Inverter Running Load Sizing Worksheet

WHATSON / SOLAR & BATTERY

Inverter Running Load Sizing Worksheet

Compare simultaneous running loads with an entered headroom allowance.

Starting values are editable examples. Enter your own loads, datasheet values and site assumptions.

1 Sizing allowance
Simultaneous running loads
Solar & Battery

An inverter needs to handle the loads running together, with separate attention to starting demand and equipment ratings.

List the simultaneous running appliances and choose a headroom allowance. Read watts and VA without assuming one replaces the other.

01 / GET STARTED

How to use Inverter Running Load Sizing Worksheet

  1. Enter running power allowance.
  2. Add the entries in simultaneous running loads as separate rows. Include appliance, quantity, running power and power factor for each row.
  3. Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
02 / A CLEARER WORKFLOW

Why choose this tool?

A visible load schedule provides a clearer sizing discussion than relying on a single appliance name or battery capacity.

Before you use the result

Assumes all entered loads run together. VA totals are conservative scalar sums. Check actual inverter W, VA, surge duration, temperature derating and manufacturer requirements separately.

03 / COMMON QUESTIONS

Questions about Inverter Running Load Sizing Worksheet

Does the worksheet approve an inverter model?

No. Check running ratings, surge duration, temperature derating and manufacturer requirements independently.

What should I check before using Inverter Running Load Sizing Worksheet?

Check Running power allowance, Appliance, Quantity and Running power. Use the exact units shown beside the controls and replace any example values with your own inputs.

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