6.6kW Solar System With Battery
Victorians with a small family size mostly incline to a 6.6kW solar system. We also get inquiries regarding how much is 6.6 kW solar system with battery. Customers who plan to upgrade their PV size in future, need energy/power backup or increase their household electric items, such as the installation of an EV (electric vehicle) charging station, may request a 6.6kW solar system with a battery. In this blog post we’ll see importance of solar battery and it’s cost. We’ll also discuss a real-time use case that explains how much is 6.6kW solar system with battery under different circumstances (e.g. property type).
Essential Topics
How can incorporating a battery enhance the utilization of a 6.6kW solar system?
Battery plays an important role in utilization of a 6.6kW solar system.
- It can store excess solar energy that would otherwise go to waste (if solar PV system is off-grid) when major household electric items are not being utilized during solar peak hours
- It enables users to maximize self-consumption
- Reduces dependency on the grid (in case your energy consumption is mostly at evening or night time)
- Optimizes energy usage
Incorporating a battery into a 6.6kW solar system offers numerous benefits that contribute to energy independence, cost savings, and grid resilience. There are many battery manufacturers that offer built in solar inverters. Fox example, we recommend and offer Alpha ESS batteries to our customers.
How does a battery contribute to energy independence in a 6.6kW solar system?
A battery allows users to store excessive solar energy generated during the day and utilize it during periods of low sunlight, cloudy weather or at night. This reduces their dependence on the grid and provides greater energy independence. Furthermore, it offers peace of mind in case of unexpected power disruptions.
How does a battery provide power backup during power outages or grid failures in a 6.6kW solar system?
A battery in a 6.6kW solar system provides power backup during power outages or grid failures by utilizing the stored energy. During such events, the battery can supply continuous electricity, ensuring uninterrupted power supply for essential appliances. This capability keeps critical devices running even when the grid is down. For example, if you have an urgent need to charge your electric vehicle, the battery in your 6.6kW solar system can keep your EV station ready for that.
Solar PV and battery loans for Victorians
In order to make Australia more sustainable, eco-friendly and for the ease of the consumers (energy independence), federal and state governments are offering interest free loans on solar batteries and PV systems. Apart from these loans, Solar Victoria is also offering rebates on solar panels (PV). Check your eligibility here at Solar PV rebate, check eligibility .
Impact of Solar PV and battery loans
These loans and rebates significantly reduce the upfront cost or out of pocket for the customers.
How much is 6.6kW solar system with battery?
6.6kW solar system with battery cost varies depending on which solar inverter, battery and solar panels you are going to install for your home. However, for your ease, we are going to discuss two options that can best meet your need.
Please note that the pricing shared in this blog varies depending on STCs/suburbs. For an accurate estimation, please feel free to post a comment.
| 6.6kW solar system with Alpha ESS battery | 6.6kW solar system with Sungrow battery | |
| Inverter | If you go for a Alpha ESS battery for your 6.6kW solar system, you don’t have to buy a separate inverter. Because Alpha ESS battery comes with a built-in 5kW solar inverter. This 5kW solar inverter can easily manage/handle your 6.6kW PV system. | You have to buy a 5kW Sungrow solar inverter. |
| Solar panels | Jinko 440W | Jinko 440W |
| Battery backup/storage | Alpha ESS G3 10.1kWH battery | Sungrow 9.6kWh battery |
| Warranty | 10 years replacement warranty | 10 years replacement warranty |
| Estimated Cost | $1300 single story, single phase | $2800 single story, single phase |
Factors that affect 6.6kW solar system cost with battery in Victoria
We’ll highlight major factors that affect 6.6kW solar system cost with battery in Victoria.
- Single or double story (installation struggle varies, thus effects cost)
- Single phase or three phase (changes inverter cost)
We have explained in detail the factors that affect solar system installation costs in this article.
Explaining cost factors for a 6.6kW solar system with a use case
We installed two 6.6kW solar systems for two different customers having same STCs (small technology certificate). For an identical 6.6kW solar system with Alpha ESS 10.1kWh battery backup, one customer paid $900 out of pocket and the second customer paid $1450 out of pocket. The cost variation is because of the property difference.
Customer with double story property type
This customer paid $1450 out of pocket. Let’s take a look at the federal STC’s, state solar PV rebate, PV and battery interest free loan this customer availed (price breakdown).
| Subtotal incl. GST | $15,406.00 |
| Included GST | $1,400.55 |
| 62 STCs 8 × $38.00 | −$2,356.00 |
| Solar VIC PV Rebate | −$1,400.00 |
| Solar VIC PV Interest Free Loan | −$1,400.00 |
| Solar VIC Battery Interest Free | −$8,800.00 |
| Total incl. GST | $1,450.00 upfront cost |
Customer with single story property type
This particular customer paid $900 upfront cost/out of pocket. Let’s take a look at the cost breakdown.
| Subtotal incl. GST | $14,856.00 |
| Included GST | $1,350.55 |
| 62 STCs 8 × $38.00 | −$2,356.00 |
| Solar VIC PV Rebate | −$1,400.00 |
| Solar VIC PV Interest Free Loan | −$1,400.00 |
| Solar VIC Battery Interest Free | −$8,800.00 |
| Total incl. GST | $900 upfront cost |
How property type effects the upfront cost?
So from this use case, we could clearly identify that customer with same STC’s, rebates, interest free loans still have to pay different upfront costs depending on their property types. Double story property always needs more installation measurements (more struggle for installer). Hence, installation charges are increased as compare to single story property.
Similarly, upfront cost varies for three phase and single phase properties. Because three phase property requires a 3 phase solar inverter while setting up the solar system.
Conclusion
Property type plays an important role in determining the cost of a 6.6kW solar system with a battery. Factors such as if the property is single story or double story and if it is single phase or three phase can impact the upfront expenses. However, we recommend Alpha ESS G3 model that comes with a built in 5kW solar inverter plus 10.1kWh battery backup. This built in inverter can take up to 10kW solar PV size. This is the most economical option that we suggest to our customers who do not want to spend more out of pock/upfront cost.
If you are looking for a free quotation with proper solar system design for your property, drop us a message in the comment.
FAQs (Frequently Asked Questions)
Does Alpha ESS G3 give a good energy backup and what is it’s warranty?
Yes, it’s one of the most economical and mostly used battery solution in Victoria. It is a LFP (LiFePO4) with a useable capacity of 9.1kWh. It comes with a 5 Year Product Warranty, 10 Year Performance Warranty.
Do we need a separate solar inverter with Alpha ESS G3 battery?
Alpha ESS G3 comes with a built in 5kW solar inverter. So, you do not need a separate one for this specific 6.6kW solar system. However, if your solar PV size increases (e.g. 8.8kW or 10kW), you may need to get an additional solar inverter.
Can We run 8kW solar PV size with Alpha ESS G3?
Yes, the built in 5kW solar inverter can handle up to 10kW solar PV system. But it is not recommended. To avoid any technical issues, we recommend to upgrade your solar inverter as well for a 8kW solar PV system.
Is 6.6 kW solar enough for a battery?
Yes. 6.6kW solar system is a good option to charge a battery. It will be more useful if you have an electric vehicle or planning to buy one in future.
