We explain how battery systems work and review the leading solar batteries in Australia for various home solar and off-grid systems, including Sigenergy, FranklinWH, BYD, Sungrow and Powerplus energy. Including battery pricing, sizes, compatibility, and unique features. Contact online >>
We explain how battery systems work and review the leading solar batteries in Australia for various home solar and off-grid systems, including Sigenergy, FranklinWH, BYD, Sungrow and Powerplus energy. Including battery pricing, sizes, compatibility, and unique features.
Evidence shows that deep discharging Lithium (LFP) batteries increases aging and reduces battery life. In this article we explain what causes accerated battery capacity loss and how to prolong the life of your battery system. We also highlight other issues which can occur when batteries are deeply discharged.
Jason Svarc is an accredited solar and battery specialist who has been designing and installing solar and battery systems for over a decade. He is also a qualified engineer and taught the off-grid solar design course at Swinburne University (Tafe). Having designed and commissioned hundreds of solar systems for households and businesses, he has gained vast experience and knowledge of what is required to build quality, reliable, high-performance solar power systems.
Since our methodology on how we rank batteries prioritizes warranty and modularity categories, the Home 8 receives a lower score for its lack of modular sizing options and average warranty. But that doesn't mean the Home 8 is a bad battery. The main benefits that the Home 8 offers is power, lots of storage capacity and a decent price tag. If this is what you're mainly looking for in a battery, then the Home 8 is worth considering. Besides the actual battery itself, you'll also get a powerful inverter and the gateway component.
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"It is an all-in-one system -- it's not just a battery," Jim Brown, senior account manager of LG Electronics' US Energy Storage Systems division, told CNET. "I know 'battery' is the generic term for energy storage these days, but this approach by LG Electronics goes beyond the battery to a complete system."
We didn't conduct any hands-on testing for this review. Home batteries are part of a complex home energy system that heavily varies between houses. Instead, this review is based on publicly available information online from LG Electronics and an interview with Brown to get the most up-to-date information.
The LG ESS Home 8 offers quite a bit of storage capacity (14.4 kWh), so if you're looking for a larger battery, this could be an option. You can also install up to four units to further increase your storage capacity. As far as performance and power are concerned, the Home 8 does pretty well. The LG Home 8's warranty is also fairly standard, but we'll talk more about these things below.
This is an AC-coupled system, meaning it's compatible with new and existing solar panel systems. It can also be installed without solar panels as a stand-alone power source, so if you don't want solar, you won't need it.
The Home 8's design is compact -- you'll only have two boxes on your wall. The battery cabinet is the larger of the two "boxes" and houses the battery modules and inverter. Then there's the Smart Energy Box, which acts as a sort of power management system, monitoring energy consumption, solar generation and grid power status.
If you're looking for a larger capacity battery for your home, the LG ESS Home 8 has you covered. One Home 8 unit can store up 14.4 kWh of usable energy. If you want to store more, you can install up to four LG ESS Home 8 units for a total usable storage capacity of 57.6 kWh.
Keep in mind that while the Home 8 does have a modular battery design, it's mostly for the benefit of the installer. A modular battery features several small battery modules that connect together versus one giant battery. These small modules are much easier to carry and install than just one large lithium-ion battery. Modular batteries can also be easier to repair because the individual modules can be removed. This could save you money on labor costs, but this is definitely an installer benefit -- not one you'll notice.
"We have four separate battery modules and we built them in a modular fashion because of the weight of the system," Brown said. "As we remove these battery modules, we reduce the cabinet weight, which makes it very easy for two people to install."
Most modular battery designs we've seen offer multiple capacity options and the ability to upgrade your storage capacity in small increments. This gives you more wiggle room in deciding what size of battery is "just right" for your home. And while the LG ESS Home 8 is a modular system, you still only have one option when it comes to the capacity of a single Home 8 unit. If you need more energy storage, you'll have to buy another 14.4 kWh LG ESS Home 8 battery, and this can get expensive.
The way we score batteries gives those that are more modular an advantage because you buy closer to as much battery as you need, not way more. But if 14.4 kWh (or a multiple of it) is what you need, don't worry too much about the modularity of this battery.
First, let's talk about round-trip efficiency. This is essentially a measure of how much energy actually makes it into storage without getting lost along the way. The LG ESS Home 8's round-trip efficiency is marked at 90%, about average for residential lithium-ion home batteries.
A battery's depth of discharge is the amount of energy you're actually able to use from the battery relative to its maximum capacity. Another way to look at it is the manufacturer's limit on the amount of energy you can safely drain from your battery without damaging it. The Home 8 uses that "blocked-off energy" as a sort of safety cushion for when the power goes out and your battery is empty.
"We've built in the hard floor so nobody can kill the battery," Brown said. "Because we built in the floor and have reserve capacity, the Home 8 will wake up every two hours and look for juice."
And while this is a cool feature, it still limits the amount of energy that you could have access to on a daily basis. The actual capacity of the Home 8 is 15.8 kWh, but you'll only be able to use 14.4 kWh. We found the average depth of discharge for these types of batteries to be at about 95%. The Home 8 falls a bit lower, at 91%.
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