Device Comparison
BYD Battery-Box Premium HVS/HVM vs GoodWe Lynx D G2 vs SMA Home Storage vs SAJ B2 HV
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Battery Storage
GoodWe Lynx D G2 Series
GoodWe GW5.1-BAT-D-G20 / GW6.0-BAT-D-G20 / GW8.3-BAT-D-G21 / GW9.0-BAT-D-G20
Use this comparison when the battery decision is tied closely to the inverter brand and installer ecosystem, not just standalone storage specs.
| Install fit | ||||
|---|---|---|---|---|
| Phase support | Depends on paired inverter; common with 1-phase and 3-phase hybrid systems | Single-phase and three-phase compatible GoodWe storage systems | Compatible with single-phase and three-phase SMA hybrid storage systems depending on inverter model | Depends on paired SAJ hybrid inverter; commonly used in residential single-phase systems |
| Installation | Floor-standing modular high-voltage battery tower | Floor-stacked, wall-mounted, or grounded modular high-voltage residential battery | Stackable wall-mounted, floor-mounted, or back-to-back modular battery system for residential indoor or outdoor installation | Wall-mounted or ground-mounted modular high-voltage residential battery |
| Measurement | Battery storage telemetry through compatible inverter/BMS, not an inline energy meter | High-voltage LFP battery storage system with BMU-managed DC energy storage | Modular LiFePO4 battery storage system for DC-coupled solar self-consumption and backup-ready SMA hybrid setups | High-voltage residential battery storage family for solar self-consumption and compatible backup-ready hybrid systems |
| Max current | 50 A | Unknown | 36 A | 50 A |
| Inverter fit | ||||
| Backup support | Backup and off-grid capable with compatible inverter | Unknown | Unknown | Unknown |
| Battery fit | ||||
| Chemistry | LFP | Lithium iron phosphate (LiFePO4) | Lithium iron phosphate (LiFePO4) | LFP (LiFePO4) |
| Warranty | 10 years | 10 years | 10 years | 10 years |
| Expansion | HVS 5.1-38.4 kWh usable; HVM 8.3-65.0 kWh usable | 5-9 kWh per unit; up to 12 units in parallel | 3.28-16.40 kWh usable capacity across 1x-5x module configurations; expansion possible within 2 years | Modular one-stack family from 5.0 kWh to 25.0 kWh, depending on the number of battery modules |
| Monitoring | ||||
| Protocol | Unknown | CAN / RS485 | SMA battery interface / RJ45 | Unknown |
| Local API | No | No | No | No |
| Cloud dependency | Depends on paired inverter monitoring platform; battery itself is not a homeowner local-API device. | GoodWe SEMS app and inverter ecosystem are typically used for normal remote monitoring and management. | SMA app and portal are typically used for normal monitoring. | Usually monitored through the paired SAJ inverter and eSolarCloud ecosystem. |
| Home Assistant | No | No | No | No |
| Solar fit | ||||
| Solar import/export | Yes | Yes | Yes | Yes |
| Buying context | ||||
| Price range | Installer supplied; typically quoted as part of a battery system | Installer-quoted | Installer-quoted | Installer supplied; varies by battery stack size and region |
| Availability | EU, UK, AU, Global | Global / region-dependent GoodWe availability | Europe / country-dependent SMA availability | Global / region-specific SAJ residential battery availability varies |
| Source check | ||||
| Last verified | May 19, 2026 | May 22, 2026 | May 19, 2026 | May 22, 2026 |
| Product page | Official page | Official page | Official page | Official page |
| Documentation | Official docs | Official docs | Official docs | Official docs |
Verdict
Choose the storage platform that best matches the inverter family and support channel you expect to use, because brand compatibility matters more here than isolated spec-sheet differences.