920W Solar + 1.92 kWh Storage
Combine two high-efficiency 460W N-type TOPCon solar panels with 1.92 kWh of smart LiFePO4 battery storage. Generate more of your own electricity during the day and store energy for use later.

ENA-Listed Solar Platform
The solar generation side is based on Thunder's ENA-listed Bolt 920W configuration under reference THUNE/21204/V1, providing a compliant UK-ready foundation for the solar side of the system.

Two Panels. More Solar Generation.
Two 460W solar panels provide a combined 920Wp of solar capacity, helping generate more electricity across the day than the single-panel Bolt Plus 460W system.

Independent Panel Optimisation
Each solar panel connects to its own independent input and MPPT, allowing both panels to operate individually and efficiently even when sunlight conditions differ between them.

Store Energy for Later
Store available energy for use when solar generation is lower or electricity prices are higher. Time-of-use settings can also help you make better use of lower-cost tariff periods where available.

Smart Energy Management
Built-in Wi-Fi and Bluetooth give you access to solar generation, battery status and system settings from your phone through the monitoring platform.

Built for Everyday Energy Storage
The 1.92 kWh battery uses LiFePO4 cells rated for more than 6,000 cycles, with intelligent self-heating, fanless natural cooling and a 10-year warranty.

Made for Gardens & Flat Spaces
Position the solar panels in a sunny garden, on a suitable flat roof, shed, outbuilding or rear extension roof. A flat roof mounting upgrade is available where required. The compact battery can be positioned separately in a suitable protected location closer to your home electrical connection.

Professional Final AC Connection
The solar, microinverter and battery components are designed to work together as a compact home energy system. The battery arrangement uses a protected AC connection, with the final electrical connection completed by a suitably qualified professional.

Everything You Need in One System
Bolt Plus combines high-output solar generation, smart battery storage, microinverter and connection components into one complete Thunder home energy system.

Solar Panel
 

Rated Power: 2 × 460 Wp (920 Wp total)
Cell Technology: N-type i-TOPCon Monocrystalline
Module Efficiency: 23.0%
Maximum Power Voltage (Vmp): 45.4 V per panel
Open Circuit Voltage (Voc): 53.8 V per panel
Maximum Power Current (Imp): 10.14 A per panel
Short Circuit Current (Isc): 10.81 A per panel
Dimensions: 1762 × 1134 × 30 mm per panel
Weight: 21 kg per panel
Junction Box: IP68
Operating Temperature: -40°C to +85°C
Maximum System Voltage: 1500 V DC
Product Warranty: 25 years
Performance Warranty: 30 years

Microinverter

Rated AC Output: 800 VA
MPPTs: 2 independent MPPTs
Inputs: 1 per MPPT
MPPT Range: 16-60 V
Maximum Input Voltage: 65 V
Peak Efficiency: 96.7%
Connectivity: 2.4 GHz Wi-Fi + Bluetooth
Monitoring: S-Miles Home
Protection Rating: IP67
Cooling: Natural convection, fanless
Dimensions: 261 × 180 × 35.1 mm
Weight: 3.2 kg

Battery

Battery Capacity: 1.92 kWh
Cell Type: LiFePO4
Cycle Life: ≥6,000 cycles
Charge / Discharge Power: Up to 1,000 VA
On-Grid Output: 800 VA nominal
Bidirectional Efficiency: Up to 96.5%
Round-Trip Efficiency: Up to 87%
Charge / Discharge Temperature: -20°C to +55°C
Dimensions: 460 × 240 × 203 mm
Weight: 24 kg
Protection Rating: IP66
Cooling: Natural convection, fanless
Noise Level: <17 dB(A)
Connectivity: Bluetooth + 2.4 GHz Wi-Fi
Monitoring: S-Miles Home
Mounting: Floor or wall mounting
Warranty: 10 years

