Power Your Home
Smart home battery. Smart energy app. No installation needed.
The Essential
Provides 2.4kW continuous output to power your household essentials. The JET Cloud app schedules charging during off-peak rates, boosts solar self-consumption by over 40%, and cuts grid dependence by over 60%.
The Powerful
Same simplicity as the Pro — just plug-and-play — but with twice the capacity giving you the peace of mind and stronger resilience for longer outages and bigger loads.
A Solution That Makes Sense
Safety
Semi-solid LiFePO4 chemistry means no thermal runaway. Certified to EN IEC 62619. Safe enough to run indoors
Smart Energy
Auto-schedules charging during off-peak rates. Weather-based pre-charging prevents outages. Charge when energy prices go negative. All managed from the JET Cloud app.
Flexibility
Start with 2.6kWh. Stack up to five more packs any time — no sparkie, no new wiring. They sync automatically
Durability
IP65 rated for indoor and outdoor use. −20°C to 55°C operating range. Rain, cold, or heat — it keeps running
The Clear Winner for UK Homes
GreenArk Pro vs comparable balcony and home battery systems. No installation. No compromise.
| Feature | GreenArk Pro ✓ | Typical Balcony Kit* |
|---|---|---|
| Built-in Inverter Output | 2,400 W | 600–800 W |
| Max Capacity (expandable) | 15.6 kWh / 6 battery packs | 2–4 kWh |
| Battery Technology | Semi-Solid-State LiFePO4 | Standard LiFePO4 |
| Installation | Plug-and-play — no electrician | May require professional install |
| Warranty | 10 years full replacement | 3–5 years |
| Fanless / Silent Operation | Yes — fanless, noise-free | Fan-cooled, audible |
| IP Rating | IP65 — outdoor rated | Varies |
| Smart App Control | Yes — JET Cloud (iOS & Android) | May require third-party |
| Starting Price (incl. VAT) | £999 | £699–£1,000+ |
| Launch Offer | £999 — limited time | Standard pricing |
* Representative of comparable balcony solar + battery storage products on the market. Competitor brands omitted.
GreenArk is built with technical excellence and an extensive 10-year warranty
Customer Satisfaction
If the battery or the inverter runs into any technical issues, our team will work with you to resolve the issue and offer a 10-Year Warranty if needed.
Safety
CE-LVD, CE-EMC, EN IEC 62619. UN38.3 certified. We've completed all safety and certification testing to give you the maximum peace of mind.
Smart Control
JET Cloud puts you in control. Set time-of-use schedules, monitor live energy flows, track your savings, and let AI automatically optimise when to charge and discharge. iOS and Android.
Yes. As of April 15, 2026, UK plug-in solar regulations allow homeowners to install and plug in compliant battery systems without a licensed electrician. GreenArk Pro is fully compliant with this regulation. See official UK government announcement →
UKCA certification is pending and expected by the end of June 2026. We are selling under our existing CE certification in the meantime, which covers safety and EMC compliance. All products will be UKCA-certified before the end of June 2026.
Yes. GreenArk Pro: Each pack is 2.6kWh. Start with one and stack up to five more packs, for a total of 15.6kWh. GreenArk Ultra: Each pack is 5kWh. Start with one and add up to three more packs, for a total of 20kWh. Both models support simple plug-and-play daisy-chaining. Each additional pack costs the same as your first pack. Expansion requires no new installation — just plug the new pack in and it joins the system automatically.
Yes. GreenArk Pro has two MPPT channels with 99.8% efficiency, accepting up to 2,000W of solar input combined. You can charge the battery from solar during the day and use that power in the evening — or set schedules so stored energy is used during peak-rate hours. It also works without solar; plug it into any standard socket to charge from grid electricity.
Zero feed-in means your system does not export surplus power back to the grid. Paired with a Shelly smart meter, this keeps you fully compliant with UK grid connection rules and avoids potential export licence requirements. You keep and use all the power your system generates or stores.
For additional questions, please reach out to support@greenark.co
Trusted by UK Homeowners
"Fully set up and running within 20 minutes. The semi-solid-state battery gives real peace of mind on the balcony — no overheating worries at all."
— Marcus T., Edinburgh
"The 2400W inverter handles everything — kettle, washing machine, all at once. Electricity bill dropped noticeably in the first month."
— Priya R., Bristol
"Renter with no solar option at my flat. Plugged into a standard socket and it's been a game changer. Charges during off-peak, takes over during peak hours."
— Daniel F., Manchester