6kW or now extra generally seen 6.6kW photo voltaic techniques have gotten more and more common amongst Australian houses due to plenty of components, together with their affordability, ample measurement & ease of approval in the case of connecting to the grid. This text offers an summary of (virtually) every little thing you should know in the event you’re contemplating a 6kW photo voltaic system on your family, together with pricing, power yields and their attractiveness as an funding.
What number of panels in a 6.6kW photo voltaic system? How a lot space required?
A contemporary-day 6.6kW photo voltaic system utilizing 330 watt (W) to 400W modules will include about 17-20 photo voltaic panels. This quantity has decreased so much during the last decade.
Every panel usually measures out to 1.7m2, so the roof space required for a 6.6kW system shall be about 34-38m2 – or probably extra relying on how your roof is laid out and whether or not you require tilt frames (which must be spaced out greater than panels mounted flush on the roof).
An vital be aware about inverters for 6kW/6.6kW photo voltaic techniques
Are 6.6kW techniques the brand new 5kW system?
Though your system could have 6.6kW value of photo voltaic panels, don’t be shocked if the proposed inverter on your system is barely 5kW. 5kW photo voltaic techniques are additionally extremely common in Australia for plenty of causes (together with the truth that that measurement is pre-approved for grid connection on mainly each community within the nation), which implies that 5kW inverters are rather more widespread to come back throughout than 6kW ones. Lots of the 6.6kW photo voltaic techniques in the marketplace are subsequently ‘overclocked‘ techniques with a 5kW inverter.
A 5kW inverter might be overclocked by a most of 33% below the Clear Vitality Council tips to six.6kW however can’t fairly get to 7kW which might require a bigger inverter. This presents advantages akin to higher photo voltaic power yields in early morning and late afternoon – even when ‘peak’ manufacturing is clipped again to 5kW through the center of the day.
How a lot does a 6.6kW photo voltaic system value?
Photo voltaic Selection has been maintaining observe of residential photo voltaic system costs since August 2012 with our month-to-month Photo voltaic PV Worth Index. Primarily based on this information we are able to advise that the common 6.6kW photo voltaic system will value round $0.94 per watt or $5,830 after the federal STC rebate has been deducted as of March 2022 .
The worth of photo voltaic techniques do, nonetheless, differ broadly out there. A extra cost-competitive 6.6kW photo voltaic PV techniques consisting of cheaper, low-end merchandise will value much less, whereas premium choices will usually be pricier.
The under graph reveals the worth historical past of the final couple of years. You’ll be able to see the pricing has remained comparatively flat nonetheless there are some variations relying in your location in Australia.
Common 6.6kW photo voltaic system costs (per watt of photo voltaic panel capability) in every Australian capital metropolis, from August 2012 to the tip of 2021.
Examine photo voltaic quotes from as much as 7 native installers now.
How a lot power will a 6.6kW photo voltaic system produce?
Relying on plenty of components, the precise energy output of a 6kW solar energy system will differ. These variables embrace:
- Location and native local weather
- Orientation and tilt angle of the photo voltaic panel array
- Whether or not there may be any shade solid on the panels
- The efficiency of the person parts (primarily the panels and inverter)
Location is without doubt one of the principal determinants of photo voltaic system power yields, as the quantity of sunshine falling on a photo voltaic system’s photo voltaic panels straight impacts the system’s output. The desk under offers tough approximations for the way a lot power a 6kW photo voltaic system will produce, based mostly on Bureau of Metorology and PVWatts information.
Please be aware that these figures are indicative solely and that now we have endeavored to be conservative in our estimates, utilizing a system effectivity fee of 75%. Additionally be aware that these figures are annual averages – in actuality, power yields shall be increased in the summertime and decrease within the winter.
| North Going through 6.6kW Photo voltaic System | |
| Capital Metropolis | Approx Photo voltaic Vitality Manufacturing* (per day) |
| Adelaide | 24-26 kWh |
| Brisbane | 25-27 kWh |
| Canberra | 24-27 kWh |
| Darwin | 28-30 kWh |
| Hobart | 19-22 kWh |
| Melbourne | 21-24 kWh |
| Perth | 26-28 kWh |
| Sydney | 22-25 kWh |
* Estimates generated utilizing Burea of Meterology historic climate information and PVsyst software program
Batteries with a 6.6kW photo voltaic system?
Batteries with a 6.6kW photo voltaic system?Increasingly households have battery storage in thoughts after they buy a photo voltaic system. The smallest measurement we usually advocate you put in in the event you’re contemplating batteries both now or sooner or later is 5kW; a system of this measurement will usually present loads of surplus power for storing. At barely bigger than 5kW, 6kW techniques would even be a superb measurement for batteries.
Additional studying:
Is photo voltaic battery storage value it?
How lengthy is the payback interval on a 6.6kW photo voltaic system?
The benchmark by which most photo voltaic buyers measure their panel’s efficiency is the payback interval – the variety of years that the system will take to ‘pay for itself in power invoice financial savings & feed-in tariff credit.
The desk under reveals indicative payback intervals, ‘internal rate of return’ (IRR) and annual financial savings within the first yr for six.6kW photo voltaic techniques in a handful of Australian capital cities based mostly on common costs as of March 2022. (Observe that these are outputs from our Photo voltaic System Payback & ROI Estimator software – which we encourage you to discover with your individual numbers.)
Needless to say returns could also be higher for techniques whose value factors are decrease, or in the event you obtain the next stage of photo voltaic self-consumption. But additionally be aware that you just’ll wish to be selective concerning the merchandise and firms that you just contemplate – some offers are too good to be true.
Indicative payback intervals for six.6kW photo voltaic techniques |
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| 6.6kW System Price | Electrical energy Worth | Feed in Price | Self Consumption Price | IRR | Annual Financial savings | Payback Interval (Years) | |
| Sydney | $5,170 | 25c | 5c | 30% | 19% | $977 | 5.2 |
| 60% | 32% | $1,593 | 3.2 | ||||
| Brisbane | $5,170 | 18c | 5c | 30% | 15% | $817 | 6.2 |
| 60% | 24% | $1,223 | 4.1 | ||||
| Melbourne | $4,980 | 27.5c | 6c | 30% | 22% | $1,064 | 4.6 |
| 60% | 36% | $1,728 | 2.9 | ||||
| Perth | $4,380 | 28.8c | 7c | 30% | 30% | $1,272 | 3.4 |
| 60% | 46% | $1,948 | 2.2 | ||||
| Adelaide | $4,940 | 31c | 7c | 30% | 26% | $1,282 | 3.8 |
| 60% | 42% | $2,024 | 2.4 | ||||
| Hobart | $6,710 | 27c | 8.5c | 30% | 16% | $1,101 | 5.9 |
| 60% | 26% | $1,684 | 3.9 | ||||
| Canberra | $4,960 | 20c | 7c | 30% | 19% | $946 | 5.1 |
| 60% | 28% | $1,359 | 3.6 | ||||
| Darwin | $8,970 | 26c | 8c | 30% | 14% | $1,321 | 6.6 |
| 60% | 22% | $1,887 | 4.6 | ||||
Assumptions:
- Common day by day power use = 25 kWh
- 6.6kW System value is the common value from Photo voltaic Selection’s value index for a totally put in turnkey system
- Excludes state-based photo voltaic grants / rebates (e.g. Solar Victoria rebate)
Calculate your individual photo voltaic payback interval utilizing Photo voltaic Selection’s free payback calculator.
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