System & Connection

Solar Capacity: 920 Wp
Maximum Solar AC Output: 800 VA
Solar ENA Reference: THUNE/21204/V1
Battery Storage: 1.92 kWh
Battery AC Output: 800 VA nominal
Solar Inputs: 2 independent MPPT inputs
Final AC Connection: Protected professional connection
Monitoring: S-Miles Home

2× 460W rigid solar panels
1× 1.92 kWh LiFePO4 battery
1× 800VA dual-input smart microinverter
2× AC connection cables
2× Thunder Bolt mounting bracket sets
4× DC extension cables
1× Double pole isolator
2× Disconnect tools
1× Set of solar warning labels
1× Installation guide

The solar panels are delivered by pallet. Battery and kit accessories may arrive separately.

What is the difference between Bolt Plus 460W and Bolt Plus 920W?
Both systems include the same 1.92 kWh battery storage. Bolt Plus 460W uses one 460W solar panel, while Bolt Plus 920W uses two 460W panels for a combined 920Wp of solar capacity and greater generation potential.

What is the difference between Bolt 920W and Bolt Plus 920W?
Bolt 920W is our solar-only ENA-compliant plug-in solar system. Bolt Plus 920W combines the same 920Wp solar generation platform with 1.92 kWh of smart battery storage, allowing energy to be stored and used later.

Is Bolt Plus 920W an ENA-compliant plug-in solar system?
The solar generation side is based on the ENA-listed Bolt 920W configuration under reference THUNE/21204/V1. The current UK plug-in solar framework applies to solar-only plug-in devices and does not extend to plug-in battery systems, so the Bolt Plus battery connection is treated separately and uses a professional protected AC connection.

How much solar power does Bolt Plus 920W provide?
Bolt Plus 920W uses two 460W solar panels, providing a combined peak solar capacity of 920Wp. The solar microinverter has a maximum AC output of 800VA.

Why does Bolt Plus 920W use an 800VA microinverter?
The 920W figure is the combined peak DC rating of the two solar panels, while maximum solar AC output is limited to 800VA. The additional panel capacity helps the system achieve stronger output across more of the day, particularly when conditions are below the panels' rated test conditions.

Do the two solar panels work independently?
Yes. Each 460W panel connects to its own independent input and MPPT, allowing each panel to be individually optimised when sunlight, orientation or shading conditions differ.

How much energy can the battery store?
The battery provides 1.92 kWh of LiFePO4 storage capacity, giving you a useful energy reserve for periods when solar generation is lower or grid electricity is more expensive.

What happens to energy I don't use immediately?
The battery provides storage that can be used later, helping you manage when energy is consumed and reduce reliance on higher-cost grid electricity when configured appropriately.

Can the battery charge from the grid as well as solar?
Yes. The battery supports time-of-use charging, allowing it to charge during lower-cost tariff periods and discharge when electricity is more expensive. Actual savings depend on your tariff, system settings and household energy use.

Can I monitor the solar system and battery from my phone?
Yes. Built-in Wi-Fi and Bluetooth allow you to monitor solar generation, battery status and system performance from your phone through the monitoring platform.

Where can I install the Bolt Plus 920W?
The solar panels are particularly suited to gardens, suitable flat roofs, sheds, outbuildings and rear extension roofs. The battery should be installed on a stable surface or suitable wall mount in accordance with the installation guidance and positioned appropriately for its operating environment.

Does the Bolt Plus 920W require an electrician?
Yes. Unlike the solar-only Bolt plug-in system, the Bolt Plus battery arrangement requires a professional final AC connection. You can arrange your own suitably qualified electrician or select Thunder's installation option when ordering.

Can I add more battery storage later?
Yes. The battery platform supports expansion, with two compatible 1.92 kWh units providing up to 3.84 kWh of combined storage when configured appropriately.

How long is the battery designed to last?
The LiFePO4 cells are rated for at least 6,000 cycles, and the battery is supplied with a 10-year warranty.

• Kit Installation Manual
• Battery Datasheet
• Battery User Manual
• Microinverter Datasheet
• G98 Post-Installation Form
• Find Your DNO