Galvani

Last verified 2026-10-06.

• Eleven Energy describes Galvani as a stackable home battery built on sodium-ion chemistry, with each module based on a 4.5 kWh sodium pack.
• The maker says it supplies systems in the UK through its distributor, Midsummer Energy, and through trained installers; no price is shown on the product page.
• The page remains unscored: round-trip efficiency is not established and continuous power in kW remains unresolved. An exact-model maker-hosted EMC conformity document is now readable, but no exact safety certification listing was independently recovered; EMC and battery safety scopes are kept separate.
• The previously missing governing warranty document is now readable. Its battery coverage is ten years from commissioning or 8 MWh lifetime throughput per 1 kWh battery capacity, whichever comes first, with at least 75% retention and UK installation/app/internet conditions. The marketing 8,000-cycle headline is not substituted for those terms.
• The 66.24 kWh figure is the usable capacity of a full 16 module stack, not the rating of one module, and this record is not joined to any scored or evidence record.
• Legal manufacturer as printed: Eleven Energy Ltd.
• The product page now links the complete Eleven Energy Product Warranty. It covers Eleven Energy battery products but does not print individual model codes or an effective sales cohort; applicability to Galvani is supported by that exact maker product-page link and remains subject to UK commissioning conditions. The instrument has no printed revision date; its March 2026 upload path is not treated as one.
• The governing battery term runs from commissioning for ten years or until lifetime throughput reaches 8 MWh per 1 kWh of battery capacity, whichever comes first. It guarantees at least 75% capacity retention during that covered period. The brochure headline of 8,000 cycles is not substituted for this throughput condition or an independent cycle-test endpoint.
• Warranty eligibility requires installation and commissioning by a qualified UK-registered electrician, commissioning through the Eleven Energy app, internet connection for monitoring/updates/support, full payment and compliance with manual/app instructions. Smart scheduling and tariff integration need internet; this policy does not establish unconditional offline feature availability or warranty entitlement in another country.
• Transfer is allowed with ownership and purchase evidence while the product stays at its original installation site. Defects must be reported in writing within 30 days. The maker may inspect or require return to an authorised service centre, at its cost if the product is deemed defective; it chooses repair or replacement, with a full refund if replacement is not feasible. Replacements continue the original warranty start date.
• The warranty lists exclusions for normal wear, misuse, negligence, unauthorised repair/modification, specified environmental and utility events, unauthorised third-party components/installation and force majeure. It requires stopping use on discovering a defect. Additional out-of-scope work may be charged; there is no blanket promise of labour, freight, removal or reinstallation reimbursement beyond the conditional service-centre return provision.
• The maker-hosted KSIGN EMC Verification of Conformity explicitly names Galvani Sodium V1, ELB-4.5-02 and Eleven Energy Ltd. Certificate KD2512S6428EC, report KD2512S6428E, issued 31 December 2025, address the listed EN IEC 61000-6 EMC standards under Directive 2014/30/EU. Results are limited to the tested sample. This is EMC evidence, not EN IEC 62619 battery safety certification, a fire test, local grid approval or independent verification of the issuer register.
• That EMC document lists 45 Vdc rated voltage, a 33-59.25 Vdc operating range and 100 Adc maximum continuous charge/discharge current for the tested model. The maker product table instead lists an upper voltage of 59.2 V and gives separate multi-module current limits. These boundaries are retained; neither nominal-voltage multiplication nor an inverter rating is entered as a supported continuous battery-power rating in kW.
• Round-trip efficiency is not established, continuous power in kW remains unresolved and no exact safety certification listing was independently recovered. The newly recovered warranty and EMC documents add depth without promoting the evidence page, changing product identity or transferring BIWATT or adjacent Eleven Energy product ratings.

• Eleven Energy, Galvani sodium battery datasheet, Version 1.0, Dec 2025https://www.elevenenergy.co.uk/wp-content/uploads/2026/05/Galvani-Sodium-Battery-Datasheet-V1.0.pdf

  Prints the product name Galvani and code ELB-4.5-02, sodium-ion battery type, 4.5 kWh capacity, EN IEC 61000-6 and EN IEC 62619 standards, a 10 year product warranty and 66.24 kWh usable capacity for up to 16 modules.

• Eleven Energy, Galvani Stackable Sodium-ion Battery product pagehttps://www.elevenenergy.co.uk/products/galvani-sodium-ion-battery/

  Describes the Galvani stackable sodium-ion battery system, states a 10 year, 8000 cycle product warranty, names Midsummer Energy as UK distributor and prints the legal entity Eleven Energy Ltd, with no price shown.

• Eleven Energy, Frequently Asked Questionshttps://www.elevenenergy.co.uk/frequently-asked-questions/

  States that modules are based on 4.5 kWh sodium packs, that systems are supplied through UK distributor Midsummer Energy and trained installers, and that warranty cover is subject to throughput limits in a separate warranty document.

• Eleven Energy Product Warranty, complete three-page governing policyhttps://www.elevenenergy.co.uk/wp-content/uploads/2026/03/Eleven-Energy-Product-Warranty.pdf

  Linked by exact Galvani page; generic battery table, UK qualified commissioning/app/internet, earliest ten-year/throughput term,75% retention, remedies/costs/transfer. No printed revision or individual SKU table.

• Galvani ELB-4.5-02 KSIGN EMC Verification of Conformityhttps://www.elevenenergy.co.uk/wp-content/uploads/2026/05/Galvani-ELB-4.5-02_CE-EMC.pdf

  Maker-hosted exact-model certificate KD2512S6428EC/report KD2512S6428E,31 December 2025; EMC tested-sample scope only, not battery safety/fire/grid approval.