To maximize your solar energy benefits, you need a reliable solar battery storage to keep the excess energy produced by your solar panels for later use. The size of the solar battery you need for your solar power system depends on several factors.
- Your energy consumption.
- Your location.
- The amount of sunlight available.
- Your usage pattern.
In this article we focus on grid tied solar batteries and give you a breakdown of all you need to know to make an informed solar battery purchase. This article addresses the following key points .
Basics of Solar Battery Storage
- The number of solar panels you have installed on your roof and the size of your solar inverter determines the amount of power that can be generated throughout the day.
- Your electricity bill gives you a basic idea of the amount of energy you need to be reliant on the grid for when the sun goes down or when solar production is low.
- Knowing these two variables gives you a basic framework of the size of the solar battery required for your specific needs.
What size solar battery do I need for a 6.6kW system?
As a general rule of thumb, a solar battery with a storage capacity of at least 10 kWh can be a good starting point for a 6.6kW solar system.
Depending on where you live in Australia, a 6.6kW solar power system roughly produces anywhere between 17 – 21 kWh per day. The amount of energy you end up using during the day and the energy you send back to the grid does vary based on your respective schedule and needs, however an average household typically sends back around two-thirds of the power produced back into the grid, which in this case is around 13 kW per day. Instead of sending this 13Kw of power back to the grid, adding a 13kW solar battery can help increase your energy independence by using this stored energy when the sun goes down.
In case you are using more power produced by your solar panels during daylight hours, a slightly smaller size solar battery like a 10kW solar battery can be charged using the unused power during the day.
What Size Solar Battery Do I Need for a 9.9kW system?
What size solar battery do I need for a 13Kw solar power system?
- Determine your energy usage: The first step is to figure out how much energy you typically consume in a day. This will be measured in kilowatt-hours (kWh). You can find this information on your electricity bills, or you can use an online calculator to estimate your daily energy usage based on the appliances and devices you use.
- Estimate your backup power needs: If you’re using the battery bank as a backup power source, you’ll need to determine how long you want the batteries to last during an outage. For example, if you want your battery bank to provide power for 24 hours during a power outage, you’ll need to multiply your daily energy usage by 24.
- Account for losses: When sizing a battery bank for a solar system, you’ll also need to account for losses due to factors like temperature, wiring, and inverter inefficiencies. A general rule of thumb is to add 20-30% to your energy usage estimate to account for these losses.
- Determine the battery capacity: Once you have an estimate of your daily energy usage, your backup power needs, and the losses you’ll need to account for, you can use these numbers to determine the capacity of the battery bank you’ll need. To do this, divide your total energy requirement by the voltage of the batteries you’ll be using. For example, if you’re using 12-volt batteries, you would divide your total energy requirement by 12 to determine the size of the battery bank you need.
Solar and Battery Package
- Reputable solar panel installers like those from Solar Power Nation, offer a solar and battery package that includes both the solar panels and a battery at attractive prices.
- A solar and battery package is convenient, as it takes the guesswork out of choosing the right battery for your system.
- It is important to carefully consider the battery options offered in the package, to ensure that they are the best fit for your energy needs.
- It is best to consult with a solar installer to determine the best size of the battery for your specific needs.
- Lower electricity bills: By generating your own electricity with a solar system and storing excess energy in a battery, you can reduce your reliance on the grid and lower your electricity bills.
- Increased energy independence: A solar and battery system can provide you with greater energy independence and resilience during power outages or times of grid instability.
- Environmental benefits: Solar energy is a clean and renewable energy source that can help reduce your carbon footprint and contribute to a more sustainable future.
- Improved property value: A solar and battery system can increase the value of your property and make it more attractive to potential buyers.
- Government incentives: In Australia, there are a range of government incentives and rebates available for households and businesses that install solar and battery systems, making it a more affordable option for many people.
- Cost savings over the long term: While the initial cost of installing a solar and battery system can be relatively high, it can provide cost savings over the long term as you rely less on the grid and generate your own electricity.
