Concrete Calculator
Estimate volume and bag count for a rectangular slab.
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Solar Panels & Battery Scenario
Convert a daily energy goal into illustrative panel and storage quantities.
02EXAMPLE RESULT
Illustrative panel count
16
Required DC nameplate capacity6.250kW
Rounded array nameplate capacity6.400kW
Nominal battery storage27.778kWh
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How this calculation works
Peak sun hours and losses are your scenario inputs, not a location forecast. The loss input includes production-side losses; storage delivery efficiency applies separately to battery sizing. This is daily energy arithmetic: it does not size instantaneous power, structural loading, wiring, inverter surge, permits, seasonal reliability or an installable system.
DC kW = daily kWh / (peak sun hours × (1 − loss)). Panels = ceiling(DC kW × 1000 / panel W). Nominal storage = daily kWh × autonomy / (usable share × delivery efficiency).
Your calculation, step by step
- Convert the daily target into DC power using the entered sunlight and loss assumptions.
- Round panel quantity up.
- Size illustrative storage separately for usable capacity and delivery losses.
A worked example
20 kWh/day, 4 peak sun hours and 20% production loss require 6.25 kW DC, rounded up to 16 panels rated at 400 W.
Work through an example.
Inspect the assumptions and limits before applying a result.