10-40kW
SUNGROW SBHACC | Accessory Kit For High Voltage LFP Modular Batteries
$1,507.00
$1,370.00 ex. GST
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Solar panels generate the most power between roughly 10am and 3pm. In most Australian homes, that production peak does not match the household load peak, which falls in the morning and evening. A solar battery captures the surplus and releases it later, so more of your generated energy is consumed on site instead of being exported to the grid for a low feed-in tariff.
The three core jobs of a solar battery are simple. Store the surplus generated during daylight hours. Supply that stored energy back to the home at night or during peak grid pricing. Reduce dependence on grid-supplied electricity overall.
A battery sits between your solar inverter, your switchboard, and the grid. Charging happens directly from the DC output of the panels (in DC-coupled systems) or from the AC side via an additional inverter (in AC-coupled retrofits). Discharge is managed by the inverter and a battery management system (BMS), which monitors cell voltage, temperature, and state of charge to keep the battery within safe operating limits.
For a typical residential install, the components include the battery itself, a hybrid or battery inverter, isolation switches, and DC and AC solar cables. Protection devices include solar circuit breakers and a dedicated DC isolator.
Three setup types cover most installations. A grid-connected battery sits behind the meter and supplements grid supply without disconnecting from it. A hybrid system uses a hybrid inverter that handles both solar and battery in one unit, with the option to provide backup during outages. An off-grid system has no grid connection at all, and the battery bank is sized to carry the full household load through the night and through several days of poor weather.
All battery installations must be carried out by a licensed electrician. Lithium battery installations also require accreditation under the Clean Energy Council battery install scheme. The work covers cable sizing, isolator placement, label and signage compliance, and physical mounting against fire and access requirements set out in AS/NZS 5139 (battery installation) and AS/NZS 3000:2018 (general wiring rules).
Three drivers come up consistently. Backup power during grid outages is the first. Higher self-consumption is the second: using more of what the panels produce instead of exporting at low feed-in rates. Lower long-term bills is the third, as time-of-use tariffs widen the gap between peak and off-peak rates.
Nameplate capacity is the total energy the battery can store, measured in kilowatt hours (kWh). Usable capacity is the portion you can actually draw before the BMS shuts the battery down to protect the cells. Always compare batteries on usable capacity, not nameplate. A 13.5 kWh battery with 100% usable capacity gives you the same energy as a 15 kWh battery rated to 90% depth of discharge.
Depth of discharge is the percentage of the battery you can drain in a normal cycle. Lithium iron phosphate (LiFePO4) chemistries typically allow 95 to 100% DoD without affecting warranty. Lead-acid batteries are usually rated to 50% DoD, which is why a 200 Ah lead-acid bank delivers far less usable energy than the headline figure suggests.
Round-trip efficiency is the percentage of energy you get out for every kWh you put in. Energy is lost as heat in both charge and discharge, and again in the inverter conversion. Modern lithium batteries paired with a quality hybrid inverter sit between 90% and 95% round-trip. Lead-acid systems sit around 80%. The lower the figure, the more solar generation you need to deliver the same usable output.
Cycle life is the number of full charge-discharge cycles a battery can complete before its usable capacity drops to a defined threshold, often 60 to 80% of original. Quality LiFePO4 batteries are rated for 6,000 to 10,000 cycles at high DoD. At one full cycle per day, that translates to 16 to 27 years of theoretical life. Real-world life is shorter due to temperature, partial cycling, and manufacturer-specific warranty conditions.
When comparing two batteries on paper, divide warranty energy throughput (kWh) by upfront cost ($). The winner is the battery delivering more guaranteed lifetime energy per dollar. This single calculation cuts through marketing claims about cycle counts and DoD percentages.
Standard lithium-ion (NMC, NCA chemistries) offers high energy density, meaning more kWh in a smaller and lighter package. Used widely in earlier-generation residential batteries. Now being displaced in stationary storage by LiFePO4 due to thermal stability concerns.
LiFePO4 is now the dominant chemistry for residential and commercial solar storage. Lower energy density than NMC but significantly safer (no thermal runaway risk under normal abuse conditions), longer cycle life, and better tolerance for high DoD. Most major brands sold in Australia, including Sungrow, GoodWe, BYD, and Alpha ESS, use LiFePO4 cells.
Sealed AGM and gel lead-acid batteries are still used in remote off-grid applications where upfront cost matters more than cycle life or footprint. Heavy, low DoD, short cycle life compared to lithium. Mostly being phased out of new installations except in budget-driven off-grid scenarios.
| Feature | LiFePO4 | Standard Li-ion (NMC) | Lead-Acid (AGM/Gel) |
|---|---|---|---|
| Typical DoD | 95-100% | 80-90% | 50% |
| Cycle life (to 80%) | 6,000-10,000 | 3,000-5,000 | 500-1,500 |
| Round-trip efficiency | 92-95% | 90-93% | 75-85% |
| Thermal stability | High | Moderate | High |
| Energy density (Wh/kg) | 90-160 | 150-250 | 30-50 |
| Typical use today | Residential, commercial | Older systems, EVs | Budget off-grid |
Pull 12 months of electricity data from your retailer portal. Identify daily average consumption (kWh per day), evening load (4pm to 10pm), and overnight base load. Most Australian homes use 15 to 25 kWh per day total, with 6 to 12 kWh of that falling in the evening peak. The battery should comfortably cover that evening window without dropping below 20% state of charge in normal operation.
