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3kW Solar is the new 4kW solar system. Why? 3.9kW is the largest system configuration available on a 3kW inverter while generating a very similar output (kWh) to a 4kW solar system at a lesser price!
3 kW Solar Deals by Perth Solar Warehouse

Build your ideal 3kW solar power system.

Ensure a 3kW solar energy system which suits you. All PSW 3kW solar packages generate on average 15 units per day. That’s your energy-saving potential.

Howevermany different buying ideals affect what can be considered as your perfect 3kW solar package option. If you’re feeling a little overwhelmed, start by selecting a combination which aligns with your initial budget. We will then do our best to make this work for you.

3.7 or 3.9 kW Solar Panels

Each featured 3.7 or 3.9 kW solar panel option above has been carefully selected to offer extraordinary value for the price. Tap any of the above images to learn more about a particular solar module.

*Cash sale prices listed for single-level, single-phase and single roof face dwellings with a 3kW Goodwe DNS inverter within PSW Installation Zone 1 after STC zone 3 subsidy has been applied. Additional installation costs may apply (inquire).

3kW Inverter

Did you know, Perth Solar Warehouse is a trusted manufacturer certified installation partner for each above brand? Manufacturer partners possess intimate product knowledge and an assured product warranty for the nominated period through advanced training. 

Tap any of the above images to learn more about any particular inverter technology.

Make sure the above 3kW solar prices are our best!

Once you’ve decided which 3kW solar system packages you like the look of, we can then send you; estimated performance, environmental benefits, potential electricity bill savings, return on investment and more!

SALE: Outstanding 3 kW Solar value by Perth Solar Warehouse;

  • Your preferred 3.7 to 3.9kW solar panel option.
  • Your preferred 3kW inverter.
  • WiFi connected monitoring portal.
  • PSW Project management portal.
  • PSW Premium in-house installation.
  • PSW leading 15-year workmanship warranty.
  • PSW Life Support.
  • PSW Rewards Club Gold access.
  • PSW renowned 5-star customer satisfaction.
  • PSW vs the rest, Discover the difference.

Combine your ideal 3kW solar system, exclusive discounts, fully installed package prices!

Considering a battery?

Combine any 3kW solar system with a solar battery for the ultimate in bill reduction success. You’re buying a 3kW solar energy system to do a job, why not make sure it does the whole job with a battery?

Tap any of the below battery images to learn more about a particular battery technology or compare all batteries by selecting this big pink “Compare All Batteries” button.

Frequently Asked 3kW Questions

3kW solar inverters are often more cost-effective than 4kW solar inverters.

In addition, as solar panels often rarely reach peak rated power, many reputable inverter manufacturers state that their inverters can be overloaded by up to 50% of the nominated input capacity.

The Clean Energy Regulator has had their say on this topic and capped oversizing to 33%. 

Therefore, 3kW Inverter capacity x 1.33 = 3.9kW of solar panels.

Discover oversizing solar inverters in more detail here >

This all depends on you. A 3.7kW solar energy system with a 3kW inverter will generate an annual average 15-units (kWh) per day.
However, each bill and usage pattern is different. Almost as unique as your finger print.
Perth Solar Warehouse Sales Support can provide detailed bill reduction estimates based on your past energy usage patterns. In a nutshell, he more past power bills you provide, the more accurate the bill reduction estimates we supply.


It’s all about battery selection. For example, if the only battery you want to install in the future is a Tesla Powerwall 2 (AC-Coupled), then selecting any standard inverter will work.

However, should your preference be a Huawei LUNA2000 (DC-Coupled), then the only compatible inverter is the Huawei SUN2000-L1 or Huawei SUN2000-M1 hybrid inverter.

Unless stated, all 3kW solar packages come standard with WiFi connected production monitoring and service alerts only.

To include energy consumption monitoring an addition monitoring device is required at the main switchboard.

Ask PSW Sales Support prior to your 3kW solar installation for exceptionally discounted prices on energy consumption meters.

Approved Perth and Bunbury region customers (STC Zone 3) enjoy a $1940 subsidy when installing 3.9kW of solar panels on a 3kW inverter.

Based on 54 claimable Small Technology Certificates, with a system utilising 10 x 390W solar panels and a $36 STC market valuation. 

54 STC’s x $36 market value = $1940 subsidy.

All listed Perth Solar Warehouse 3kW solar package prices include the subsidy deducted as a point of sale discount (redeemable by Perth Solar Warehouse after installation).

For the more about the rebate in detail including what are STC’s? Click here >
Most residential 3.7 to 3.9kW solar energy systems installed on a 3kW inverter will qualify for for the Synergy solar Feed-in Tarriff or DEBS (Distributed Energy Buyback Scheme). 
This means, as a level of compensation, you will receive 0.03c ex GST during off peak, and 0.10c ex GST during peak periods (3pm to 9pm) for each unit (kWh) exported to the grid by your solar energy system. 

Eligibility criteria and full pricing, learn more >

With over 17-years of industry presence, Perth Solar Warehouse is one of the few solar retailers who have sought out to become manufacturer endorsed with most stocked products. 

Along with industry endorsements (such as CEC Approved Solar Retailer status), a manufacturer endorsement is a commitment to unrivalled product knowledge on an ultra-refined scale.

Manufacturers will not align with non-reputable brands. If you’re still a little unsure of the difference, visit PSW vs The Rest >

View the entire map of the Perth Solar Warehouse service area for 3kW solar energy system installations. Includes past (and may be even your neighbours) installations, Discover >

Experience 3kW


It's a Perth Solar Warehouse thing.

More than the best 3kW solar deals Perth customers seek. With PSW Life Support we care about your experience now and into the future. 5-star customer satisfaction assures you the ultimate value in 3kW solar.

Your satisfaction is everything  ⭐⭐⭐⭐⭐

Customer Insight

Amanda V 3kW Solar System Review

Very professional. I chose this company as it was WA based and had competitive prices with very good customer service. From start to finish the process was easy very minimal hassle all questions were answered in a timely manner. Installation went without a hitch and the guys did a good job tidying up after themselves. I would highly recommend this company. 

Amanda Veitch

- Google

Trevor Smiths 3kW Solar System Review

We are very pleased with our decision to get our solar system from PSW.
The whole installation process was quick and painless and has been working perfectly all year. We run ducted reverse cycle air con and I used to have a standing order with Synergy for $150 a month, this has been reduced to $20 a month and covers our bills. So approx savings are $1560 per year which means the payback period for the system is less than 3 years for us. I would love to get a battery for the system when the prices come down in the future.

Trevor Smith

- Google

Craig Van Der Laan 3kW Solar System Review

A very easy and stress-free experience. Once I contacted PSW the whole process ran smoothly. There was no pressure to sign-up, all relevant information was sent to me and I was left to make my decision. The date was booked in and the system was installed without any issues. My roof faces East-West but PSW were able to install the system to still make full use of the conditions. Started producing power immediately. Have already recommended PSW to friends and will continue to do so.

Craig Van Der Laan

- Google

With hundreds of real 5-star Google and SolarQuotes 3kW solar system reviews, enjoy peace-of-mind knowing Perth’s most satisfied solar customers purchased here!

Want more?

We Have Got So Much More for 3kW Solar Deals


Think the 3kW solar deals at Perth Solar Warehouse are limited? Then you need to see our extended range. It’s Perth’s largest online solar superstore.

Visit PSW Energy for 3kW Solar Deals

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