Last Updated on: 1st December 2022, 04:09 pm

Tips before you choose the size of home storage battery

Tips Before You Choose The Size Of Home Storage Battery

Battery storage systems are gaining traction as more and more people look for an eco-friendly way of storing their home power needs. These systems allow you to store your home’s power in a sustainable way, by using batteries that can be recharged over and over again.

There are many different types of battery storage systems available on the market, so it’s important to do your research before making a purchase. Here are a few things to keep in mind.


1. Why need to properly size a home storage battery?

2. What factors you should consider when sizing a solar battery system?

3. How to size a home battery storage size?

4. Can I install a home storage battery if I don’t have solar panels?

5. Battery considerations you need to know

1. Why need to properly size a home storage battery?

The energy of a home storage battery is usually given in kilowatt-hours (kWh), which is the amount of energy that it can store. Most batteries on the market today range from 5 to 15 kWh. A battery that’s too small will not be able to power everything and may cause issues with appliances, particularly may cause issue in winter and rainy days. Whereas a battery that is too large will be a waste of money. When the load is relatively constant, a smaller battery means a greater rate of discharge current is required to support it. Long term high current discharge is not friendly to battery life. Therefore, it’s very important to get the sizing of your home storage battery right.

2. What factors you should consider when sizing a solar battery system?

There are a few key questions you should ask yourself when sizing your solar battery system. Is the intended use for this project daily load support, or does it act as an additional backup during outages? That will determine what type of batteries best suit both needs and budgets; small critical applications may require only one main battery while larger off-grid systems would need more sets in order to meet demand at all times without relying on generators or grid.

3. How to size a home battery storage size?

The ideal battery size for your home is one that will cover evening and night-time usage with a little extra spare energy. The electricity demand from all appliances in the house empties out any batteries by morning, so it needs big enough capacity to store what’s left over – which can be collected during daylight hours via solar panels on rooftops.

So how to calculate the ideal battery size for your home? The below method is set home battery system to meet the demand for home electricity.

The first step is to determine how much electricity you use in a day and when you use it. This will give you a good idea of how big your battery needs to be.

There are two ways to find out your electricity usage:
1) Check your electricity bills from the past few months. Look for the section that lists your total electricity consumption in kilowatt-hours (kWh).
2) Use a home energy monitor. This is a device that shows you how much electricity you are using in real time.

Once the battery’s KWH needed for calculation has been determined, we then compare it with solar power. We need to calculate how many hours of full sunlight are required to generate the desired amount of electricity. This will give you the number of panels required; how big your solar PV system should be. Obviously, there’s no point in having a large battery if your PV generation is small – as you’d never be able to fill it.

Home storage batteries may not be able to charge every day, depending on the weather and how much solar electricity your home generates.

So in practice, another case is firstly we know what the existing solar PV system can produce, and then we size the battery energy. Getting this right is a bit complex, which is why our Bonnen expert engineers are on hand to help you find the right system for your home.

4. Can I install a home storage battery if I don’t have solar panels?

Yes, you can still install a home storage battery without solar panels. This is a great way to save money on your electricity bills. Eg. Bonnen wall-mounted Powerwall can be set up so that it can either charge from solar energy or cheap off-peak grid power, rather than being charged with ‘high cost’ electricity during peak times when you’re using more expensive supply rates! There are also other benefits to doing so, including backup power in case of an outage and reducing your reliance on the grid.

All-In-One home energy storage system

5. Battery considerations you need to know.

The type of batteries you use will have a huge impact on the size and power output. There are many factors to consider when selecting your battery bank, here are some key elements that can make all the difference:

DOD: The depth of discharge, is an important factor in determining how long your battery will last. The DOD of a lead acid battery is generally about 50%, meaning that you can discharge the battery to half its capacity before it needs to be recharged. Lithium batteries have become a popular choice for home energy storage due to their deeper depth of discharge (DOD) of up to 80-90%.

Life Cycle: Bonnen LiFePo4 lithium battery storage can reach more than 6000 cycles based on an 80% DOD.

The maximum charge and discharge rate recommended by the manufacturer.
The maximum charge and discharge rate will be listed in the battery’s specifications. It is important to not exceed this rate, as it can cause damage to the battery.

The battery work temperature range: Normally the lithium battery would recommend not exceeding a range of -20°C to +60°C. Below 0°C the battery capacity drops and the self-discharge increases.

Please keep in mind that lithium battery needs to be cared for properly to achieve better performance and longer cycle life. Few tips you need to know:

a. When not in use, please store in a cool and dry place. Do not expose it to direct sunlight or heat for extended periods of time.
b. Avoid using the battery in extreme temperatures. This can damage the battery and shorten its lifespan.
c. Do not overcharge or discharge the battery. This can also damage it and reduce its performance.
d. Keep them charged: Lithium batteries cannot be left uncharged for too long. If you know you won’t be using your device for a while, make sure to charge the battery before putting it away. Charge them every three months as you can.
e. Be careful when handling the battery. Do not drop it or subject it to strong impacts as this can cause internal damage.

If you have any more questions about home battery storage systems or want suggestions on which might be the best choice for you, get in touch with us today!

Contact Bonnen Batterynow and learn more about our Battery Energy Storage System BESS solutions!

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