Step 1
Settings
Step 3
Solar, battery, and inverter estimate
Suggested inverter continuous rating
0 W
Peak running load x headroom
Minimum surge support
0 W
Sum of included surge watts
Battery storage required
0 Wh
0 Ah at selected voltage
Solar array size
0 W
0.00 kW DC
Panels needed
0
0 kWh/day estimated production
Step 2
Load builder
Add appliances from the starter library or create custom rows. All calculations happen in your browser.
| Use | Category | Appliance | Qty | Watts | Surge W | Hours/day | Days/week | Running W | Wh/day | kWh/month | Cost/month | Notes | Action |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Totals | 0 W | 0 Wh | 0.00 | GBP 0.00 | |||||||||
Analysis
Top energy consumers
Notes
Formula reference
Daily kWh = watts x hours per day x quantity x days per week / 7 / 1000.
Monthly cost = monthly kWh x electricity rate.
Solar array watts = daily Wh / peak sun hours / solar efficiency.
Battery Wh = daily Wh x autonomy days / inverter efficiency / battery depth of discharge.
Starter wattages are rough defaults. For best results, use each appliance label, manual, smart plug, or watt meter.