How to read this page
This page asks what single uniform rateOne cost of capital applied to every country and technology alike. would make the cheapest plan cost what the plan at country ratesThe estimated 2025 rates: a cost of capital for each country and technology, so a solar farm in one country can cost more to finance than in another. costs. The papers solve the uniform armThe plan solved at one uniform rate, the comparator a planner who ignores finance differences would build. at a series of rates, and the line through those solved plans is the frontierThe system cost of plans solved at a series of uniform rates, showing how cost rises with the level of the cost of capital.. Where it reaches the treated armThe plan solved at country rates, each country and technology financed at its own estimated cost of capital.'s cost is r*The uniform rate at which a uniformly financed plan costs as much as the plan at country rates., the country rates' cost expressed as one uniform rate.
The slider moves one uniform rate. It reads the frontier at that rate and works out what the plan you chose below would cost if every country and technology were financed at it. Between two solved rates the frontier is drawn as a straight line, since nothing between them was solved.
The repricing panel holds a planOne solution of the model: what it builds, where, and how it runs, under one set of assumptions. fixed, what it builds, where and how it runs, and works out what it would cost at other rates. That's repricingWorking out what a fixed plan would cost at a different set of rates, without changing what it builds or how it runs., the one calculation this site makes itself. Each row's capital chargeThe yearly payment that recovers a plant's upfront cost over its life at the cost of capital, like a mortgage payment. is recomputed with the model's own formula, interest during constructionInterest that builds up on money spent before a plant starts earning, adding to its cost. and fixed operating costsWhat a plant costs each year to keep available, staff and maintenance, whether or not it runs. included, and the result reproduces every repriced figure the papers print.