The battery is only useful if there is genuine surplus to store. As a rough sizing rule, the daily battery throughput should not exceed about 30% of average daily solar generation. A 6.6 kW solar array in southeast Queensland produces around 25 to 28 kWh per day on average, supporting a battery that cycles 8 to 10 kWh daily.
Decide what you need to run during an outage. Whole-of-house backup is more expensive (requires a hybrid inverter with backup port and an automatic transfer switch) than essential-circuits backup (lights, fridge, internet, one or two power circuits). Sizing for whole-of-house backup typically pushes battery capacity 50 to 100% above what's needed for daily cycling.
The Australian market has consolidated around a small group of brands offering modular, scalable LiFePO4 systems with strong local warranty support. Buyers in 2026 should weigh four things. First, confirmed local service network. Second, federal battery rebate eligibility under the Cheaper Home Batteries Program (launched July 2024). Third, CEC-listed installer availability in your area. Fourth, inverter compatibility with any existing solar PV system.
If this is your first battery, prioritise simplicity. A modular LiFePO4 system from a single brand (battery and inverter both from Sungrow, GoodWe, or SolaX, for example) avoids compatibility headaches and gives you one warranty contact. Modular systems also let you start with a smaller capacity and add modules later as your needs grow.
Installed solar battery prices in Australia have fallen sharply since the federal Cheaper Home Batteries Program took effect. As a guide for budget planning (not specific product pricing), residential systems in the 10 to 13 kWh range are now commonly quoted in the mid-single-digit thousands fully installed. The exact figure depends on inverter compatibility, switchboard work, and location. Larger 16 to 27 kWh systems cost proportionally more.
Smaller modular batteries (5 to 6 kWh) and DIY-style 48V LiFePO4 packs targeted at off-grid users now sit in the sub-$5000 bracket on a hardware-only basis. Installation, inverter, and switchboard work are additional. Buyers focused on lowest upfront price should still confirm CEC listing for rebate eligibility before purchase.
The federal Cheaper Home Batteries Program (effective July 2024) provides a discount of around 30% off the upfront cost of installed battery systems between roughly 5 kWh and 50 kWh in usable capacity. Several state-level programs (NSW, Victoria, ACT) stack on top of the federal discount. Eligibility requires CEC-listed equipment and an accredited installer.
Payback varies sharply with electricity tariff structure, solar system size, and household load shape. A typical urban home on a time-of-use tariff, with a 6.6 to 10 kW solar array and a 10 kWh battery, now sees payback in the 6 to 9 year range with the federal rebate. Battery warranty periods are typically 10 years.
Cheapest is rarely best value. The decisive figure is dollars per warranted lifetime kWh of throughput. A budget battery rated for 4,000 cycles at 80% DoD delivers far less guaranteed energy than a premium LiFePO4 unit rated for 8,000 cycles at 95% DoD, even when the upfront price gap is significant. Run that calculation before signing.
Pricing note: This page deliberately does not list product prices. Solar battery prices change frequently with rebate adjustments, exchange rate movement, and supplier promotions. For current pricing on any product in this category, browse the live category listing.
A petrol or diesel generator delivers backup power on demand but does nothing for daily energy bills. It needs fuel storage, regular maintenance, and produces noise and emissions. A solar battery delivers backup plus daily bill savings, runs silently, and has no fuel logistics. Generators still make sense as a deep-backup option in remote off-grid sites where extended overcast weather can drain a battery bank.
Grid-only is the lowest-upfront-cost option but offers zero protection from outages and exposes you fully to retail tariff increases. Solar without battery captures cheap daytime generation but exports surplus at low feed-in rates and offers no overnight or outage benefit. Solar + battery pairs daytime generation with stored evening supply, lifting self-consumption from typical 30 to 40% (solar only) up to 70 to 90% with a correctly sized battery.
Off-grid sizing is fundamentally different from grid-connected. The battery has to carry the full load through every night and every cloudy stretch, with no grid fallback. Standard sizing rules use three to five days of autonomy at average daily consumption. A 25 kWh per day off-grid household typically needs a 75 to 125 kWh battery bank, paired with oversized solar generation and often a backup generator for extended overcast periods.
LiFePO4 is now the dominant chemistry in off-grid because of its high cycle life and high DoD tolerance. Victron Energy components remain a popular choice for the inverter, charger, and monitoring side of off-grid systems thanks to broad ecosystem compatibility.
Pre-engineered battery kits bundle battery modules, BMS, inverter, and cables in a matched package, removing most of the compatibility risk. This is the safer route for first-time off-grid builders. Custom builds give you flexibility but require deeper sizing knowledge and component matching expertise.
