Best 6.6kw Solar System — Discover Solar

Discover Solar
2 min readAug 24, 2023


How many panels do you need to install a 6.6kW solar system?

The answer to this question depends on the number of solar panels used during the installation of a 6.6kW solar system. For instance, if we talk about 415-watt panels, a 6.6kW solar would be made of 15 modules, or a little over 6.6kW or 16 array.

How much can you expect to pay for a 6.6kW solar system?

In Australia, you can expect to pay out somewhere between $5,000 to $9,000 for the best 6.6kW solar system installation if it is done by a reputable company using premium-quality products. We strongly advise you not to get pressured into buying a 6.6kW solar system from a company that asks for your postcode in order to access discounted pricing. We want you to have the installation of the best 6.6kW solar and not face any long, painful disappointment.

The key takeaway is that if you want to get the best value on your installation, a 6.6kW solar is the perfect system size for you.

Why you should choose 6.6kw solar system size?

A 6.6kW system size may appear rather an unusual number to you. If we speak in general terms, a 6.6kW designs offers the best return in terms of kilowatts on your investment. In addition, as per the calculations done by us, if you are receiving a feed-in tariff that is somewhere between 8c or more per kilowatt hour, you are bound to get the best return on your investment.

What is “oversizing” solar panels?

The term “oversizing” solar panels refers to a situation when you install a system that has a capacity greater than the inverter. This is kind of an ideal situation and highly recommended by us since they are completely safe and does not impact the inverter. Also, you will receive the highest incentive available, also known as solar rebate, since they are calculated on panel capacity rather than the size of the inverter.

Why choose a 5kW inverter instead of 6kW?

In addition to the benefit that a 5kW inverter is more cost-effective than a 6kW inverter, solar systems quite often do not produce as much electricity as their quoted capacity due to a wide variety of reasons. While one of the significant reasons being the temperature, other reasons include dirt, dust, and wire losses. In other words, by pairing a 5kW inverter with 6kW (or 6.6kW) of solar panels, you’ll actually be assuring the inverter operates more frequently at the performance level for which it was intended.

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