sonnenCore+ 10 kWh

~$9,500approx. list price

800 WLights, phones, router, a CPAP
2,200 WFridge, freezer and the essentials
4,000 WFurnace blower, sump pump or a window AC
7,500 WWell pump or a small central AC
18,000 WWhole home with central air

4,800 W running, 8,640 W surge — sustains the furnace blower, sump pump or a window AC tier and everything below it.

Best forHomes that want a silent indoor battery on a modest essentials panel, or buyers in sonnen's virtual power plant programs.

A floor-standing cabinet that combines a 4.8 kVA inverter and 10 kWh of LFP in one indoor unit, with a 20 kWh variant (SCORE-P20) and stacking to 60 kWh across three systems. The spec sheet gives a noise emission under 25 dB, so it can sit in a garage or utility room without being heard, which is its best selling point against fan-cooled rivals. Backup power is the soft spot: 4.8 kVA continuous, with a 5-second surge of 8,640 W (36 A at 240 V), so a central air conditioner needs a second cabinet or a load-managed panel. Round-trip efficiency peaks at about 85%, below most rivals. Installers are scarce, and sonnen publishes no price; $9,500 is the sonnenCore's hardware launch price, and installed jobs commonly land between $12,000 and $18,000.

From the spec sheet

Specifications

Battery capacity: 10,000 Wh
Expandable to: 60,000 Wh
Continuous output: 4,800 W
Surge output: 8,640 W
Runtime: Fridge (~150W): ~60 hrs on one 10 kWh unit; essentials (~1kW): about 9 hrs

Type: Home Battery System
Fuel: Battery (LiFePO4)
Noise: 25 dB
Outlets: None — hardwired; AC-coupled with 35 A pass-through for a backup subpanel, 200 A with the AC Connections module
Transfer-switch ready: Yes
Weight: 353 lbs
Warranty: 10-year or 10,000-cycle system warranty
Model: SCORE-P10