HTHOMETALLYTHE PRACTICAL HOME GUIDE

Independent energy/ CALCULATOR

Solar array energy balance

Estimate DC array size from daily energy and a monthly solar assumption.

Use the essential-load budget for an outage scenario.
Location- and month-specific equivalent full-sun hours.
Assumed losses; adjust to the modelled system.
Use the DC nameplate rating of the exact module being considered.
Use module dimensions only; installation clearances and access need additional area.
Indicative required array

2.56 kW DC

Minimum whole panels

6 panels

Selected-panel array rating

2.70 kW DC

Module surface area

12.6 m²

Interpretation:The energy estimate rounds up to 6 selected panels, rated 2.7 kW DC and occupying 12.6 m² of module surface. Confirm roof layout, structure and inverter limits separately.

First-pass average energy balance only. Panel count rounds upward. Module area excludes gaps, setbacks, access, mounting and unsuitable roof zones. No weather-sequence simulation, battery recovery allowance, inverter sizing, structural check or reliability guarantee. Yield factor is a user assumption, not a product rating.

Continue your calculation

Independent energy

Daily electricity budget

Add three appliance groups using power and actual daily running time.

Independent energy

Battery autonomy

Convert a daily load into nominal battery capacity with stated losses.

Independent energy

Battery autonomy after load shedding

Compare battery runtime before and after reducing the daily critical-load budget.