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.
Interested in getting a solar battery solution for your home?
We can all agree that if you have a solar system, what''s the point in wasting any energy that you are generating. It makes sense to just store it, right?
Solar batteries have become increasingly popular within Australia and I would also argue that they are becoming more and more valuable in terms of benefits, ROI and future systems like VPP''s.
Well, if you''ve ever read any of my previous blogs you''ll know that I never really like to pick a ''best''. Simply put, every home is different. Every homeowner is different and everyone’s goals are different.
Therefore, one battery might work for your way better than another battery. It all really depends on your home, goals, energy bills and system you''re looking for.
I talk about this much more in my guide, how to buy the best solar battery. Here I talk you through the consultation steps we go through with our clients every day. Don''t hesitate to give it a read.
Quickly, if you want to, you can check out my full powerwall 2 review. I also recommend Sonnen batteries to anyone who is interested in home battery salutation, and you can read my sonnen review here.
First of all, let''s talk about the size difference between the two batteries. This is important to differentiate between which one might suit you best.
If you have a big system capable of producing a lot of energy, it''s best suited to go for the bigger battery.
So, a Tesla Powerwall 2 has a peak usable energy of 13.5kWh whereas the LG Chem only has 9.3kWh.
Really what this suggests is that if you use a lot of energy in your home at night, or during the times that you want to be using your battery then you should consider the bigger battery.
However, if you don''t have a large system, or don''t need a large system then it would be more wise to look at the smaller size battery as that would work better for you and your budget.
That''s right. LG Chem does have a higher efficiency rating when compared to the Tesla Powerwall 2. This is most likely down to the fact that LG Chem is DC coupled compared to Tesla’s AC which I''ll go through below.
The LG Chem has a round trip efficiency of 96% whereas the Tesla Powerwall 2 claims 90% round trip efficiency.
Quickly to summarise what round trip efficiency means, when your energy is produced by your panels it gets sent to your solar battery and stored. This energy will be stored as DC current in your battery.
Tesla''s Powerwall 2 is AC coupled. Essentially, this is where your battery is connected to the grid line as well and your home. It''s the most common these days along with Hybrids which can offer both.
This also means it can be easily installed into any current system with the use of an additional Tesla inverter. AC coupled makes installation a whole lot easier meaning you can design a system around your needs better.
However, AC does route the energy a few extra steps meaning you could miss out on the efficiency side of things. Energy gets converted from the solar panels into the inverter then converted once again when coming out from the battery. One plus side is that you can pull energy from the grid to charge your battery as well.
LG Chem is DC coupled. This means energy goes straight from the solar panels and into the battery. Technically speaking, DC coupled batteries tend to have a higher efficiency because the energy doesn''t need to go through the inverter until the battery has been fully charged.
DC coupled is much harder to install and may mean the price get''s hiked up. A lot of installers don''t like to do DC coupled as it''s not user friendly.
DC current is also known as direct current and if installed incorrectly, or done by shoddy solar installers can cause fires or health and safety hazards. SolarEdge and other systems avoid areas like this to maintain high safety.
Tesla wins here. Their Powerwall 2 does come with a better warranty than LG''s Chem. Although they both offer 10 years, Tesla provides it at 70% degradation whereas LG is 60%.
Although it''s a small figure of 10%, it may add up over a period of time making your LG battery degrade quicker and become less efficient. Degradation means it won''t hold as much energy and your energy will get used quicker.
In terms of price, there really isn''t much between these two batteries. I think you can get an LG Chem slightly cheaper than a Powerwall, but the price is constantly changing which is frustrating.
This really makes it quite hard from a price point to differentiate the two. Usually I would say if you are looking for a quick ROI from your battery, go for the cheaper option. However, because there isn''t much between the prices I''d say either one would be great.
Tesla powerwall and LG Chem RESU batteries are two powerful products with excellent details. Let''s see their individual specifications so that you can figure out the one to choose
The outlined product features above are direct distinguishing factors between Tesla powerwall and LG Chem.
I just want to add, sometimes on paper one might seem better. However, there are many factors you might need to consider which are going to allow the battery to work the hardest for your budget.
Choosing between the Tesla powerwall and LG Chem RESU can be very challenging because both batteries are fantastic. They both have a great capacity to deliver satisfactorily to your expectations.
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