If you are Grid Connected or have old energy bills you will see a graph with your consumption patterns, besides this, you will see on average how many kWh/day of power you are using, this is an indication of how much power you need to produce for day and night time usage. Keep in mind it does not tell you how much power you are using through the night to calculate a battery bank size. From around 4 p.m. (depending size of solar array, physical location Orientation and season of year) your solar system will not be producing much usable power, from here is when the energy that solar system has stored into a battery bank will be used following right through to the next morning also when the sun is high enough for panels to produce energy again directly for household use as well as charging depleted batteries from the evening before.

If you were to take a simple meter reading in the afternoon around 4 pm and again in the morning @ 8 am you would roughly know how many kWh/Night you need to store into a battery bank, If it’s not summer and you take a reading then you will need to calculate some AC run time also or maybe look at past summer energy bills to get an indication. Our service to you – (We could also confirm this by placing an energy monitoring system in your meter box to best size a battery bank for your home. kWh’s consumption needs to be taken into consideration with actual constant demand- (A calculation of how many amps/watts/hours all of your appliances may be drawing at any given time throughout the day)

Determining a suitable battery bank type and size will be one of the most important considerations in system selection and worst regret if you get it wrong. Some battery banks don’t work well-adding capacity at a later date. Mixing new cells with older slightly depleted cells in Off-Grid systems containing Lead Acid Gell batteries is defiantly not recommended and this is to date the most proven technology for pure Off Grid Pure Solar Systems.

Grid systems are more adaptable with newly developed Lithium technologies containing a BMS (Battery Management Systems) charging at the individual cell level, allowing each cell to charge to 100% capacity every time charging takes place provided there is enough solar or generator supply to complete a full charging cycle. In addition, most Lithium battery banks are designed to be expanded on. Grid systems also have the advantage when the battery bank reaches its cut-off limit the system will automatically supply power from the grid.

Battery banks to date are the bulk of a system cost. In another three years, we hope to see cost fall into line with the balance of solar system components. More so we would like to see a battery rebate for the solar and electric car industries.

Other considerations possible alternative energy sources like a Generator or Wind Turbine which can be used during the evening reducing battery bank size or keep the bank topped up.


View a complete range of  Lithium batteries that will work with or without a solar system. Lithium Batteries from the worlds best manufacturers all offering local Warranty and Support.

Secure Investment with a strong 10 Year manufacturers warranty on all of the products listed.

LG Chemical

Optimised Solution for Energy Saving & High-quality Power Energy Storage System (ESS) stores electric energy and utilise them for later consumption. It is purposed to improve energy efficiency, by enhancing the quality of renewable energy that results in stabilisation of power a supply system. LG Chem provides the most optimal energy solution for the users using our state-of-the-art energy storage system with a long lifespan and a top-notch quality.

Single Phase & 3 Phase Battery Inverters

SMA Battery Storage


With the Sunny Boy Storage, customers benefit from a markedly reduced system and installation costs and flexible applications. Thanks to AC coupling, the battery inverter can be installed or expanded in any location, at any time, regardless of whether or not there is already a PV system installed. The Sunny Boy Storage is a true jack-of-all-trades, one that uses high-voltage technology to make it cost-efficient and lightweight. It also uses just a few components, because the most important functions for intelligent battery management are already integrated. This makes the Sunny Boy Storage the ideal choice for putting more sun in your electricity supply.

Fronius Storage Solutions

Fronius Symo Hybrid 5kW Inverter / Charger
This clever All In 1 Hybrid Can be installed without a battery and work like any standard grid-connected solar Inverter until you are ready to add battery capacity at a  later date OR Simply replaces your existing Inverter with up to 7kW of solar array plugging directly in, then just add a battery.

Fronius Hybrid connects directly to Fronius or LG Battery supplying power to your home day & night

From a simple inverter, one minute, the battery and emergency power function can be added with ease to create a comprehensive storage solution. The result: the sun by day, the sun by night and sun during power outages

Fronius Hybrid works with Fronius + LG Battery

Solarwatt Storage Solutions

MYRESERVE 500 – The latest generation in battery storage
Also for aesthetic purposes – the SOLARWATT MyReserve 500. Modern design in a high-gloss look with space-saving wall installation make MyReserve an eye-catcher and underline the claim of a trend-setting, reliable and user-oriented storage system.

Thanks to the outstanding design quality, MyReserve was distinguished with the German Design Award 2016. The battery storage system was already distinguished with the Intersolar Europe 2015 EES Award as an outstanding and innovative solution for energy storage.

