Qcells Q.SAVE (Q.HOME CORE)
Qcells states 9 kWh (Q.SAVE 10 kWh, United States) to 18 kWh (Q.SAVE 20 kWh, United States) usable energy and 10 kWh (Q.SAVE 10 kWh, United States) to 20 kWh (Q.SAVE 20 kWh, United States) nominal energy.
Qcells states 5.5 kW (Q.SAVE 10 kWh, United States, DC) to 11.1 kW (Q.SAVE 20 kWh, United States, DC) continuous power.
Warranty terms: 10 years (Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050), United States); 12 years (Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100), United States); 12 years (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes, United States); warranted throughput: 13.13 MWh (Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100), United States); warranted throughput: 15 MWh (Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050), United States); capacity at warranty end: 60% (Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050), United States); capacity at warranty end: 70% (Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100), United States).
Named configurations include Q.SAVE 10 kWh, Q.SAVE 15 kWh and Q.SAVE 20 kWh.
Brand: Qcells
Published figures
No figures have been collected for motor-start current.
| Figure | Value | Publisher | Source |
|---|---|---|---|
| Usable energy, Qcells Q.SAVE D10.0SX (Q.HOME CORE), Qcells Q.SAVE 10 kWh | 9 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Usable energy, retrieved Sep 25, 2026 |
| Usable energy, Qcells Q.SAVE D15.0SX (Q.HOME CORE), Qcells Q.SAVE 15 kWh | 13.5 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Usable energy, retrieved Sep 25, 2026 |
| Usable energy, Qcells Q.SAVE D20.0SX (Q.HOME CORE), Qcells Q.SAVE 20 kWh | 18 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Usable energy, retrieved Sep 25, 2026 |
| Nominal energy, Qcells Q.SAVE D10.0SX (Q.HOME CORE), Qcells Q.SAVE 10 kWh | 10 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Total energy, retrieved Sep 25, 2026 |
| Nominal energy, Qcells Q.SAVE D15.0SX (Q.HOME CORE), Qcells Q.SAVE 15 kWh | 15 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Total energy, retrieved Sep 25, 2026 |
| Nominal energy, Qcells Q.SAVE D20.0SX (Q.HOME CORE), Qcells Q.SAVE 20 kWh | 20 kWh | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Total energy, retrieved Sep 25, 2026 |
| Continuous power, Qcells Q.SAVE D10.0SX (Q.HOME CORE), Qcells Q.SAVE 10 kWh (DC) | 5.5 kW | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Maximum power, retrieved Sep 25, 2026 |
| Continuous power, Qcells Q.SAVE D15.0SX (Q.HOME CORE), Qcells Q.SAVE 15 kWh (DC) | 8.3 kW | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Maximum power, retrieved Sep 25, 2026 |
| Continuous power, Qcells Q.SAVE D20.0SX (Q.HOME CORE), Qcells Q.SAVE 20 kWh (DC) | 11.1 kW | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Maximum power, retrieved Sep 25, 2026 |
| Round-trip efficiency, United States, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes | 95% | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Battery roundtrip efficiency, retrieved Sep 25, 2026 |
| Units per system, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes | 4 battery modules | Manufacturer Not yet checked | Spec sheet, at p.2 Q.SAVE bullets, retrieved Sep 25, 2026 |
| Largest stack, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes | 20 kWh | Manufacturer Not yet checked | Spec sheet, at p.2 Q.SAVE bullets, retrieved Sep 25, 2026 |
| Lowest operating temperature, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes (discharging) | −10°C | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Installation Specifications, retrieved Sep 25, 2026 |
| Lowest operating temperature, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes (charging) | 0°C | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Installation Specifications, retrieved Sep 25, 2026 |
| Highest operating temperature, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes (charging) | 53°C | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Installation Specifications, retrieved Sep 25, 2026 |
| Highest operating temperature, Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes (discharging) | 53°C | Manufacturer Not yet checked | Spec sheet, at p.3 Q.SAVE / Installation Specifications, retrieved Sep 25, 2026 |
See it on the home battery chart
Stated stack range
Largest stated stack: 20 kWh (energy basis not stated) (4 battery modules).
Usable and nominal energy
Nominal energy is the stated total stored energy. Usable energy is the stated amount available to draw.
Qcells Q.SAVE 10 kWh: Qcells Q.SAVE (Q.HOME CORE) states 9 kWh usable and 10 kWh nominal energy (90% usable).
Qcells Q.SAVE 15 kWh: Qcells Q.SAVE (Q.HOME CORE) states 13.5 kWh usable and 15 kWh nominal energy (90% usable).
Qcells Q.SAVE 20 kWh: Qcells Q.SAVE (Q.HOME CORE) states 18 kWh usable and 20 kWh nominal energy (90% usable).
Stated temperature limits
Stated charging range: 32°F (0°C) to 127.4°F (53°C), Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes.
Stated discharging range: 14°F (−10°C) to 127.4°F (53°C), Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes.
