Default settings

Key inputs and assumptions

Below are the key inputs and assumptions I use in my analysis. Click “Change” on any line to enter a different value, tick or untick the scope below, then send it through — I'll use these in my analysis.

Analysis

Finance

Site

NMIs
1
Export limit
30kW
Existing solar
How many kW? How old? Inverter size?
Grid connection
3 phase
Consumption growth
0% per year

Settings

Currency
AUD
Analysis length
10 years
Start date
3 months from today
Inflation
3% (AU 10 year average is 2.96%)
Discount rate
8.0% = WACC / Opp Cost of 5% real + 3% inflation + 0% risk
Tariff timings
Retail tariff TOU timings will match the network timings
Forecast error factor
25% reduction applied to forecast savings and revenues

Solar

Make / Model
Generic
Available space
Advise max kW if known. If not, a desktop estimate will be done.
Upfront cost
$950 /kW installed
Ongoing cost
1% of upfront cost per year
Degradation
0.45% per year
Replace inverter year 10
No
Array
0° azimuth. 15° tilt. 14% system losses. 96% inverter efficiency
Solar oversizing
Solar kW = 1.2x inverter kW

Battery

Make / Model
Generic Li-ion
Specs
86% RTE, 90% DOD, 5% standby losses
Configuration
AC Coupled
Degradation
1.6% capacity loss per year
Speed
2 hour (0.5C)
Upfront cost
$850 /kWh installed
Ongoing cost
1% of upfront cost per year
Replace battery year 10
No

Admin

Delivery
3-5 business days
Price
See full pricing
Changes / updates
$125 per 1/2 hour after initial report has been delivered.

Anything else?

Your details

Prefer email? Reach me directly at tim@johnsonenergyconsulting.com.au.