Digitalisation & AI
Solar Sizing & Design Tools
Two tools on powernsun.com that bring transparency to every project — numbers the customer can trust, worked out by a validated rule engine, with AI only assisting.
Sizing Tool
From a load list to an orderable system.
One engine, one rule set, applied identically every time — across four site types and four system types: on-grid, hybrid, PV-diesel and off-grid.
Site
Site type, location, peak sun hours, supply phase and grid quality.
Loads
~65 catalogue appliances or custom loads: quantity, kWh, hours and priority tier.
Backup
Which tiers stay on — Essential, Important, Comfort — for how long, solar fraction and tariff.
System
Inverter kW, battery kWh, PV kWp, charts, warnings and ranked equipment options.
Diversity & surge
Peak demand diversified by load count; worst-case motor inrush added on top.
Battery
The larger of the energy and power needs — and it states which drove the size.
Inverter
The largest of backup load, surge, PV DC:AC ratio and a minimum.
PV array
Daily energy × solar fraction plus round-trip losses, over peak sun hours × derate.
Product matcher
Keeps only combinations that meet surge, kWh and stacking rules, then ranks them.
Honest warnings
Flags an exceeded envelope, oversized arrays or no one-day recharge.
Design Tool
From an electricity bill to a branded proposal.
A pre-sales design tool for grid-connected, hybrid and off-grid PV systems — one flow from enquiry to proposal.
Solar resource
Measured (PVGIS, NASA POWER) or modelled irradiance on each array plane.
Sizing & layout
The smallest of demand, roof, budget and grid limits; real module layout and row pitch.
Strings & inverters
Voc and Vmp temperature limits per IEC 62548 / NEC 690.8.
Simulation
Hourly dispatch: self-consumption, export limits, battery state, unserved load.
Electrical & finance
Cables and protection; 25-year cash flow with payback, NPV, IRR and LCOE.
Outputs for every audience
Technical report, presentation, CSV / DXF drawings and customer proposal.
Work together
Let's build a better today and an even brighter tomorrow.
Partnerships, distribution, investment, speaking or mentoring — reach out directly.