If you are getting quotes for a solar and battery system in Perth, there is a good chance all three of these batteries have come up. Tesla Powerwall 3, Sungrow SBH, and SigEnergy SigenStor are three of the most popular home batteries Perth homeowners choose from our range, and Positive Energy Solutions installs all three.
All three are quality batteries from established makers. All three use lithium iron phosphate (LFP) chemistry, carry a 10-year warranty, and suit Perth homes. The question is not which is best overall. It is which is the right fit for your home, your energy use, and your plans.
This post compares the three side by side, explains where each one leads, and helps you match the battery to your situation.
Specifications at a Glance
Specifications based on published manufacturer data. WA-specific installation rules may affect maximum capacity. Note: round-trip efficiency figures are not directly comparable — Tesla’s figure is measured AC-to-AC (including inverter conversion losses in both directions), while Sungrow and SigEnergy figures typically reflect battery-only or DC-to-DC efficiency. Direct comparison overstates the gap.
Tesla Powerwall 3
The Tesla Powerwall 3 is the most integrated of the three. It combines the solar inverter and battery in a single unit, so there is no need for a separate hybrid inverter. Each Powerwall 3 stores 13.5 kWh and delivers up to 11.04 kW of continuous power, with up to four units stackable for 54 kWh total. It accepts up to 20 kW of solar input across six MPPTs, so it works well with larger arrays and multiple roof orientations.
The Powerwall 3 makes Tesla’s strongest case for simplicity. One unit on the wall handles inverter and battery functions, connects to the Tesla app, and manages energy automatically. The installation footprint is smaller than a separate inverter and battery combination, and the system has a clear, well-known support structure through Tesla’s controlled installer network.
Whole-home backup is available on the single-phase 10 kW setting. During a grid outage, the Powerwall 3 can power the entire home up to its 11.04 kW continuous output limit. On three-phase properties or the 5 kW setting, backup covers essential circuits only.
Where Powerwall 3 leads
- All-in-one design — no separate hybrid inverter required
- 11.04 kW continuous output — strong whole-home backup capability on the single-phase 10 kW setting
- Accepts up to 20 kW solar input across 6 MPPTs — suited to large or multi-face arrays
- Unlimited cycle warranty when not participating in VPP — no cycle count limit applies to the battery warranty
- Tesla ecosystem — app, monitoring, and future compatibility with Tesla EVs and energy products
- Controlled installer network — installation quality is tightly managed by Tesla
Where Powerwall 3 has limitations
- 13.5 kWh per unit — if you need more storage, you need additional units at additional cost
- Round-trip efficiency (89%, AC-to-AC) is lower than Sungrow’s 96–97%
- Single-phase inverter only — not natively three-phase compatible; Powerwall 3P expected late 2026
- No V2X capability — EV charging requires a separate Wall Connector
Sungrow SBH
Sungrow is the world’s largest inverter maker and one of the most widely used solar brands in Australia. The SBH (Stackable Battery High voltage) is Sungrow’s residential battery, built to work with the SH series hybrid inverters: the SH10RS for single phase, and the SH10T and SH15T for three phase. On single phase, the SH10RS supports whole-home backup. On three phase, whole-home backup needs the SH15T (15 kW). The SH10T supports partial backup only.
The SBH is a modular battery that stacks in 5 kWh increments, so system capacity can be sized precisely. On single phase, the SBH is capped at 30 kWh total. On three phase, each stack scales up to 40 kWh and up to 3 stacks can be installed. The SBH’s standout spec is round-trip efficiency. At 96-97%, it turns more of your solar generation into usable stored energy than either of the other two options. Over years of daily cycling, that efficiency difference adds up to real savings.
Sungrow’s Australian track record is long and well-established. Their inverters are among the most common in the country, and their warranty and service processes are proven. For homeowners who value a maker with deep Australian roots and extensive local service support, Sungrow is a strong choice.
Where Sungrow SBH leads
- 96–97% round-trip efficiency — the highest of the three, meaning more of your solar generation is recovered as usable energy
- Modular 5 kWh increments — size the system precisely to your needs
- Long Australian market presence — proven warranty and service track record
- Sungrow Platinum Partner status held by Positive Energy Solutions — direct manufacturer relationship and support escalation
- Compatible with Sungrow inverters if you already have one installed
Where Sungrow SBH has limitations
- Requires a separate Sungrow hybrid inverter — more components than the Tesla all-in-one
- No manufacturer-published AU cycle-count rating (10-yr/70%-retention warranty, same structure as SigEnergy)
- No V2X capability
SigEnergy SigenStor
SigEnergy is a newer name in the Australian market, but the SigenStor has drawn a lot of attention since its launch. Its headline features are LFP cells rated to 10,000 cycles by the cell maker (not a SigEnergy system-level warranty figure), the highest cell-level cycle rating of the three, and an optional bidirectional DC EV charger that opens the path to V2X (Vehicle-to-Everything) capability. Full V2X function is currently in development and being trialled in Australia. The technology is progressing but is not yet a mainstream, fully supported feature. Compatible EV support in the Australian market is also still developing.
