Solar sizing for homes, business & industry
Size solar
the way engineers do.
Turn a list of appliances into a complete hybrid system — inverter, battery and solar array — with string layout, matched products and a bill of materials. From 1 kW to 1 MW, in minutes.
Three sectors, one engine
Built for the home, the business and the plant.
The same transparent sizing engine, tuned to the loads, supply and scale each sector actually has.
Homes, villas & apartments
Residential
Keep the lights, the fridge and the evening on.
Explore residential sizing
Offices, hotels, schools & clinics
Commercial
Daytime demand, met by daytime sun.
Explore commercial sizing
Factories, farms, plants & mine sites
Industrial
Megawatt thinking, engineering discipline.
Explore industrial sizing
ready to quote
Everything a quote needs
From appliance list to installable system.
Each sizing goes beyond three headline numbers. You get the working, the products and the paperwork.
- Inverter, battery & arraykW, kWh and kWp, with the surge and night-time energy that drive them.
- String layoutPanels per string and strings per inverter, checked against the voltage window, hot and cold, and the input current.
- Matched productsReal inverters, battery modules and panels from the catalogue, with alternatives.
- Shareable report & CSVA clean report link, a printable version and a bill of materials to download.
How it works
Four steps. A few minutes.
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01
Choose the site
Home, office, commercial building or industrial plant — then start from a ready scenario or a blank list.
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02
List the loads
Appliances with quantity, power and running hours, split between sun hours and night. Or import a spreadsheet.
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03
Set backup & supply
Grid-tied, hybrid or off-grid, single or three-phase, generator or not — and how long the essentials must run.
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04
Get the system
Inverter, battery and array, string layout, matched products and a bill of materials — saved and shareable.
On site, on any screen
Size it where you stand. Share it in a tap.
The tool works on a phone as well as a desktop, so you can build a load list during the site visit and send the client a clean report link before you leave.
- Phone, tablet or desktopThe same four steps on any screen size.
- One link for the clientA shareable report, a printable version and a CSV bill of materials.
- Saved to your accountEvery sizing is kept in your dashboard to revisit, edit and re-share.
Why it matters
Power for the moments that matter.
Dinner on the table, the match on the screen, homework under a working light. A well-sized system is the one nobody notices.
Planning numbers you can defend
Transparent by design, honest about limits.
Show the working
Every result lists the formulas, factors and intermediate values behind it.
Real products
Sizes are matched to stocked inverters, batteries and panels — not just theoretical kW.
Review flags
Larger commercial and industrial systems are flagged for engineering review.
Planning, not permits
Confirm every design against datasheets, a site survey and local wiring regulations.
Questions
Asked and answered.
More in the help centre and the glossary.
What does the solar sizing tool calculate?
It calculates the hybrid inverter size in kW, the battery capacity in kWh and the solar array in kWp — then lays the panels out into strings, matches real products and lists a bill of materials.
Who is it for?
Homeowners, installers, EPCs, engineers and sales teams sizing residential, commercial and industrial systems from 1 kW up to 1 MW.
Is it free to use?
Yes. Create a free account to size systems, save them, and share the report.
How accurate is it?
It is a planning estimate built on standard engineering practice: daily and night-time energy from your load list, diversity, motor starting surge, conversion losses, battery depth of discharge and ageing, your site’s sun hours, and string voltages across temperature. Confirm every design against manufacturer datasheets, a site survey and local regulations.
Can I share or print the result?
Every saved sizing gets a report link you can share, a printable version and a bill of materials you can download as a CSV.
Free account · No credit card