• Home
  • Solar Panel 400W
  • Solar Panel 400W
  • Solar Panel 400W - 2
  • Solar Panel 400W - 3
  • Solar Panel 400W - 4
  • Solar Panel 400W - 5
  • Solar Panel 400W - 6
  • Solar Panel 400W - 7
  • Solar Panel 400W - 8
  • Solar Panel 400W - 9
  • Solar Panel 400W - 10
  • Solar Panel 400W - 11
  • Solar Panel 400W - 12
  • Solar Panel 400W - 13
  • Solar Panel 400W
  • Solar Panel 400W - 2
  • Solar Panel 400W - 3
  • Solar Panel 400W - 4
  • Solar Panel 400W - 5
  • Solar Panel 400W - 6
  • Solar Panel 400W - 7
  • Solar Panel 400W - 8
  • Solar Panel 400W - 9
  • Solar Panel 400W - 10
  • Solar Panel 400W - 11
  • Solar Panel 400W - 12
  • Solar Panel 400W - 13

Solar Panel 400W

£199.99
£199.99
Sale Sold out
Tax included. Shipping calculated at checkout.
Description

High-performance solar power in a compact rigid panel.

The Thunder Bolt 400W is a rigid monocrystalline TOPCon solar panel designed for fixed home solar installations where a robust framed panel is the right choice.

Rated at 400Wp, the panel measures just 1555 × 1134 mm and weighs 15 kg, making it well suited to gardens, sheds, outbuildings and suitable flat-roof mounting systems.

Pre-fitted 4 mm² DC leads with MC4 connectors make integration straightforward with compatible microinverters and other solar equipment. The panel is IP67 rated and tested to recognised IEC photovoltaic module safety and performance standards.

This listing is for the solar panel only. If you are looking for a complete system with microinverter, AC connection cable and mounting hardware, explore the Thunder Bolt plug-in solar kits.

Free UK Delivery.

Adjustable Mounting Bracket: None

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Klarna
  • Maestro
  • Mastercard
  • PayPal
  • Shop Pay
  • Union Pay
  • Visa
Solar Panel 400W
Solar Panel 400W
£199.99
£199.99

Frequently asked questions

Solar Panel 400W - 5 Solar Panel 400W - 5

No. This product includes one Bolt 400W DC solar panel only. It does not connect directly to a UK socket. A compatible inverter or microinverter and the appropriate electrical connection equipment are required.

The rigid panel is particularly suited to gardens, sheds, outbuildings, suitable flat roofs and other fixed locations using an appropriate solar mounting system.

No. This listing is for the solar panel only. For a complete system including a microinverter, AC connection cable and mounting hardware, choose one of our Bolt plug-in solar kits.

Yes. The panel is supplied with pre-fitted 800 mm, 4 mm² DC cables with MC4 connectors.

The panel measures 1555 × 1134 × 30 mm and weighs approximately 15 kg.

Yes. The panel has an IP67 rating and an operating temperature range of -40°C to +85°C.

Yes, provided the microinverter is electrically compatible with the panel's voltage and current characteristics. Always check the inverter's permitted DC input specifications before connection.

Potentially, but compatibility depends on the inverter, electrical configuration and existing panels. Do not add panels based on wattage alone. Voltage, current and inverter input limits must also be checked.

What our customers say

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

Good customer care

I bought a rigid pv panel, floor mount and Uk mains cable to micro inverter lead. All were delivered very quickly. Support from Hannah has been a stand-out part of the customer experience: helpful, responsive and no hard sales push.

E.T

Storm Plus 360W Solar Kit with Battery - Excelent Package System

The system is now installed and working well. At this stage it is largely a matter of fine-tuning the battery settings to suit the flat’s actual usage pattern.

D.

Hoymiles microinverter

Ordered a microinverter and delivered 2 days later. Amazing service. Easy to connect and set up after an account was set up for me. Amazing service from Hannah. Would highly recommend.

G.W

Hoymiles micro inverter

Supplied micro inverter. Arrived quickly. I had a few issues connecting it but Thunder were so helpful via WhatsApp - really went the extra mile to make sure I was happy - highly recommended company.

N.I

Got Storm 360W for our balcony and it…

Got Storm 360W for our balcony and it has worked brilliantly for us. Makes lots of sense to have this for us, as I’m WFH and has been a strong boost for energy saving for us.

J.

Amazing Sevice

I have a big, south facing garden but our dormer means that traditional solar panels aren’t cost effective. I came across Thunder who offered an greats alternative… they quickly arranged and installed a 1.07kWp system together all for under £1000! Highly recommend Thunder!

R.B

A young team who helped us

A young team who helped us with the whole process - thanks Matt!

D.N.M

Very happy with our storm kit

We installed Storm 360W on our balcony with some small adjustments and have been very happy with it. Its been fun to see how much we electricity produce everyday!

A.

Innovative and professional startup

I'm so glad to try Storm710W from this company. It significantly reduced my electricity costs, and the company was extremely helpful and professional. They're a successful, innovative startup that takes a very close interest in its customers.

R.Y

How much could you save?

Enter your postcode and pick a kit. We estimate what it would generate at your address and what that is worth on your bill.

Step 1: Enter details

Solar power system

Typically 26p to 32p per kWh

Your estimate appears right here, straight away.

Want to talk through your solar setup with our products team?

Step 2: Calculate potential savings

Complete Step 1 and your estimate will appear here.

Energy production

kWh / year

Potential savings

£ / year

Monthly production (kWh)

*Calculations are based on official solar radiation data from the European Commission's PVGIS database.

**Estimated production accounts for a 14% system loss and assumes a vertical panel angle (90° inclination).

Shop with confidence

  • Free UK delivery

    Fast, tracked shipping at no extra cost.

  • 10-year warranty

    Microinverter guaranteed for a decade. Every component backed by its own warranty.

  • Expert support

    Free setup video call with every kit, plus support before and after you buy.

  • 30-day returns

    Changed your mind? Return your kit within 30 days for a full refund.

Product recommendations