How Solar Power Works ...
- Solar panels absorb the sun creating DC power.
- The Inverter changes DC power to AC power.
- The Inverter sends the AC power to the switchboard to be used during the day.
The unused portion of power is sent off to the grid, giving you power credit.
The sun hitting the panels at different angles during the day will give an average output of 5 full sun hours of power/day.
Eg. Over 365 days:
1kw system 1825 kw / year
- 2kw system 3650 kw / year
- 5kw system 9125 kw / year
Eg. 1 kw System: Total of 5kw generated from a 1kw system.
|Typical Power Bill:||Tariff 11||2300kw x 0.23c||$529.00|
|(91 day period)||Tariff 33||700kw x 0.13c||$ 91.00|
From our typical power bill, Tariff 11 is using 25.27kw/day. The solar panels are generating 10kw during the day.
Let’s say 5kw to run your household and 5kw goes back into the grid via a new kw/hr meter.
With a 5kw system connected generating 10kw/day, this scenario will help you understand how your grid connect system will make you money.
The majority of the power consumption will be late afternoon and night time (cooking, tv, computers, lights, air con). During the day you will be running fridges/freezers.
(Tariff 33 or 31 is unaffected by the Grid Solar).
It makes sense for you (as the consumer) to reduce your power bill further by connecting appliances to these cheaper tariffs (freezers, clothes driers, air conditioners, pool pump, hot water etc.)
- 5 kw
20kw x 0.08 cents
|20.27 kw||$1.60 x 91 days|
|20.27 x 0.23 x 91 days = $424.25|
+ Tariff 33
|Total Electric Bill||$515.25
If you are still in credit after a 12 month period, your electricity provider will have to pay you.
This, in turn, means that every time there is a price rise from the electricity provider your system becomes more and more valuable. However the government will taper off the subsidy over the next five (5) years so it makes more sense to DO IT NOW!
Every power bill you get is a different amount due to seasonal influences (such as using air conditioning during summer). To get an accurate idea on your 91 day consumption, get four (4) consecutive power bills, add them together and divide by 4.
We have calculated that payback periods will vary slightly between 4.5 - 6 years, depending on your power consumption during the day.