan size calculator
Example: Fan: at least 15 l/s (54 m³/h)
Maximum demand and diversity calculator
Example: Maximum demand: about 70.6 A after diversity (indicative)
Voltage drop calculator
Example: Voltage drop: 9.00 V (3.91%)
Amps, kW and kVA converter
Example: 32.00 A = 7.36 kW = 7.36 kVA
Consumer unit and RCBO planner
Example: 16 modules needed (indicative)
Max Zs and expected Zs calculator
Example: Expected Zs: 1.05 Ω (indicative)
Solar PV system size calculator
Example: 10 panels, 4.30 kWp: about 3,655 kWh a year (indicative)
Appliance running cost calculator
Example: 6.00 kWh a day, 2190.0 kWh over 365 days
Home battery size calculator
Example: Battery: about 5.33 kWh nominal (4.80 kWh usable)
Project estimators
EV charger plan
Check your supply before an EV charger: maximum demand, charger load, cable size and volt drop, as a brief for your electrician.
Garden room estimator
Plan a garden room: base, stud walls, insulation to a U-value, flat roof and a supply check. Costs only from your own prices.