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Both BYD and Sungrow offer modular DC-coupled batteries, which let you adjust capacity by adding or removing modules. Here's what matters when comparing this type of system.
Specifications, pricing and eligibility change over time — always confirm the current details with your installer.
| Where they differ | BYD | Sungrow |
|---|---|---|
| Inverter pairing | Notably flexible: works with inverters from Fronius, SMA, GoodWe, Sungrow, and others. | Works best with Sungrow's own hybrid inverters, though some cross-compatibility exists. |
| Company | A larger company overall (also a major EV manufacturer), with an Australian presence. | Australian headquarters in Sydney, and has been growing its local support infrastructure. |
Modular batteries like those from BYD and Sungrow are built from stackable units, typically 2-8 modules that combine to create your total capacity. You can start smaller and add capacity later, or size the system precisely for your needs.
Both manufacturers use LFP (lithium iron phosphate) chemistry in their modular ranges, which offers long cycle life and good safety characteristics. Both are DC-coupled, meaning they connect to your solar system through a hybrid inverter rather than having their own built-in inverter.
Different manufacturers use different module sizes. This affects how precisely you can match your capacity needs. Smaller modules give more flexibility but may mean more components to install. Larger modules are simpler but offer less granular sizing options.
Look for
With modular systems, power output (how fast the battery can charge or discharge) typically scales with the number of modules. More modules usually means higher maximum power, but the relationship isn't always linear. This matters because:
Ask your installer
DC-coupled batteries need compatible hybrid inverters. Some batteries work with many inverter brands; others are designed primarily for their own brand's inverters. BYD batteries are notably flexible: they work with inverters from Fronius, SMA, GoodWe, Sungrow, and others. Sungrow batteries work best with Sungrow's own hybrid inverters, though some cross-compatibility exists.
This matters if:
One appeal of modular systems is adding capacity later. However, expansion isn't always straightforward.
If you might expand
Both BYD and Sungrow modular batteries are compatible with Synergy's Virtual Power Plant programs. However, specific model eligibility and integration quality can vary. Confirm with your installer that your specific configuration qualifies for the VPP program you're interested in.
Both brands have good installer networks in Perth. The more relevant question is whether your specific installer has experience with the specific system they're quoting. Ask how many they've installed and whether they've encountered any issues.
Both manufacturers have Australian presence. BYD is a larger company overall (they're also a major EV manufacturer). Sungrow has their Australian headquarters in Sydney and has been growing their local support infrastructure. Both offer 10-year warranties on their modular battery ranges.
Rather than asking “which brand is better?”, focus on which specific system configuration best meets your needs and budget.
Both BYD and Sungrow make modular batteries with established track records. Your installer's experience and recommendation, the total installed cost, and how well the system matches your specific requirements matter more than brand preference. Get quotes for comparable configurations from each and compare the complete packages.
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On sale here, but not on the approved-product register, so it earns no rebate.