Daily Energy Load & Appliance Audit

Tally daily Watt-Hours and Amp-Hours with true inverter efficiency losses.

System DC Bus Voltage Higher bus voltage reduces wire thickness and current.

Inverter AC Efficiency Covers DC-to-AC conversion loss and heat overhead.

Quick Presets:

Appliance / Circuit Watts Hrs/Day Qty Power

DAILY ENERGY DEMAND

784 Wh / day

Equivalent to 65.3 Ah at selected DC bus voltage.

Appliance Net Wh

720 Wh

Raw device draw

Inverter Conversion Loss

64 Wh

Lost as heat

Peak Simultaneous Load

130 W

Max concurrent demand

Audited Circuits

Appliance lines

Battery Storage: Your 2-day autonomy bank needs ~65.3 × 2 ÷ 0.80 = 163 Ah in LiFePO4.
Transfer calculation: Send load to Battery Sizer →
Solar PV: Requires ~220W–300W of solar panels to replenish this load daily.

Engineering Scope & Formulas

Handles AC and DC loads across 12V, 24V, and 48V battery architectures. Applies realistic inverter conversion loss (80%–95%).

Daily Wh = ∑ (Watts × Hours/day × Qty) ÷ Inverter Efficiency; Daily Ah = Total Daily Wh ÷ System Voltage

Deep dive into the electrical theory, wire gauge charts, and thermal derating behind this calculator in our field guide:
Read the complete guide →