Pre-launch · South Africa

Home energy storage, 135 mm deep.

The Granville GV-ESS-12K-BLADE pairs a passively cooled hybrid inverter with stackable LFP battery modules in one slim, 620 mm wide tower.

Depth: 135 mm
Inverter: approx. 12 kW
Storage per tower: up to ≈ 20.48 kWh
Enclosure: IP54*

Made for South Africa

Built for load-shedding resilience and scheduled heavy loads.

Designed to manage seamless home backup alongside scheduled borehole pump and solar geyser circuits across South African single-phase 230 V or three-phase 400 V supplies.

Load-shedding backup architecture with modular storage scaling
Dedicated scheduling capability for borehole pumps and electric geysers
300 mm tower-to-tower spacing for compact garage or sheltered exterior walls

Design

Engineered quietly. Finished in high-gloss space grey.

Passive cooling

Passively cooled design; 59 rear fins, no fan as the primary heat path.

5″ smoked-glass display

Set into the face of the inverter head.

The solar-amber light line

Single vertical solar-amber light line, showing the system state at a glance (states indicative).

Lockable service bay

Lower recessed hinged LOTO access door with rotary PV DC isolator, DIN-rail AC/DC circuit breakers, and CAN-FD / RS485 / telemetry interfaces.

Modular LFP storage

2 to 4 GV-Blade-5000 modules per tower, separated by a precise 3 mm shadow gap.

Configure your tower

Stack the storage you need.

Each GV-Blade-5000 module slots beneath the inverter head. Choose the stack that suits your home — your installer confirms the final design on site.

Nominal storage: ≈ 15.36kWh
Stack height: 1,602 mm
Footprint: 620 × 135 mm
Tower mass: approx. 159 kg

Specifications

Every figure, honestly labelled.

This product is still in development. Verified figures are fixed; Design target figures may change before launch.

Dimensions

Width: 620 mmVerified
Depth (product only): 135 mmVerified
Inverter head height: 450 mmVerified
Battery module height: 350 mmVerified
Plinth height: 90 mmVerified
Shadow gap: 3 mmVerified

Inverter

Output: Approx. 12 kW, 1-phase 230 V or 3-phase 400 V, 50 HzDesign target
Topology: Hybrid, silicon-carbide switchingDesign target
Cooling: Passive · 59 rear finsGeometry verified
Mass: approx. 32 kgDesign target
Enclosure: Designed to meet IP54*Design target

Battery module · GV-Blade-5000

Energy: approx. 5.12 kWhDesign target
Nominal voltage: 51.2 VDesign target
Chemistry: LFP · 16 cellsDesign target
Mass: approx. 41 kgDesign target
Modules per tower: 2, 3, 4Verified

Interface & finish

Display: 5" smoked glassVerified
Status light: Single vertical solar-amber light lineVerified
Finish: High-gloss Space GreyDecided

Confirmed closer to launch

We only publish these once testing and certification are complete:

Certification results
Fire-safety system details
Maximum parallel towers
Wall stand-off distance
Round-trip efficiency
Cycle life
Warranty terms
Acoustic noise level
Operating temperature range
Backup switchover time
App features
Pricing

Installation

Installed by certified professionals.

The Granville GV-ESS-12K-BLADE is sold through installers. You register interest; Granville matches you with a certified installer in your area when the product launches in South Africa.

01
Register interest
Tell us about your property and preferred tower size.
02
Get development updates
Engineering milestones and certification progress for your region.
03
Meet your installer
A certified local installer designs and installs your system.

Permitted locations

Garage
Utility room
Sheltered exterior wall

Tower-to-tower spacing

300 mm

Grid connection

Approx. 12 kW, 1-phase 230 V or 3-phase 400 V, 50 Hz

Better together

Complete the system.

Solar PV Input Architecture

Direct DC array integration through the rotary PV DC isolator.

Battery-Only Tower Top Cap

Weather-sealed Space Grey cap for parallel GV-Blade-5000 expansion towers.

Be first in line in South Africa.

No pricing or delivery dates yet. Register to get development updates and to be matched with a certified installer at launch.