A battery warranty has three components worth checking: years of cover (typically 10), guaranteed energy throughput (typically 36,000 to 80,000 kWh over the warranty period), and end-of-warranty capacity guarantee (typically 60 to 70% of original). Read all three. A 10-year warranty with low throughput is weaker than an 8-year warranty with high throughput.
If you have an existing solar PV system, the new battery must be compatible with your existing inverter, or you'll need to add a separate AC-coupled battery inverter. DC-coupled retrofits often require replacing the entire inverter. Get this confirmed in writing before paying a deposit.
Lithium battery installations in Australia must comply with AS/NZS 5139, which covers physical placement, exclusion zones, signage, ventilation, and ingress protection requirements for the battery enclosure. Indoor installation is allowed but with strict zoning rules around sleeping areas, exits, and other appliances. Outdoor installation needs adequate weather protection and an enclosure with the right IP rating. Your installer is responsible for compliance.
Local presence matters more than headline brand recognition. A brand with a working Australian service team and Australian-warranted parts is worth more than an imported budget product with no local support pathway. Brands with established Australian distribution include Tesla, Fronius, and the major Asian inverter and battery manufacturers (Sungrow, GoodWe, SolaX).
Time-shifting heavy loads (hot water, dishwasher, washing machine, EV charging) into peak solar hours captures more direct generation and leaves the battery free for evening use. A solar diverter such as a CATCH Power relay can automate this by sending excess solar to the hot water element first, then storing whatever is left over in the battery.
Every modern battery ships with a monitoring app that tracks production, consumption, battery state of charge, and grid import or export in real time. Use it. The data lets you spot under-performing strings, identify creeping standby loads, and adjust battery operating modes seasonally. Without monitoring, problems can run for months before they become visible on a bill.
LiFePO4 batteries are largely maintenance-free at the cell level. Periodic checks should cover: inverter firmware updates, ventilation around the battery enclosure, cable terminations and isolator function, and a documented system test of any backup function at least annually. A licensed electrician should inspect the system every 3 to 5 years.
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I bought 2 modules to upgrade my existing Sungrow battery. I got them delivered within 2 days. Both modules were a tad over 4 months old. Installation was super easy, I just needed to follow Sungrow's instructions and discharge my existing battery to 17%. After that I just shut the system down, added the new modules and powered the system up. The battery reconfigured itself automatically.
The Catchpower Solar relay - Catch Control was recently fitted to my newly installed solar / Tesla powerwall system. Straight forward to fit and setup and operates very well to control a hot water system using excess solar energy through the day and also has the ability to boost and time control as well. Works as expected.
I recently purchased a GoodWe inverter online and was thoroughly impressed with both the product and service. The inverter is of exceptional quality, living up to its high standards, and was delivered promptly without any issues. Its performance has exceeded my expectations, offering efficient and reliable energy management.
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Browse Solar Batteries → Get Expert Advice →No. Solar batteries operate quietly and are suitable for residential environments.
Solar batteries are available from Sparky Direct, with pickup available from 15 Alta Road, Caboolture QLD 4510.
No. Solar batteries are available for pickup only from Sparky Direct at 15 Alta Road, Caboolture QLD 4510.
Yes. Solar batteries are suitable for new solar installations and system upgrades.
Yes. Solar batteries are supplied with manufacturer warranties, with terms varying by product.
Consider storage capacity, system compatibility, warranty, installation requirements, and energy usage patterns.
Solar batteries help maximise renewable energy use, reducing reliance on fossil fuel-generated electricity.
Yes. Solar batteries operate year-round, storing energy whenever solar generation is available.
Yes. They can still charge when solar panels produce power, though at reduced levels.
Yes. Solar batteries are available in different capacities to suit small and large households.
Yes. Installation location depends on the battery design and manufacturer specifications.
Most modern solar batteries require minimal maintenance once installed.
Solar battery lifespan varies by model and usage, with many designed for long-term residential use.
A solar battery stores electricity generated by a solar power system so it can be used later, such as at night or during power outages.
Yes. Storing and using solar energy can help reduce energy drawn from the grid.
A solar battery allows you to use more of your own solar energy and reduce reliance on grid electricity.
Yes. Solar batteries must be installed by licensed electricians or accredited solar professionals.
Yes. When compliant products are installed by licensed professionals, solar batteries are designed to operate safely.
Storage capacity varies by model and is measured in kilowatt-hours, with different sizes available to suit household needs.
Some solar battery systems can provide backup power during outages, depending on system configuration and installation.
Yes. Many solar batteries can be added to existing solar systems, subject to compatibility and system assessment.
Common types include lithium-ion batteries and other advanced energy storage technologies designed for home and commercial use.
Yes. Solar batteries are widely used in Australian residential properties to improve energy independence and efficiency.
Solar batteries supplied in Australia are designed to meet relevant AS/NZS electrical and safety standards when installed correctly.
A solar battery stores excess solar energy produced during the day and releases it when solar generation is low or unavailable.
