What circulates online about charging economics is mostly hand-waving. When the question is your own community, your own bays and your own budget, you need arithmetic, not adjectives. These are the three questions we are asked most on real projects, turned into tools: enter your own numbers, get results immediately, no phone number demanded first.
The three tools
| Tool | Answers | Open |
|---|---|---|
| Investment & payback | One-off investment, monthly net, property share, static payback - with a utilisation sensitivity table | Start → |
| Shelter cost estimator | Cost split into six components by area, structure, foundation and fire tier | Start → |
| Cooperation model comparison | Self-operate vs revenue share vs joint investment, on outlay, annual net and return | Start → |
Pair them with the anonymised case studies - seven project types with real scale, duration and difficulty - and the FAQ for the policy questions.
Why we publish our arithmetic
Honestly, opening the formulas is not pure charity - these numbers used to be something you got across a table. But most projects die not on price; they die because the account was never made explicit. The committee asks why so many ports, the property asks when it pays back, the investor asks who carries the risk - and if any answer lacks a number, the meeting ends. The tools fix that: the person with the doubt runs the numbers, and either the account holds - and conversations get much cheaper - or it does not, and everyone just saved months. We genuinely prefer not to take on a project that will not survive its own arithmetic.
Where the numbers come from
- Transparent formulas - each tool states its math on the page; check it with a pocket calculator if you like.
- Defaults from public industry mid-ranges - not Dongshang quotes, not promises.
- Every parameter editable - got a competitor's quote? Type their unit prices in and compare directly.
- Static estimates - no cost of capital, taxes, insurance, renewals or contingency inside; treat results as directional.
- The survey decides - capacity, routing and reinforcement are facts only the site can confirm; the free survey is where the real quote comes from.
After the calculator
The tools settle whether it is worth doing; the survey settles how. Our engineers arrive with clamp meters, log the three-phase load for seven days, trace existing trays and conduits, and conclude: reinforce or shift peaks. The survey is free; the quotation is one fixed price with no add-ons. Call +86 133-9535-8768 or email vip@ddner.cn.
About these results: the tools compute ideal-condition, static estimates from public industry parameters and the values you enter, for early communication, option comparison and feasibility screening only. They are not investment advice, not a promise of return, not a quotation. Actual investment, revenue and payback depend on site conditions, grid capacity, equipment selection, real utilisation, tariff and service-fee policy, O&M quality and sharing terms, and may differ substantially. Entrepreneurship involves risk; decisions should rest on survey data, formal contracts and real operations. The company accepts no investment risk for decisions made on these figures.