Compare like with like. Aligned scores, specifications and local evidence within one scoring class or tier.
Market context
United States purchasing view
Briggs & Stratton | SPHI-19.8-L0 three-module stack; the warranty and manual write it SPHI-B-19.8-L0; module SPHI-B-6.6
72/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-07
Available in United States · checked 2026-08-07
Buyer evidence: Ready (100% direct coverage).
BYD | Battery-Box Premium HVL 12.0 (US)
60/ 100
Strong evidence coverage · 100%
Evidence checked 2026-08-07
Available in United States · checked 2026-08-07
Buyer evidence: Ready (100% direct coverage).
| Measure | SimpliPHI 6.6 | Battery-Box Premium HVL |
|---|---|---|
| Capacity & Usability | ||
| Power & Efficiency | ||
| Longevity (verified) | ||
| Safety & Chemistry | ||
| Guarantee & Backbone | ||
| Energy Ecosystem |
| Measure | SimpliPHI 6.6 | Battery-Box Premium HVL |
|---|---|---|
| Architecture | DC-coupled battery | DC-coupled battery |
| Published usable capacity range | 19.95 kWh | 12 kWh |
| Chemistry | LFP | LFP |
| Power | 13.98 kW | Not recorded |
| Round-trip | 96 % | 96 % |
| Cycle life | Not recorded | Not recorded |
| Evidence | SimpliPHI 6.6 | Battery-Box Premium HVL |
|---|---|---|
| Outcome | Available in United States | Available in United States |
| Checked | 2026-08-07 | 2026-08-07 |
| Certifications | Exact specification: UL 9540 Edition 3, UL 9540A, UL 1973, UL 1998 with UL 991, IEC 62619, UN 38.3 and UN 3480; SPHI-6.6-L0, SPHI-13.2-L0 and SPHI-19.8-L0 also appear in the California battery list | Exact HVL V1.9 datasheet: UL 9540A, UL 1973, IEC 60730, FCC and UN 38.3; UL 9540 applies only to exact certified system combinations |
| Warranty scope | United States and named territories under the directly retrievable manufacturer warranty; ten years, 37.6 MWh per module at 100% depth of discharge, and 5.0 kWh retained from each 6.6 kWh module. The advertised 15-year term remains held until a stable governing legal instrument is retrievable. | United States for named HVL products installed on or after 1 November 2024; ten years or 30.30 MWh for HVL 12.0, whichever occurs first, with 70% retained usable energy. |
| Warranty remedy | Briggs & Stratton may repair, replace with new or reconditioned equivalent-value parts, or provide straight-line depreciated cash compensation. | Repair, equivalent new or used replacement, or a formula-based partial refund at BYD's discretion. |
| Labour and reinstallation | Mileage, travel, installation, removal, reinstallation and software-update costs are excluded. Removal and reinstallation costs are excluded. | No site-labour reimbursement entitlement is stated. No removal or reinstallation benefit is stated. |
| Freight | Shipping to the warrantor is excluded. Briggs & Stratton bears shipping of an accepted repaired or replacement product to the original location. | No ordinary freight entitlement is stated; transport damage is excluded. |
| Transfer and registration | Transfers for the remaining original term only while the product remains at the original use location. Registration affects the warranty start date. Firmware must be maintained; after three consecutive months without a deployed update, affected software-defined equipment may reduce to five years. | Original Buyer only; no subsequent-owner transfer right is stated. No pre-registration is stated, but invoice, configuration, serial numbers, firmware and inverter details are mandatory for a claim. |
| Grid compatibility | 48 V DC battery. The exact controller publishes CAN/RS485 inverter communication; AC transfer, grid forming and outage PV behavior remain inverter- and design-dependent. | 120-173 V DC operating range for HVL 12.0. AC transfer, grid forming and outage PV behavior depend on an exact certified inverter and system design. |
| Local product pathway | No separate local pathway recorded | No separate local pathway recorded |
| Buyer evidence | Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed. | Ready (100% direct coverage): Local availability, buyer evidence, and the publication threshold are confirmed. |
| Safety notice | No model-specific notice recorded | No model-specific notice recorded |
| Review note | The exact three-module stack publishes 19.95 kWh nominal, 13.98 kW continuous and 17.5 kW for ten seconds. Usable energy is not separately published. The battery remains current in the United States catalogue. | BYD America LLC is the warrantor and publishes a US service route. The warranty is Original Buyer only and does not promise labour, freight, removal or reinstallation. |
| Sources | Source 1Source 2Source 3Source 4Source 5Source 6 | Source 1Source 2Source 3Source 4Source 5 |
A score lead is only meaningful inside this shared class or tier. Weigh it against the specification and evidence rows above before deciding.
Both products are scored in the Performance & Value class, on the same rubric weighting. Scores are not comparable across classes or tiers. Full methodology.