The SigenStor uses modular BAT-6.0 and BAT-10.0 battery units that stack to build the capacity you need. AI-driven energy management is built into the system, automatically choosing when to charge and discharge based on tariffs, solar generation, and usage patterns. For homeowners with complex energy needs, such as EVs, pool pumps, air-conditioning, and high appliance loads, the AI management layer adds real value.
SigEnergy’s Australian market presence is shorter than Tesla’s or Sungrow’s. The product performance data is strong and Australian uptake has been fast. However, the long-term Australian warranty track record is still being built compared to more established brands. Positive Energy Solutions monitors all installed systems through Omnidian, which gives an independent layer of performance oversight regardless of the battery brand.
Where SigEnergy SigenStor leads
- All-in-one integrated design — inverter, battery, and energy management in a single system; no separate hybrid inverter required
- LFP cells rated to 10,000 cycles at cell level — the SigenStor warranty is throughput-based over 10 years, like the other two, but the underlying cell quality is high
- Optional DC bidirectional EV charger — V2X capability in development; trial programmes underway in Australia
- AI energy management — automated optimisation of charge/discharge based on tariffs and usage patterns
- Modular design — scalable from smaller starting capacity up to larger configurations
- Strong SolarQuotes Installers’ Choice recognition — widely regarded by Australian installers
Where SigEnergy SigenStor has limitations
- Shorter Australian market history than Tesla or Sungrow — long-term warranty track record is still being established
- Round-trip efficiency (93–95%) is good but below Sungrow’s 96–97%
- V2X requires a compatible EV — not all EVs currently support bidirectional charging in Australia
Which Battery Is Right for You?
This guide reflects general fit based on common Perth homeowner profiles. Your specific roof, connection, energy use, and future plans should all shape the final choice. A Positive Energy Solutions consultant will discuss your situation in detail before recommending a system.
What All Three Have in Common
Despite their differences, all three batteries share the same fundamentals that matter most for a Perth home installation:
- LFP chemistry — lithium iron phosphate is the safest and most stable battery chemistry, with no thermal runaway risk and long cycle life inherent to the chemistry
- 10-year warranty — all three warrant the battery for 10 years with minimum 70% capacity retention (or, for Sungrow and SigEnergy, a per-model throughput cap). Sungrow and SigEnergy structure their AU warranty around capacity/throughput rather than a published cycle count — SigEnergy’s 10,000-cycle figure is a cell-manufacturer rating, not a system warranty term; Tesla offers unlimited cycles when not in a VPP
- Grid-compliant for WA — all three meet Western Power’s SWIS grid connection requirements
- Synergy Battery Rewards compatible — all three are eligible for VPP participation through the Synergy Battery Rewards program, providing activation credits when the grid needs support
- Available through Positive Energy Solutions — all three are installed by us with the same 10-year workmanship warranty and Omnidian performance monitoring on every system
How Positive Energy Solutions Approaches Battery Selection
Positive Energy Solutions does not have a preferred battery brand for every customer. The right battery depends on your home, your energy use, whether you have or plan to get an EV, your connection type, and your priorities. A Positive Energy Solutions consultant will review all of these factors with you as part of your quote and recommend the battery, and inverter combination, that fits your specific situation.
Because Positive Energy Solutions installs all three systems and has hands-on experience with each, the recommendation comes from real knowledge of how each battery performs in Perth conditions, not from stocking a single option.
Request Your Quote in Perth
Positive Energy Solutions provides no-obligation solar and battery quotes for Perth homeowners. Whether you know which battery you want or want guidance on the right fit for your home, visit our showroom or request a quote online. Every system includes a 10-year workmanship warranty and Omnidian monitoring from day one.
Related guides
- SigenStor Perth 2026: The All-in-One Solar Battery System Explained
- How to Right-Size a Solar Battery: Sungrow SBR vs SBH Explained
- SigEnergy SigenStor Backup Power for Perth Homes
- PES Is a Sungrow Platinum Partner in Perth: What That Means for Your Solar and Battery System
Frequently Asked Questions
Which battery is the most efficient?
