Na+ Casa

Last verified 2026-10-06.

• UNIGRID describes Na+ Casa as a residential battery built on its sodium chromium oxide (NCO) sodium-ion chemistry.
• In its July 2026 release UNIGRID said the first units had been installed in homes across Europe, with US residential installations expected by the end of 2026 once additional compliance requirements are completed.
• An explicit continuous power rating, system round-trip efficiency, governing warranty terms and an applicable certification listing remain unresolved in the official sources reviewed on 6 October 2026. The maker-linked Na+ Casa brochure adds system specifications and certification claims, but those four evidence gates still prevent scoring this record. This bounded review does not establish that the documents or capabilities do not exist.
• The figure of more than 10,000 cycles on the maker's 48V residential listing and the 25 year operational lifespan in the release are the maker's own claims, and neither source presents them as warranty terms.
• The release prints the name as Na+Casa while UNIGRID's website prints Na+ Casa, and this record is not joined to any other sodium-ion record.
• Legal manufacturer as printed: UNIGRID Inc.
• The current maker products page links a two-page Na+ Casa brochure. Page 2 lists 16S1P connection, 46.4 V nominal system voltage, a 32-54.4 V voltage range, 50 A standard charging and 50 A standard discharging, with a 200 A pulse. At nominal voltage these currents imply 2.32 kW standard DC power and 9.28 kW pulse DC power (voltage multiplied by current, divided by 1,000). They are arithmetic at nominal voltage, not AC output or an explicit maximum continuous rating across the operating range. The pulse duration and operating conditions are not stated, so a sustained surge rating cannot be inferred.
• The brochure lists 9.25 kWh usable energy, but its inverter lower-cutoff table gives 9.30 kWh at 32 V, 9.10 at 34 V, 8.80 at 36 V, 8.40 at 38 V, 8.10 at 40 V and 7.70 at 42 V. The measurement conditions are not disclosed, and the 9.30 kWh entry differs from the 9.25 kWh headline. Actual accessible energy depends on the inverter cutoff; these values are retained separately without assuming an identical test basis or reconciling the discrepancy.
• The brochure distinguishes charging at -20 to 60 degrees C from discharging at -40 to 60 degrees C. Its passive-cooling and all-weather descriptions do not establish charging below -20 degrees C or full power without derating throughout either range. It gives dimensions of 477 mm wide, 869 mm high and 269 mm deep and a 240 lb system weight. Optional wheels and a back mount are shown; wall mounting requires a concrete surface and is described as unsuitable for drywall.
• The brochure cycle claim is more than 10,000 cycles at 25 degrees C and 100% depth of discharge, without a disclosed capacity-retention endpoint or cycling rate. The 25-year operating-life claim remains separate from warranty obligations. Homepage claims of up to 30,000 cycles at 80% retention concern NCO technology or cells and cannot be substituted for the Na+ Casa system claim.
• The brochure certificates row lists UN38.3, CE and REACH and labels UL9540A, UL9540 and UL1973 pending. No exact-model report, declaration or registry listing was recovered to establish the system approval scope or completion of the pending items. Later homepage and August announcements describe cell-level tests or certification, which do not establish completed Na+ Casa system approval or Australian availability. Zero-fire and no-propagation descriptions remain maker claims within this evidence boundary.
• The 5 August joint announcement attributes round-trip energy efficiency of at least 97.9% to RIT tests of 210 Ah NCO cells. It also reports cell capacity and abuse results, while the 26 August Hyundai programme announcement discusses NCO cell testing. These announcements do not supply a Na+ Casa system round-trip measurement, the original complete laboratory reports or an exact system/BOM join. Adjacent BMS-less rack modules, other cells, Syntropic Tenet and GridSpan configurations cannot supply this product’s power, BMS architecture, efficiency or approval.
• The brochure’s claims of storing up to 90% of daily solar output, reducing peak-demand costs by up to 40%, responding within milliseconds and compatibility with existing inverters lack defined installation, tariff, test or accessory conditions. They do not guarantee those outcomes for a particular home or establish an exact inverter pairing. The July European-installation statement remains attributed to the maker, and its expected US rollout remains conditional on compliance; the August partnership’s planned 2027 deployment programme does not establish Na+ Casa shipment volumes or approvals.

• UNIGRID homepagehttps://unigridbattery.com/

  Prints the residential product name as Na+ Casa, states its sodium chromium oxide (NCO) technology and names UNIGRID Inc. in the copyright line.

• UNIGRID products pagehttps://unigridbattery.com/products/

  Lists the 48V Sodium-Ion Series residential unit with 9.25kWh rated energy and a cycle life claim of more than 10,000 cycles, with no efficiency, power, warranty or certification figures.

• UNIGRID release: UNIGRID Ships First Sodium-Ion Residential Batteries (GlobeNewswire, 8 July 2026)https://www.globenewswire.com/news-release/2026/07/08/3324164/0/en/unigrid-ships-first-sodium-ion-residential-batteries.html

  Official UNIGRID release stating first units are installed in homes across Europe, US installations are expected by end of 2026 pending further compliance, and citing a 25 year operational lifespan.

• UNIGRID maker-linked Na+ Casa two-page brochurehttps://acrobat.adobe.com/id/urn:aaid:sc:US:1c35768d-7f36-4763-bf3b-c722fd2552da

  Both pages visually read in the loaded public Adobe viewer on 6 October 2026, reached from the residential section of the official products page. Page 1 marketing, page 2 system parameters, inverter cutoff table, mounting limits and certification/pending claims. No printed revision/date or document-body hash established.

• UNIGRID and Syntropic cell-testing announcement, 5 August 2026https://www.globenewswire.com/news-release/2026/08/05/3339433/0/en/syntropic-power-and-unigrid-partner-to-bring-independently-validated-sodium-ion-technology-to-north-america.html

  Maker joint release reviewed 6 October. Attributed RIT cell-level measurements and testing, not Na+ Casa system efficiency or exact-model approval; original complete laboratory reports not recovered.

• UNIGRID Hyundai technology-validation announcement, 26 August 2026https://www.globenewswire.com/news-release/2026/08/26/3351415/0/en/unigrid-and-hyundai-motor-group-complete-technology-validation-of-sodium-ion-nco-through-zer01ne-accelerator.html

  Maker release reviewed 6 October. NCO cell testing and prospective BESS development; does not establish Na+ Casa system certification, warranty or performance.