Meritsun, a Chinese battery manufacturer, has unveiled a new lithium-ion storage system for residential solar arrays.
“Through surveys and customer feedback, we found that, due to long-term power outages, users have higher requirements for battery capacity to cope with the predicament of unstable power supply or even being unable to connect to the grid,” the company said in a statement. “In order to meet the needs of these customers, MeritSun launched the Powerwall 15KWH lithium battery.”
The battery measures 600 mm x 1100 mm x 230 mm and weighs 165 kg. The device has a storage capacity of 15 kWh, a rated capacity of 300 Ah, and a voltage of 48 V. It also features a depth-of-discharge (DoD) of 95% and can purportedly operate for more than 8,000 cycles. The lithium-ion system uses LiFePO4 as the cathode material and has an ambient operating temperature range of -15 C to 55 C.
The Guangzhou-based manufacturer offers a 12-year warranty and says the storage system can be stacked in series to reach larger capacities. The battery also features a patented built-in battery management system.
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: editors@pv-magazine.com.
Price? Compatibility with hybrid inverters??? This article without that information is just another masked ad. There are thousands of manufacturers in china making similar batteries. I dont need another ad.
Hi Emiliano
What’s the difference between storage capacity and rated capacity?
If you assume a 48V pack has a working voltage of 50V as a lead acid array would, then 300Ah works out to 15kWh.
Also confused by stacking in series. Many solar charger/inverters are designed to work at nominal 48V DC, so a parallel connection would seem likely to maintain the 48V requirement.
Or do these power walls have built-in charge controllers and inverters. In that case they would likely have a coupling arrangement for both charging and output.
Chris
Great questions from you Chris. Honestly, I was just about to ask the writer same questions before I saw yours.
Now, over to you Emiliano. Please, clarify yourself because you’ve got these points muddled up.
I wonder what the maximum sustained discharge rate is.
It is good to have but Just wanted to know the cut in cut out of the battery charging cycle as no of charges define the life of the battery .
Time period required for complete charging of the battery which determines the maximum range of charging cut in and cut off and reduces the charging cycles.