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Alpha Water & Power

AWP Labs · Power

Large-Load Power Planner

Plan power for a data center or other large load. Build a phased demand profile or upload interval data, add grid and generation supply, size and outage-test a battery (BESS) and compare saved scenarios. Preliminary: assumptions shown, engineering review required.

Planning workspace. Your project stays in this browser and uploads are processed locally. Preliminary model v2.0. No equipment is connected.

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Example project · ready to analyze

01 / Project

Start with your project.

Editable inputs

Load profile

Bring the demand into focus.

Load profile source

Facility demand = IT demand × PUE × the hourly shape.

Development phases

Phases run one after another, up to 12 phases and 366 days in all. Each phase's grid and generation values replace the default supply inputs.

Edit the 24-hour demand shape

Percent of each phase's IT nameplate load, repeated every day. Set every hour to 100 for a constant full-load study.

Hourly load, percent of IT nameplate
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168 intervals · 60 min · 168 hours · peak 100 MW · 12,880 MWh facility demand. A synthetic profile: replace these assumptions with project data.
How this is calculated

Interval balance. At every interval, Generation = min(required load, available generation), then Grid = min(grid ceiling, remaining load), then Battery = min(remaining deficit, discharge rating, energy above the reserve). Whatever is left is unserved demand.

Battery energy. Available MWh = nameplate × available capacity %. Stored energy changes by AC charge × hours × charge efficiency on the way in and AC discharge × hours ÷ discharge efficiency on the way out, and stays between the minimum and maximum state of charge. Charge and discharge power are derated separately from energy.

Recharge. With no deficit and recharge enabled, spare grid headroom (grid ceiling − load) charges the battery up to its charge rating and maximum state of charge.

Outage test. For the chosen window the grid ceiling is zero and required load falls to the critical share. The remainder is reported as intentionally shed, never as served. Generation is unavailable until the start delay has passed.

Minimum profile size. The discharge rating is the peak net deficit divided by the power derating, with an equal charge rating. The energy is the smallest DC nameplate, found by bisection and rounded up to 0.1 MWh, that serves the whole finite profile from your starting charge. It adds no design margin or redundancy.

Energy cost. Grid MWh × grid $/kWh × 1000 + generated MWh × generator $/kWh × 1000. No demand charges, capital cost or savings.

Background on battery operating constraints: SAM battery dispatch documentation. This tool is an independent simplified model, not SAM.

Assumptions

  • Each profile row is the average MW over an interval that starts at its timestamp. Uploaded loads are total facility demand, so PUE is not applied again, and supply columns replace the default capacities.
  • Generation is dispatchable and follows demand. Its availability is a fixed derating, not a reliability probability. There is no export and no generator charging.
  • Battery capacity, efficiency and power ratings are fixed over the study. Aging and temperature appear only as the allowance you enter.
  • Phased demand and the 24-hour shape are synthetic planning assumptions, not measured telemetry. Project dates anchor the intervals; this is not a construction schedule.
  • Not modeled: network, protection and fault studies, N+1 / N−1 equipment failure, fuel and logistics, stochastic reliability, generator minimum load and ramp limits, UPS and black-start dynamics, fire design, emissions and permitting, or an uptime guarantee.
  • A preliminary planning estimate, not an equipment selection. A qualified power-systems engineer must validate the design, the assumptions and the intended use.
  • Your project stays in this browser. Calculations and file parsing run locally, saved scenarios live in this browser’s storage, and nothing is uploaded unless you send it to AWP yourself.

A preliminary estimate for planning. AWP confirms every figure against your water, site and permit before quoting.

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