Sungrow SBH publishes a round-trip efficiency of 96-97%, and SigEnergy SigenStor 93-95%. Tesla Powerwall 3 is 89%. However, these figures are not directly comparable. Tesla’s efficiency is measured AC-to-AC, meaning it includes the inverter conversion losses in both the charge and discharge direction. Sungrow and SigEnergy figures typically reflect battery or DC-level efficiency, which does not capture the same losses. The real-world gap between the three is smaller than the headline numbers suggest. All three are efficient batteries by any practical measure.
Which battery lasts the longest?
All three batteries carry a 10-year warranty with 70% capacity retention, but the way cycle life is expressed differs. Tesla Powerwall 3 offers an unlimited cycle warranty when not taking part in a VPP. There is no cycle count limit in that set-up, which is a genuine point of difference. Sungrow SBH’s Australian warranty is capacity/throughput-based (70% retention at 10 years, or a per-model throughput cap). Sungrow does not publish an AU cycle-count figure. SigEnergy SigenStor’s warranty is likewise throughput-based over 10 years. The underlying LFP cells are rated to 10,000 cycles at a cell level, though this is a cell maker specification rather than a system-level warranty figure. In practical residential use, all three are designed to comfortably outlast their 10-year warranty periods.
Can I use my EV as a backup battery?
Only with the SigEnergy SigenStor and a compatible EV. SigenStor’s built-in bidirectional DC charger supports V2X (Vehicle-to-Everything), letting a compatible electric vehicle send power into the home during a grid outage. This is the only one of the three batteries that currently offers V2X. Tesla Powerwall 3 does not currently support V2X, and Sungrow SBH does not include this feature.
Which battery gives the best whole-home backup?
Tesla Powerwall 3 has the strongest whole-home backup spec at 11.04 kW continuous output, enough to run most Perth homes fully during an outage, including air-conditioning. On single phase, all three batteries support whole-home backup with a 10 kW inverter. On three phase, the picture changes: Sungrow needs the SH15T (15 kW) for whole-home backup, and the SH10T supports partial backup only. SigEnergy similarly needs the 15 kW model for whole-home three-phase backup. Tesla Powerwall 3 is single-phase only, so whole-home backup on three-phase connections is not currently supported.
Does Positive Energy Solutions recommend one battery over the others?
No. Positive Energy Solutions recommends the battery that fits your specific situation. All three are quality products from reputable makers, and all three are installed by us with the same 10-year workmanship warranty and Omnidian monitoring. The right choice depends on your connection type, energy profile, EV situation, and priorities. A Positive Energy Solutions consultant will work through these with you as part of the quoting process.
Are all three eligible for the WA battery rebate?
Sungrow SBH and SigEnergy SigenStor are eligible for both the federal Cheaper Home Batteries Program (CHBP) and the WA Residential Battery Scheme, which can be stacked for greater savings. Tesla Powerwall 3 is eligible for the federal CHBP but is not currently eligible for the WA Residential Battery Scheme. Positive Energy Solutions applies all applicable rebates directly to your quote, so the price you see already reflects what you will pay after incentives, and will advise you on which schemes apply to your chosen battery.
About the Author
Jason Wiktorowicz
Sales Manager, Positive Energy Solutions | Perth, WA
Jason has been at the centre of Western Australia’s energy transition for over a decade. As Orchestration Lead on Project Symphony — WA’s largest virtual power plant pilot — and Stream Lead on Project Encore, he worked directly with AEMO, Western Power and Energy Policy WA to shape how distributed energy resources connect and operate on the SWIS. That work included developing and rolling out CSIP-AUS, now mandatory for all new WA grid connections. He also led Emergency Solar Management (ESM), the first program of its kind in WA, VPP for Schools (VPP4S), which provided direct market benefits through Supplementary Reserve Capacity, and REBAR, the WA Residential Battery Rebate scheme.
His earlier career spanned Synergy, Infinite Energy and Curtin University’s Sustainability Policy Institute, where he co-authored peer-reviewed research on net-zero urban precincts, solar integration and peer-to-peer energy trading, published in the journal Urban Planning in 2018.
At Positive Energy Solutions, Jason leads sales with a focus on system design accuracy and long-term performance. Positive Energy Solutions installs solar and battery systems, EV chargers and heat pumps, and holds partner accreditations with Fronius, SigEnergy, iStore and SunPower. Connect with him on LinkedIn.