How to choose a good solar battery?
You can also read our blog post specifically discussing the types of solar batteries available and comparing Lead-acid vs lithium-ion batteries here – https://solarpowernation.com.au/which-type-of-solar-battery-is-right-for-me/
In order to choose the right solar battery for your needs, there are some basic things to keep in mind as a buyer –
- Battery Capacity
The battery capacity should match your energy needs. You should evaluate the power your solar panels generate, how much you consume and how much you want to store.
The SolarEdge battery is a great battery option which offers an ideal sized solar battery for many homes, with 10 kWh usable electricity and the option to add more batteries if required. It requires at least 5 or 6kW of solar panels to power it – ideally 10kW. The Alpha-ESS battery is another great option, with 13kWh storage size and is priced very competitively.
- Life Expectancy and Warranty
Look for a battery with a long lifespan. Lithium-ion batteries typically have a longer life span than lead-acid batteries, but they also tend to be more expensive.
A great option for a solar battery with an attractive life expectancy is the Tesla Powerwall 2 which has a warranty of 10 years from the date of installation. This 10 year warranty covers any defects in materials and workmanship. However, the expected life expectancy of the Powerwall 2 is longer than the warranty period, and Tesla estimates that it can last for up to 15 years or more with proper maintenance.
Look for a solar battery with a high-efficiency rating. This will ensure that you are able to store as much of the energy generated by your solar panels as possible.
Make sure that the battery you choose is compatible with your solar panel system. Some batteries may only work with certain types of solar panels, so it is important to check the compatibility before making a purchase.
Some Solar Battery Reviews in Australia
Here are reviews for a few solar battery options in Australia, to help you make an informed decision.
- Tesla Powerwall
- Usage patterns: How often the battery is charged and discharged can affect its lifespan.
- Environmental factors: The temperature, humidity, and other environmental factors can affect the performance and lifespan of the battery
- Maintenance: Proper maintenance and monitoring of the battery can help ensure that it operates optimally and lasts as long as possible.
- Battery degradation: Over time, all lithium-ion batteries, including the Powerwall 2, will experience some degree of degradation, which can reduce their capacity and performance.
3. Alpha ESS Battery: The Alpha ESS Battery is a type of lithium-ion battery designed for use in home energy storage systems. The Alpha ESS Battery is available in a range of sizes, from 4.8 kWh to 102.4 kWh, and can be configured for on-grid or off-grid applications. The solar battery is designed to be modular, which means that multiple batteries can be connected together to increase the total storage capacity. It is recommended that you do your research and read up on different home solar battery reviews from other users, as well as consulting with a professional solar panel installer, to ensure that you make an informed decision when choosing a solar battery for your home. You are always welcome to give us a call at Solar Power Nation to speak to our solar experts to gain a better understanding of the best options suiting your needs specifically.
Real Customer Reviews and Installations of Solar Panel System with Battery
- Glenyce Kerrigan – Coomera, QLD 4209
- Zuzanka Kutena – Mount Victoria, NSW 2786
- Nhan Phan – Burton, SA 5110
- Moise Butoyi – Elizabeth North, SA 5113
- Neeraj Kumar Rakhra – Southport, QLD 4215
- Vignesh Sundram Kandaswaami – Bray Park, QLD 4500
- Choosing the right solar battery for your home is an important decision that will affect the performance and efficiency of your solar system.
- Consider factors such as capacity, life span, efficiency, compatibility, and warranty when choosing a solar battery to ensure that you get a good battery that will provide reliable performance for many years.
- If you are unsure what solar battery is right for your home, consult with a professional solar panel installer who can help you choose the right battery for your energy needs.
Keep in mind that this is just a general guideline, and the size of the battery bank you’ll need may vary depending on your specific circumstances. It’s always a good idea to consult with a professional solar installer to help you determine the best battery size for your particular situation.
Call us at Solar Power Nation today and speak to our solar experts to learn more!