Solar estimator & design · beta

WattGro

What would solar do here?

WattGro

A public solar estimator and a full design platform, engineered by Power & Sun. Anyone can see the energy and savings a site could deliver from measured sunlight, and engineers and EPCs can take the project from survey to handover.

  • Free estimates for grid-connected, hybrid, off-grid and solar-plus-diesel sites, with no account
  • Energy and savings only: never a price, and indicative to roughly ±15%
  • A firm EPC price comes from an engineer, after a site survey
  • Full design tool free for 60 days or 5 completed projects, with no card needed
~1 min
To a free estimate
4
System types
8,760
Hourly steps in a full-year simulation
60 days
Free trial of the design tool
A family outside their home
A couple working through household bills
A team reviewing project data on laptops

From the first enquiry to the handover

One tool for the whole project.

Win the work

Estimator enquiries arrive as CRM leads, with customers, deals, a pipeline and follow-ups.

Survey the site

Roofs and ground arrays drawn to size, measured weather data, and bills turned into load profiles.

Design the system

Hour-by-hour simulation, with strings, cables and protection checked against the equipment.

Equipment catalogue

One priced list covering modules, inverters, batteries, generators and switchgear.

Quote and issue

Bill of quantities, payback, IRR, NPV and LCOE, approved by a second engineer before pricing.

Deliver and review

Milestones, Gantt charts, snag lists, commissioning checks and handover.

Work together

Let's build a better today and an even brighter tomorrow.

Partnerships, distribution, investment, speaking or mentoring — reach out directly.