Solar Panels or PV's (Photo Voltaic)

   PV's can divert excess energy to either your hot water tank or your car and possibly both. 
   PV's work great with EV's especially IF you can leave the car charging during the day. To do this you would need something like a ZAPPI charger, these divert unused energy to the car.

Not sure how many panels you need ? Batteries ? Battery size ? Check out garydoessolar.com it has a awesome online modelling app.

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Power Walls

   Storing electricty can be expensive many companies are now produce Power Walls to store excess solar, such as the Tesla Power Wall .They can also store cheap night rate electricity from the grid.

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​Solar PV vs Thermal

PV's

Pros

• Convert sunlight directly into electricity
• Can charge an Electric Vehicle directly
• Can charge a power wall directly
  

Cons

• Only 16-23% efficient
• Larger roof area required
• Storing the energy can be expensive as you need something like a £7000 Tesla power wall.
• Cant charge the car if you've gone to work in it

Solar Thermal

Pros

• 80-95% efficient
• does not require and expensive bank of batteries such as Tesla Power wall
• Low installation costs
• Can top up hot water with cheap rate night time electricity
• ​Small roof area required

Cons

• Requires hot water tank
• Cant charge a power wall or car​