Energy calculators.
Estimate electrical demand, consumption, solar capacity and battery backup with visible engineering assumptions.
Energy
Estimate electrical demand, consumption, solar capacity and battery backup with visible engineering assumptions.
Electrical load calculator
Estimate connected load, likely peak demand and current from appliance power and diversity.
- Connected vs peak load
- 230 V current estimate
- Editable concurrency
Electricity consumption calculator
Convert appliance watts and operating hours into daily or monthly kWh and an energy-charge estimate.
- kWh estimate
- Daily or monthly period
- Editable tariff
Solar system size calculator
Estimate an indicative solar array and panel count from daily energy, sun hours and system losses.
- Loss-adjusted sizing
- Panel count
- Roof-area screen
Battery backup calculator
Estimate nominal battery kWh and amp-hours from backup load, duration, voltage and usable capacity.
- kWh and Ah
- Depth of discharge
- Efficiency allowance
Solar generation calculator
Estimate solar energy production over a chosen period with conservative, expected and optimistic resource cases.
- Period generation
- Three visible scenarios
- Capacity-factor screen
Solar cost, savings and payback calculator
Model solar upfront cost, self-use savings, export credit, payback and NPV across three generation scenarios.
- Simple payback
- NPV and lifetime benefit
- Three generation scenarios
Reverse solar sizing calculator
Work backwards from monthly kWh or a variable energy charge to an indicative solar array and panel count.
- kWh or bill target
- Reverse calculation
- Scenario panel counts
Grid electricity versus solar calculator
Compare discounted grid-only electricity cost with a solar case including imports, exports, CAPEX and operating cost.
- Discounted cost comparison
- Self-use and exports
- Three solar scenarios
Battery versus generator calculator
Compare discounted battery and generator backup costs for equal load and service hours across three usage cases.
- Discounted TCO
- Replacement and fuel escalation
- Three service-hour scenarios
Start with demand before sizing equipment
Electrical load estimates power needed at one moment, and energy consumption turns operating time into kWh. Use solar sizing for a daily-load estimate, reverse solar sizing for a bill or energy target, then check location-based generation before comparing costs.
Keep engineering assumptions visible
Generation, payback and grid comparisons keep solar resource, losses, self-use, export credit, tariff growth and degradation visible across conservative, expected and optimistic cases. Battery versus generator compares equal backup service, while final circuits, structures, inverters and batteries still need qualified local design.