Finn's Delta Batteries Review & Verdict
Finn Peacock has been a Chartered Electrical Engineer since 1998, and is ex-CSIRO
You don't hear a lot about Delta, but they produce some pretty solid electronics. I was a control engineer in a nuclear power station years ago that used Delta equipment; which is a big vote of confidence in the brand. I still use Delta gear today (currently an EV charger) and I'm confident their home batteries are of high quality.
A couple of drawbacks - guaranteed battery capacity at the end of the 10-year warranty is less than some other SQ-recommended brands; and the same goes for the operating temperature range.
Delta Batteries: Pros & Cons
- Solid construction
- Can be charged from solar when the grid is down
- Mid-range pricing
- Maximum operating temperature (45C) may be a little low for some of Australia's toastier spots.
- NCA battery cell chemistry instead of LiFePO4
- Comparatively low power rating
- Comparatively low battery capacity warranted at 10 years.
About Delta
Founded in the 1970's and headquartered in Taiwan, Delta is probably better known in the solar power space for its inverter products, but it has also moved into home battery storage.
Australian Office Contact Details
Sydney office address: Unit 18/39 Herbert Street, St Leonards NSW 2065
Phone: 02 9479 4200 / 1300 335 823
Melbourne office address: Unit 2, Building A, 18-24 Ricketts Road, Mount Waverley, Victoria 3149
Phone: 03 9543 3720 / 1300 335 823
Company Info
Delta Electronics was founded in Taiwan in 1971 by Bruce Cheng, who was the company's Chairman until 2012. Since that time, Mr. Cheng has served as Delta’s Honorary Chairman.
The company initially began as a manufacturer of television components, but quickly expanded into the broader field of power electronics. In the 1990s, Delta diversified into the renewable energy and industrial automation sectors. The company began producing home energy storage systems in 2017.
Delta has received dozens of internationally recognized design awards over the years for various bits 'n bobs, but they don't do a lot in the way of marketing themselves - the firm is a quiet achiever.
Delta BX 6.3 / 12.6 Batteries
The BX 6.3 AC 100 is a 6.3 kWh capacity battery offering a continuous power rating of 3kW, and can be used in both off-grid and hybrid setups. It has a built-in power meter, is rated IP65 for outdoor use and has an operating temperature range of -10C - 45C.
Delta says its robust design can withstand a 5000 kg shock; although that's obviously something you don't want to test. Samsung 41J (21700) cell packs are used in this battery, which are based on nickel-cobalt-aluminum (NCA) chemistry.
The BX 6.3 can act as a backup source during a blackout situation and can be charged from solar when the grid is down.
If 6.3 kWh capacity and 3kW of power isn't enough, the BX 6.3 can be expanded to 12.6 kWh/4.5 kW with the BX6.3 EX100 expansion module.
If you're considering a Delta battery, bear in mind while the BX 6.3 includes an AC battery inverter, it needs to be paired with AS4777.2.2015 compliant inverter up to 5kw AC single-phase.
Further specifications of Delta's home energy storage solutions can be found on our solar battery comparison table, and the company is currently listed on our chart of approved brands.
Warranty Info
The Delta BX 6.3 AC warranty states the battery shall retain at least 50% of its capacity 10 years from the date of first installation of the product or when it exceeds an energy throughput of 19.8MWh (whichever comes first). It's important to note that a warranty requirement is the battery must not be installed in an area exposed to direct sunlight.
If you're an Australian owner of a Delta home battery, share your thoughts on it by leaving a rating and review.
Delta has 2 solar batteries in our database
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