S

Solar System Fit

Sydney - live model

Quick guide

What to fill out

1. Your Usage Pattern

Choose the closest profile, enter daily usage, or describe the pattern in plain English. Commercial users can upload interval data when available.

2. Your Power Cost

Enter flat or time-of-use rates, feed-in tariff and annual price increase. Upload a bill if you want the project record to keep the bill details.

3. Your System

Select city, roof orientation, tilt, panel count and shading. If there is existing solar, enter it separately so it is modelled but not costed as new solar.

4. Battery

Enter the battery capacity you want to test. Leave it at zero for solar-only. The model charges from surplus solar and discharges into later load.

Reading Suggestions

The three sizes compare independence, lower export and payback. If you enter your own system size or extra/new solar size, the suggestions hide and the model analyses your chosen system.
Ready with defaults Edited or confirmed
1
Usage pattern Choose or describe usage
2
Power cost Enter tariff or bill values
3
Solar system Set city and roof details
4
Battery Optional storage size
Save & Share

Sign in to save projects, uploads and calculation runs to Supabase.

Estimate only, not a quote.

Saved projects include entered data, uploads and chosen profile.

Saved projects
Solar and battery analysis

Choose the right solar path for the site.

Solar System Fit helps compare usage, solar production, grid imports, exports, batteries and payback using a transparent hourly model. Start with residential or commercial customers so the inputs, tariffs and outputs match how they actually buy power.

Residential For homes using bills, daily usage and household usage patterns. Commercial & Industrial For businesses using bills, interval data, tariffs and weekly operating patterns.
SOLAR SIZE 0 kW Solar array modelled
BATTERY SIZE 0 kWh No battery selected
Annual generation 0 kWh Sydney north baseline
Annual savings $0 Before finance and final pricing
Simple payback - Years to recover system cost
System price Modelled Use override for proposal pricing
Self-consumption 0% Solar used on site
Grid reduction 0% Before vs after solar/battery
Export % 0% Solar sent to grid

System details

Using default installation details.

Annual Energy Flow

Annual import, consumption, solar generation and export reconciled from the current model.

Assumptions

    Financial

    Cost, savings, payback and finance term options.

    This is not a finance quote. It is a guide only and is subject to approval, terms and conditions.

    Payback & Cashflow

    Net and accumulated cashflows, nominal dollars, 25 years, with 1% annual production degradation.

    Net cashflow Solar upfront costs Battery upfront costs Accumulated cashflow
    Cashflow basis table
    Year Solar cost Battery cost Savings Maintenance Net cashflow Accumulated

    Equipment

    Selected panels, inverter/controller and battery equipment with manufacturer datasheet and warranty links.

    Annual Monthly Summary

    Monthly solar, load, import and export update as the model changes.

    Solar Winter solar Load Summer battery Winter battery Grid import Export

    Daily Energy Activity

    Annual average day from the current hourly scenario table.

    Load before Load after Solar generation Battery state-of-charge

    Energy Metrics

    Average monthly metrics from the current scenario table.

    Solar PV Consumption

    By activity, approximate when DC coupled, from annual modelled solar flows.

    Month Solar
    kWh/day    		 Total Load
    kWh/day    		 Grid Import
    kWh/day    		 Export
    kWh/day    		 Self-suff.
    % of load from solar    		 Old Bill
    $/mo    		 New Bill
    $/mo

    Monthly Solar vs Grid - Energy Breakdown

    Direct solar Battery to load Grid import Solar export Generated

    Monthly Production

    Scaled from the Sydney north-facing production shape and adjusted by roof plane.

    Average Daily Solar Production per Month

    Monthly generation divided by days in each month.