Make your assumptions visible.
Explore an annual electricity balance and indicative storage duration. Change the inputs, then download your scenario brief.
Calculated in your browser. No inputs are sent to us.
Formulas & boundaries
Demand after efficiency = demand × (1 − improvement ÷ 100). Gross solar = capacity × yield. Direct solar use = minimum of gross solar × self-use ÷ 100 and demand after efficiency. Grid imports = remaining demand. Annual avoided import cost = (starting demand − imports) × import price. Indicative location-based emissions difference = avoided imports × grid factor ÷ 1,000 tonnes.
Storage duration = nameplate energy × usable fraction ÷ critical load. This is a theoretical upper bound before conversion losses, reserve policy, degradation and equipment limits. Battery power rating is not modelled; no backup capability is established. Storage is not included in annual solar self-use or cost calculations.
No hourly matching, export revenue, demand charges, taxes, capital costs, maintenance, financing or return on investment is modelled. The emissions proxy is not a certified carbon inventory and does not assess renewable certificates or lifecycle impacts.