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Product · Impact Calculations

The layer that turns energy behavior into economic outcomes.

Forecast savings before launch. Prove them after it runs.

WattShift turns tariffs, runtime signals, and device behavior into the cost and savings outputs product teams, customers, and commercial buyers actually care about.

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Flexible Counterfactual Calculator

Compare base case vs optimized scenarios across different energy system decisions. Choose between Site Design mode (annual ROI analysis) and Operational mode (daily session optimization).

Progressive Energy System Optimization

Each scenario builds on the previous optimization, showing payback times for incremental investments from basic homes to fully optimized smart homes

Optimized Case

Investment Analysis

Smart Rate Plan + Controls

Base Case

Basic home configuration

Electric Bill$285/mo
Gas Bill$85/mo
Grid Revenue+$0/mo
Net Cost$370/mo

Optimized Case

With improvements applied

Electric Bill$265/mo
Gas Bill$85/mo
Grid Revenue+$0/mo
Net Cost$350/mo

Impact Summary

$240
Annual Savings
360
lbs CO₂ Reduced /year
$500
Upfront Investment
2.1
Payback Years
Payback Time: 2.1 years
Based on $240 annual savings on $500 investment

Ready to model your specific scenario?

Get detailed ROI calculations with real utility rates and incentives for customer proposals and investment decisions.

Partner Portal Access

Try our Impact Calculator today.

Savings calculator for customer demos
API documentation and testing tools
Integration support and resources
Real-time pricing data samples
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Use cases

Sales, proposals, and proof in one engine.

Use the same calculator to sell the value before a project goes live, then prove the value after real behavior comes in.

Sales and proposals

Predictive and prospective workflows for showing customers what a tariff, device, or project decision is likely to be worth.

Solar proposal savings
Estimate ROI under export-aware tariffs before install, then compare promised value to operating reality later.
Battery and tariff proposal modeling
Show how battery sizing, dispatch strategy, or a different eligible rate plan changes expected savings.
Electrification ROI scenarios
Compare heat pump, EV, and efficiency upgrades against the customer bill baseline before a project is sold.

Proof and reporting

Retrospective workflows for turning actual device behavior, sessions, and program activity into savings proof.

Monthly savings proof
Turn comfort-preserving thermal load shifting into a monthly savings number the customer can understand.
EV session cost reporting
Show what a charging session actually cost under the territory and tariff that applied.
Program and fleet reporting
Use one engine for recurring commercial reports, portfolio views, and demand-response proof.

How it connects

Why you should trust our calculations.

Impact Calculations combine layered price context, WattShift's own tariff database, and counterfactual baselines so savings forecasts and proof reflect how energy decisions actually price out.

Layered price context
DR, VPP, carbon, wholesale, export, and runtime signals are layered into the calculation instead of treated as separate add-ons.
Internal tariff database
We built our own tariff database because impact calculations are only as good as the coverage, accuracy, and update latency underneath them.
Counterfactual baselines
Compare optimized behavior against the bill, session, or proposal outcome that would have happened without it.

Developer Docs

Ready to use Impact Calculations?

Start with auth, then use the docs to move from savings forecasts into the product and reporting endpoints that support your workflow.

Quickstart
Start with the easiest path into dollar-outcome calculations.
Inputs and scenarios
See how tariff context, runtime signals, and device behavior come together.
API reference
Inspect the endpoint details behind forecast and reporting flows.
Start Building

Build price-aware energy software on one economic layer.

Start with the solution surface that best fits your workflow, then expand as your software goes deeper into operating logic and reporting.

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