| Published capacity range | 18 kWh |
| Scored configuration | 18 kWh |
| Cell chemistry | NMC |
| Usable capacity | 18 kWh |
| Continuous power output | 10.5 kW |
| Warranty period | 10 yr |
| Safety certification | UL9540 / IEC62619 |
| Reliability testing | Not independently tested |
| Manufacturing track record | 15+ years, field-proven |
Some values are estimated where independent verification was not available: see the full scorecard and review.solar/terms.
PWRcell 2 18 · every criterion scored by the live rubric (Solar Analytica battery rubric v2.12.0), with its recorded value, evidence status, and any linked source. Page 1 carries the buying-decision summary; this page is the full record for verification and right of reply.
| Capacity & Usability | |||
| Modularity & scalability | Fully modular, ≤5 kWh increments, expandable in field | datasheet | Source |
| Power & Efficiency | |||
| Continuous power output (kW) | 10.5 | datasheet | Source |
| Backup switching speed | <100ms fast relay (essential loads maintained; some sensitive equipment may re | datasheet | Source |
| Operating temperature range | Standard | datasheet | Source |
| Longevity (verified) | |||
| Warranty throughput | 2.5-5 MWh warranted per kWh usable | datasheet | Source |
| Warranty period (yrs) | 10 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | datasheet | Source |
| Verified reliability | Not independently tested | reviewed absence | Source +1 |
| Warranty degradation guarantee | End-point only: minimum capacity at end of warranty term | datasheet | Source |
| Safety & Chemistry | |||
| Cell chemistry | NMC | datasheet | Source |
| Safety certification | UL9540 / IEC62619 | datasheet | Source +1 |
| Thermal & fire mitigation | Basic | datasheet | Source |
| Cell provenance & traceability | Undisclosed | reviewed absence | Source |
| Guarantee & Backbone | |||
| Warranty assurance | Parts, labour & transferable | datasheet | Source |
| Financial strength & warranty backing | Stable / listed | datasheet | Source +3 |
| Manufacturing track record | 15+ years, field-proven | datasheet | Source |
| Energy Ecosystem | |||
| Grid-forming & backup tier | Whole-home backup via paired hybrid inverter (capability is inverter-dependent | datasheet | Source |
| Open protocol & API maturity | Cloud API only | datasheet | Source +2 |
| VPP & grid services readiness | VPP-capable + live VPP program (named market) | datasheet | Source +2 |
| Smart home & IoT depth | No local smart home integration | datasheet | Source +1 |
| Firmware & security disclosure | Firmware updates referenced; no security documentation | datasheet | Source |
review.solar · audit sheet · Solar Analytica battery rubric v2.12.0 · https://review.solar/cards/generac-pwrcell-2-18-us