Warranty terms
| Term | Figure | Document |
|---|---|---|
| Warranty, United States | Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050): 10 years | Warranty, at §2.a Product Warranty, retrieved Sep 25, 2026, dated Feb 14, 2023 |
| Warranty, United States | Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100): 12 years | Warranty, at §2.a Product Warranty, retrieved Sep 25, 2026, dated Oct 23, 2023 |
| Warranty, United States | Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes: 12 years | Spec sheet, at p.3 Q.SAVE / Warranty, retrieved Sep 25, 2026 |
| Warranted throughput, United States | Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100): 13.13 MWh | Warranty, at §2.b Energy Throughput table, retrieved Sep 25, 2026, dated Oct 23, 2023 |
| Warranted throughput, United States | Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050): 15 MWh | Warranty, at §2.b Energy Throughput table, retrieved Sep 25, 2026, dated Feb 14, 2023 |
| Capacity at warranty end, United States | Qcells Q.HOME CORE, warranty valid from Feb 14, 2023, battery BAT50 (HV10050): 60% | Warranty, at §2.b Performance Warranty, retrieved Sep 25, 2026, dated Feb 14, 2023 |
| Capacity at warranty end, United States | Qcells Q.HOME CORE, warranty valid from Oct 23, 2023, battery T50 (HV51100): 70% | Warranty, at §2.b Performance Warranty, retrieved Sep 25, 2026, dated Oct 23, 2023 |
Features the manufacturer states
| Feature | Stated | Source |
|---|---|---|
| Chemistry (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | LFP Not yet checked | Spec sheet, at p.3 Q.SAVE / Battery type, retrieved Sep 25, 2026 |
| Coupling (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | AC or DC Not yet checked | Spec sheet, at p.1, retrieved Sep 25, 2026 |
| Backup (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | Flexible (partial/whole) home backup via Q.HOME HUB 200SX / 200SX PRO, switchover ~200 ms (single) / ~600 ms (parallel/AC-coupled), generator integration Not yet checked | Spec sheet, at p.2 Q.HOME HUB bullets, retrieved Sep 25, 2026 |
| Compatible inverters (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | Qcells Q.VOLT H3.8SX / H7.6SX Not yet checked | Spec sheet, at p.1 header, retrieved Sep 25, 2026 |
| Enclosure rating (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | NEMA 4X Not yet checked | Spec sheet, at p.3 Q.SAVE / Protection class, retrieved Sep 25, 2026 |
| Nominal battery voltage (Qcells Q.SAVE D10.0SX (Q.HOME CORE)) | 102.4 V Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Voltage, retrieved Sep 25, 2026 |
| Nominal battery voltage (Qcells Q.SAVE D15.0SX (Q.HOME CORE)) | 153.6 V Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Voltage, retrieved Sep 25, 2026 |
| Nominal battery voltage (Qcells Q.SAVE D20.0SX (Q.HOME CORE)) | 204.8 V Not yet checked | Spec sheet, at p.3 Q.SAVE / Nominal Character / Voltage, retrieved Sep 25, 2026 |
| Grid voltage (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | 240 (inverter), 120/240 split phase via HUB V AC Not yet checked | Spec sheet, at p.2 Q.VOLT / Input/Output AC, retrieved Sep 25, 2026 |
| Dimensions (Qcells Q.SAVE D20.0SX (Q.HOME CORE)) | 850 x 1200 x 148 (W x H x D, battery stack) mm Not yet checked | Spec sheet, at p.3 Q.SAVE / General / Dimensions - BAT50-G2, retrieved Sep 25, 2026 |
| Dimensions (Qcells Q.SAVE D10.0SX (Q.HOME CORE)) | 850 x 600 x 148 (W x H x D, battery stack) mm Not yet checked | Spec sheet, at p.3 Q.SAVE / General / Dimensions - BAT50-G2, retrieved Sep 25, 2026 |
| Dimensions (Qcells Q.SAVE D15.0SX (Q.HOME CORE)) | 850 x 900 x 148 (W x H x D, battery stack) mm Not yet checked | Spec sheet, at p.3 Q.SAVE / General / Dimensions - BAT50-G2, retrieved Sep 25, 2026 |
| Product status (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes) | current Checked against the document | Web page, at Home Energy Storage product list, retrieved Sep 25, 2026, dated Sep 25, 2026Q.HOME CORE DC or AC-coupled Up to 20kWh 12 years warranty |
Configurations
Configurations named by the figures
- Q.SAVE 10 kWh
- Q.SAVE 15 kWh
- Q.SAVE 20 kWh
Government and program lists
This product is on none of the lists this site reads.
Installs
No install count this site publishes covers this product.
Recalls and safety notices
No notice in the recall sources this site reads is matched to this product. That is not a safety finding. See every recall notice.
- UL 9540 listed: Yes (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes)
- UL 9540A tested: Yes (Qcells Q.SAVE D10.0/15.0/20.0SX (Q.HOME CORE), all sizes)
The maker states the listing or test. The listing body's records have not been checked.
Backup hours from your load
The stated usable energy divided by your load gives hours, starting with a full battery.
The spec sheet states its usable energy at 25°C.
Continuous power: 5.5 kW (DC)
Continuous power: 8.3 kW (DC)
Continuous power: 11.1 kW (DC)
Backup hours follow the California Air Resources Board’s Zero Emissions Residential Backup Power Tool. Appliance figures come from the US Department of Energy’s Estimating Appliance and Home Electronic Energy Use (2012).
- The appliance figures are nameplate maximums. Average demand changes as appliances cycle and their settings change.
- A load above the stated continuous power gets no figure.
- Motor starts use three times the largest selected motor’s watts, plus the other loads. This estimate is checked against stated peak power when available. Other loads are counted at their running watts.
- Its 5.5 or 8.3 or 11.1 kW is stated on the DC side. The paired inverter’s AC rating can be lower and is not in this calculation.
- Inverter and battery losses are not counted. A field study of household backup power explains the gap.
- Solar recharge, reserves, and temperature changes are outside the calculation.