Battery R2

Last verified 2026-10-06.

• BIWATT's datasheet lists the Battery R2 as a sodium-ion battery: a 4.5 kWh stacked module with a 45 V rated voltage.
• BIWATT's June 2026 release refers to it as the PowerNest R2 and says it has entered commercial delivery across international markets.
• BIWATT's current product warranty names the R2 sodium-ion family and gives five years of hardware coverage, subject to its installation, maintenance, environmental and claim conditions. The full PNR-4.5-02 suffix is not printed in the warranty table; the family join uses the existing official R2 datasheet identity. The product remains unscored because round-trip efficiency and a continuous power rating in kW remain unestablished, and no exact certificate number or listing has been recovered for the CE standards entry.
• The 5,000 cycle figure is marked with an asterisk and is stated only under set test conditions (25±2°C, 0.5C/0.5C, 80% depth of discharge); it is not a warranty term.
• This page is not joined to any other scored or evidence record.
• Shenzhen Biwatt Technology Co., Ltd. and its affiliates are the warrantor. The current maker-linked policy is dated 10 August 2026 in its footer, although the catalogue entry was created on 2 August 2025. It covers R2/R3/R5/I3 sodium-ion batteries for five years; this is hardware/material/workmanship coverage, not a 5,000-cycle, retained-capacity or throughput warranty.
• Commencement is the earlier of on-site installation/activation/registration and retailer invoice or written evidence of delivery to the installation site. If neither date can be determined, commencement is six months after manufacture. The policy gives no explicit sales/delivery effective-date cohort and warns that local distributors may offer a separate warranty; individual or local entitlement is not established by this review.
• The warranty requires a trained installer and compliance with the manual, ventilation and storage conditions. It requires operating ambient temperature between -20 C and +55 C, storage at 0-35 C and specified SOC/maintenance conditions. Equipment within 500 metres of the coast, or installed outdoors without BIWATT-approved outdoor cabinets, is excluded. A technical enclosure rating or lower discharge-temperature claim does not remove those warranty conditions.
• Claims must be made within 30 days of failure, normally through the BIWATT app with requested contact, model/serial, installation/failure, error and troubleshooting information. The policy offers installer/national-office contact if the app route is unavailable. Offline products require claimant-assisted on-site inspection/data collection; remote diagnosis and firmware updates may interrupt operation. No customer, serial or purchase record was queried.
• BIWATT chooses configuration/software correction or replacement/exchange with a new, refurbished, functionally equivalent or superior unit. Repair/replacement coverage lasts for the original remaining term or six months, whichever is longer. Removed hardware becomes BIWATT property, and uncovered claims may incur a handling fee. Transfer is permitted only while the device remains at its original installation location.
• Unless a separate agreement applies, the limited warranty covers necessary hardware material costs and excludes all other costs. Its on-site replacement wording does not establish unconditional labour, freight or removal/reinstallation reimbursement. Lost generation and consequential losses are excluded subject to applicable statutory rights, which the policy expressly preserves. Unauthorised repairs, incompatible third-party components, transport damage, exceeded temperatures and specified extraordinary events are among its exclusions.
• The warranty instrument and its public catalogue resolver were reviewed on 6 October 2026. The R2-family governing-terms source gate is closed; exact individual eligibility and any additional local-distributor promise remain conditional. Technical datasheet, certification, market availability and cycle-test evidence were not refreshed, and R3/R5/I3 specifications are not transferred. The page remains evidence rather than a score.

• BIWATT Battery R2 (PNR-4.5-02) datasheethttps://www.biwattpower.com/static/policy/Datasheet-BIWATT-PowerNest-sodium-ion-battery-R2-EN.pdf

  BIWATT's own datasheet prints the identity Battery R2 (PNR-4.5-02) and lists a sodium-ion 4.5 kWh stacked module with its cycle life test conditions and a CE certification line.

• BIWATT press release, 24 June 2026 (PR Newswire Asia, source: BIWATT)https://en.prnasia.com/releases/apac/biwatt-expands-sodium-ion-energy-storage-portfolio-with-ul-certified-nfpp-based-r5-and-i3-batteries-538379.shtml

  BIWATT's official release calls the product PowerNest R2 and says it has entered commercial delivery across international markets.

• BIWATT public document catalogue: current product warrantyhttps://www.biwattpower.com/document

  The public catalogue entry BIWATT Product Warranty was created 2 August 2025; its currently served four-page policy carries footer date 10 August 2026. Catalogue creation is not warranty effective date.

• BIWATT current product warranty public download resolver, document 31https://www.biwattpower.com/gateway/front/website/document/31?lang=en

  All four pages read. Table 1 names the R2 family with five-year hardware coverage; full PNR-4.5-02 suffix is not printed. Operating, site, maintenance, claim, remedy, cost and transfer conditions retained. No private warranty/serial endpoint used or temporary download query retained.