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How do you choose a solar battery?

Since 2015 solar storage batteries have reduced in cost to the point that pay back for many households is coming down from more than 10 years towards 7 years.

Nevertheless installing battery storage for your solar system could double the price of the system. Costs for quality battery storage is for around 6.5 kWh between $6,500 to $7,500 and for 13 kWh between $10,000 to $14,000. Prices have been steady for the past two years.

In some states you can now get a subsidy or interest free loan to purchase a battery. If you are building a new home or if you seek not to suffer blackouts a battery can be the right solution now.

Discuss with a LG dealer if batteries are feasible in your circumstances, or if you should get a “battery ready” system.


Solar Panel Batteries

Nowadays if you put solar on, you can obviously at the same time consider to put a battery on. If you build a brand new house right now, I would get the solar and a battery put on.

The return on investment on a battery with solar nowadays is still around 6-7 years and it also depends on your consumption pattern.

New homes now have the smarts in TVs, fridges and in washing machines linking straight back to the solar system.

If you do build a new home I say it's certainly worth it, if you have a lifestyle situation where you don't want to have brown outs or blackouts, you want to really have your house protected.

You don't want the ice cream to melt when there's a brown out, you want to tell the neighbours I got the lights on what's happened to you. In those cases again, a battery is a good solution. We suggest to contact the LG dealer network.

Have your house assess have your needs assessed goes through the bill and then see if that's something that you would like to consider.

So thank you very much for joining us here at the LG Energy website. We have frequently asked questions and all the answers.

We have solar beginners guides, videos from dealers, we have output calculators so you can actually see what happens in your area with the solar system and how much it will generate, so please go onto the website do your research if you're looking into solar, LG is the way to go.


Adding a Battery to your Solar System

If you're an existing solar owner and you're looking for batteries. If your system is one two three kilowatts you're possibly really looking to add extra to it.

Because for a battery to be really filled up especially in winter you may need six or seven kilowatts type of solar system so in many cases you will have to add a little bit of extra solar to make the battery work.

My strong recommendation is to get an LG dealer in. It's not easy to add to an existing solar system, sometimes you have to put a separate new system in and a new inverter in it because the rules have changed, so the Australian standard might have to be slightly different for the new system. But overall it will work.

You can add batteries now it does make sense. Especially if you don't want to be hit by a brownout or a blackout in those cases batteries are excellent So thank you very much for joining us here at the LG Energy website.

We have frequently asked questions and all the answers. We have beginners guides, videos from dealers, we have output calculators so you can actually see what happens in your area with the solar system how much it will generate.

So please go onto the website do your research if you're looking into solar LG is the way to go.

If I have existing solar panels, can I add solar battery storage?

The answer is yes, but it only makes sense sometimes. For example, if you have a 2010 1.5 kWh system with 9 panels, then your solar power system is too small to be able to meaningfully fill the battery.

One needs to have at least a 5 kWh system to allow in a normal consumption pattern, enough spare electricity to fill the battery from renewable energy.

Nowadays if you buy a 6.6 kWh system, then in future years this system should be big enough to add a battery.

If you were looking to install an AC battery in which the Telsa battery is a good example, then the inverter solution of the solar system does not matter.

If on the other hand, your are looking to purchase a DC battery solution, then at the time of solar system purchase it makes sense to buy a hybrid inverter, so that the battery, when it is purchased at a later date can be compatible with the inverter.

What is a solar inverter?

Our electricity system uses 240V alternating current (AC), but the electricity generated by solar panels consists of variable direct current (DC). So the DC electricity from the panels needs to be converted to the 240V AC current and this is the role of the inverter.

As inverters transform DC electricity generated from panels into AC electricity for use in the home, they connect to the solar panels and come in two main types.

They are the small ‘micro’ inverters on each panel or ‘string’ inverters where six or more panels are connected to a single larger inverter (about the size of a small travel case – the ones you can take on board of a plane).

Cheaper inverters can sometimes be waiting for repairs or parts for months if the repair will be performed at all. During the waiting period, you will miss out on electricity savings from your solar system - as it is not working, when the inverter is down. Choose a quality Inverter solution to go with quality panels.

Ask your authorised LG Energy Partner for advice on which of the available inverter options is the most suitable solution for you.

What is a solar inverter?

Why choose LG Solar Panels?

Not all solar panels are built the same. When you purchase solar panels from LG Solar you are investing in a product backed by years of experience and manufactured with the help of stringent research and testing standards.


Q. Solar and Batteries

For most households the older, smaller solar systems common 5+ years ago are usually not big enough in kWh size to supply the household and a battery with sufficient renewable energy to create an efficient outcome, meaning keep the battery appropriately charged during the day, to have the full battery capacity available at night.

The most applied solution is to add a 2nd solar system with batteries. This 2nd system would then include a hybrid inverter which can charge the battery. In some instances the new hybrid inverter can also take the solar power from your old smaller system to charge the battery.

Please note: If you change and older system’s inverter with anything other than like for like the solar system installer will have to change the whole solar system to the new Australian standard – as per legal requirement. Often the cost of this upgrade is more than the remaining value of the solar system.

Also the installer via this upgrade, than takes on the legal liability of your older system, and some installers do not wish to have that responsibility; therefore getting older systems upgraded can be a difficult endeavour. Talk to your LG Authorised solar installation specialist about the potential solutions. Please check here for the closest installer near you.

Q. Can you give me some tips for selecting an inverter?

Choosing an inverter is a matter of understanding what performance you need and the price you want to pay for it. Inverters are the heart of a solar system and LG panels should always be paired with a quality inverter. In a high percentage of system failures, the cause is an inverter malfunction.

Inverters differ by several factors:

  1. Wattage rating or how much power in watts the inverter can deliver. For example there are currently 1.6 kWh, 2 kWh, 3 kWh, 4 kWh, 5 kWh and 10 kWh residential solar inverters on the market.
  2. Start-up voltage i.e. at what level of sunshine the inverter will function. The start-up voltage can vary from 90V to 155V depending on the brand and size of the inverter.
  3. Surge power. How much power and for how long it can deliver the power needed to start motors or other loads.
  4. Efficiency, or how efficient the inverter is at low, medium and high power draws, as well as how much power is used when on idle.
  5. Quality or shape of the electrical wave, whether pure sine wave or modified sine wave.
  6. Whether or not monitoring/management software is included and whether it is connected to your router wirelessly or via ethernet.

Choose carefully as an investment into a quality inverter can result in higher efficiencies and also potentially longer life span of the inverter. LG recommends matching a high quality inverter with our solar panels. Your installer can recommend quality inverter brands to you (LG Dealer Search).

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For free advice call 1300 152 179

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