GrowattARK 20.4L
The Growatt ARK 20.4L is a home battery with usable capacity 18.43 kWh, charge power (continuous) 5 kW and cell chemistry LFP.1
Key figures
IE
Rules in Ireland
SEAI home battery grant
UnknownA €600 grant for home battery storage systems was announced on 29 September 2026 and opens from 6 October 2026, subject to final implementation arrangements. Check SEAI for the detailed conditions before applying.
Technical specifications
| General | |
|---|---|
| Cell chemistry | LFP1 |
| Performance | |
| Usable capacity | 18.43 kWh1 |
| Nominal capacity | 20.48 kWh1 |
| Charge power (continuous) | 5 kW1 |
| Discharge power (continuous) | 5 kW1 |
| Dimensions & weight | |
| IP rating | IP651 |
| Min. operating temperature | -10 °C1 |
| Width | 650 mm1 |
| Height | 1,445 mm1 |
| Depth | 260 mm1 |
| Weight | 224 kg1 |
| Warranty & lifespan | |
| Warranty | 10 years1 |
Manufacturer documentation
- Datasheet / specifications — ARK LV Battery System – zonder versienummer
External links to Growatt's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.
Compare with
Frequently asked questions
What is the usable capacity of the Growatt ARK 20.4L?
The usable capacity of the Growatt ARK 20.4L is 18.43 kWh.1
What is the charge power (continuous) of the Growatt ARK 20.4L?
The charge power (continuous) of the Growatt ARK 20.4L is 5 kW.1
Which cell chemistry does the Growatt ARK 20.4L use?
The cell chemistry of the Growatt ARK 20.4L is LFP.1
What is the warranty of the Growatt ARK 20.4L?
The warranty of the Growatt ARK 20.4L is 10 years.1
Sources
- ARK LV Battery System, zonder versienummer — SHENZHEN GROWATT NEW ENERGY CO.,LTD. · accessed 1 Oct 2026
- SEAI home battery grant — Sustainable Energy Authority of Ireland (SEAI)