Essential Backup Load Planner
Essential Backup Load Planner
Choose outage hours for essential appliances and calculate an AC energy budget.
Backup planning is often about a few essential appliances during an outage, rather than the whole home's daily energy.
Enter only the loads you intend to support and their outage operating hours. Compare the energy budget before choosing storage capacity.
How to use Essential Backup Load Planner
- Enter extra energy allowance.
- Add the entries in essential loads during the outage as separate rows. Include appliance, quantity, running power per unit, daily operating time and duty factor for each row.
- Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
Why choose this tool?
A dedicated outage schedule helps keep optional daytime consumption out of the essential backup calculation.
Before you use the result
Hours refer to the outage, not necessarily a full day. Connected power is not an inverter surge rating.
Questions about Essential Backup Load Planner
Are the hours a full day assumption?
Not necessarily. They refer to the outage period you enter. Use the expected running hours within that period.
What should I check before using Essential Backup Load Planner?
Check Extra energy allowance, Appliance, Quantity and Running power per unit. Use the exact units shown beside the controls and replace any example values with your own inputs.
Related Tools
Explore the other tools in this collection.
Battery Backup Runtime Calculator
Estimate steady AC backup hours from battery energy and an entered load.
Open toolBattery Bank Series and Parallel Calculator
Inspect ideal bank voltage, amp hours and energy from identical battery modules.
Open toolBattery Charging Time Estimator
Estimate ideal bulk equivalent charging time from a state of charge change.
Open toolBattery Energy Unit Converter
Convert between voltage and Ah, Wh, kWh and electricity units.
Open toolBattery Option Comparison Worksheet
Compare entered purchase costs per usable cycle and throughput energy.
Open toolCharge Current and C Rate Calculator
Compare entered charge current with capacity and a manufacturer supplied current limit.
Open toolCold Temperature Voc Calculator
Apply a signed module voltage coefficient to a colder module temperature.
Open toolDC Cable Voltage Drop Calculator
Estimate resistive DC drop in a two conductor circuit from an entered conductor area.
Open toolHome Energy Load Planner
Build an appliance schedule and separate daily energy from connected running power.
Open toolHot Temperature Vmp Calculator
Inspect the operating voltage reduction under an entered hot cell condition.
Open toolInverter Running Load Sizing Worksheet
Compare simultaneous running loads with an entered headroom allowance.
Open toolMonthly Solar Yield Planner
Supply your own monthly sun hours and day counts for a seasonal production worksheet.
Open toolMotor Starting Load Worksheet
Combine one starting appliance with other loads already running.
Open toolMPPT Output Current Worksheet
Estimate battery side controller current from an array power allowance.
Open toolOff Grid Energy and Storage Balance
Estimate array and nominal storage for a daily AC demand and autonomy allowance.
Open toolPV Series and Parallel Array Calculator
Calculate ideal voltage, current and nameplate power for identical modules.
Open toolPV String Limit Checker
Compare a proposed series string against entered cold Voc and hot Vmp limits.
Open toolRequired Battery Capacity Calculator
Work backwards from a backup load and duration to nominal battery capacity.
Open toolRoof Panel Footprint Planner
Fit modules into an entered rectangular usable area in two orientations.
Open toolSolar Array Size Calculator
Estimate DC capacity from a daily AC energy target and entered sun hours.
Open toolSolar Generation Estimator
Estimate AC energy after separate DC losses and inverter efficiency.
Open toolSolar Installation Quote Builder
Total a manually priced bill of materials in PKR without fetching market rates.
Open toolSolar Lifetime Cashflow Worksheet
Model annual savings, degradation, maintenance and a one time replacement.
Open toolSolar Loss Chain Calculator
Multiply successive loss factors and see how each stage changes energy.
Open toolSolar Output Degradation Planner
Track an entered first year yield under a constant annual reduction.
Open toolSolar Panel Quantity Calculator
Round a target array up to whole panels and inspect the resulting DC capacity.
Open toolSolar Self Consumption and Export Savings Calculator
Value entered solar use and exports without assuming a current utility tariff.
Open toolSolar Simple Payback Calculator
Compare an entered capital outlay with annual net savings.
Open toolTilted Panel Row Spacing Calculator
Calculate simple geometric shadow clearance for an entered solar elevation angle.
Open toolUsable Battery Energy Calculator
Separate nominal stored energy, usable DC energy and estimated AC output.
Open toolWatts, VA and Power Factor Converter
Convert real and apparent single phase power using the entered power factor.
Open tool