Until recently, PV battery storage systems were too expensive and not profitable. The MyReserve 500 storage system from SOLARWATT is the first affordable storage system for private households. Now storing solar power and consuming it internally finally pays off – MyReserve makes it possible:

  • Use solar power when you need it
  • Significant increase in internal consumption
  • Increased independence
  • Noticeable reduction in your power bill
  • Personal energy revolution
  • Outstanding efficiency MyReserve is achieved with the highest battery efficiency of 99.2 % and the highest round-trip efficiency of 96 % in best point.

MyReserve can adapt to any system and family. Expansion is possible in 2.2 kWh increments thanks to the modular design and the battery storage system is compatible with all common inverter types.

SOLARWATT MyReserve fulfills the safety guidelines for lithium-ion battery storage systems completely. The battery storage system is also protected from digital intrusion and meets the highest safety standards for transport, operation and occupational safety.

The modular design and easy handling make plug & play installation possible for one person. MyReserve is quickly connected and ready to use right away.
The SOLARWATT KomplettSchutz is the all-round worry-free insurance for your MyReserve – free of charge for the first 5 years. You also receive a 10 year performance warranty on the battery module.



SOLARWATT expands its flexible battery, MyReserve Matrix: Each battery module now holds ten percent more energy – while staying small. By using new, more powerful battery cells the storage capacity of a single battery module has increased from 2.2 kWh to 2.4 kWh. The MyReserve control unit (MyReserve Command) and five battery modules can now hold a maximum capacity of 12 instead of the previous 11 kWh. The MyReserve Packs with the new battery cells are fully backwards compatible with all previous versions of the battery.

“With these new battery cells, which can handle more than double[expand title=”Read More”]the charge / discharge cycles as before, SOLARWATT is preparing for future use cases which require many charging and discharging cycles per day. The number of cycles the cells can reach is so high that it no longer plays a role in the overall service life of the battery,” says Dr. Olaf Wollersheim, Managing Director of the SOLARWATT INNOVATION Research and Development Center. When deliveries started of the MyReserve Matrix in summer 2017, the maximum cycle count was removed from the guarantee conditions of the MyReserve Matrix battery. “The question of how many charge / discharge cycles a battery goes through is, in our view, a topic of yesteryear. An appropriately designed battery should reach the end of its service life in terms of calendar aging and not in terms of cycle counts.” Wollersheim continues.

In order for the battery to last a long time, calendar aging must be delayed as long as possible. This is the task of an intelligent battery management system (BMS). SOLARWATT batteries have a sophisticated BMS that captures and monitors scores of data each second. Each line of the software used was programmed by SOLARWATT engineers themselves. “We are the only manufacturer in Europe who develops and manufactures both the batteries and the power electronics themselves. Thanks to this know-how, MyReserve batteries have received numerous awards for their safety and efficiency,” says Wollersheim.

Selectronic Storage Solutions

Best in Class: Meeting High Energy Demand Requirements
Manufactured in Melbourne – 50 Years On
Selectronic SP Pro GO Series Battery Inverter Charger

System Example: Large power user
This is as good as it gets as far as quality and future proofing a household’s power demand can get.

With 14,5kW of AC Coupled Solar, this system is big enough to run the entire households daytime energy demand including a 15kW Ducted Air conditioning system also leaving enough power to charge an electric vehicle and charge a battery bank for night time consumption.

Also, The Selectronic SP Pro Go Series battery inverter can send up to 4.9kW of unused power back to the grid for a feed in Tariff

AC Coupling is now possible with Fronius Primo Certified Inverters, by adding up to x2 times the capacity of Installed SP Pro Go Series Battery Inverter[/expand]

Solutions Tailored to Your Needs

  • During Day Light Hours Draw Power Direct of your Solar Panels with Grid Tie Inverters
  • Store any Excess Energy not being used Into a battery bank then drawback of it in the evening
  • Sell any Excess Energy to the Grid above self-consumption and battery storage
  • Grid Back-UP Charge batteries with Off-Peak Power if there is not enough sun to do the job. TOU – Time Of Use metering required
  • If the Grid is down you will not be out of power, draw power directly from the battery bank or Grid Tie inverters.
  • Generator Back-UP is also an additional option to maintain the constant supply to house & Industry loads, above storage and inverter capability also In times of extended Grid outages.
  • 2 & 3 Phase power supply adaptability

This is just a few of SP Pro GO’s Capabilities
Selectronic Australia smart energy solutions made easy!