We have now began to add "mini off grid kits" which are ATS systems.

Whats a ATS? this allows you to switch between solar and grid power at home on any circuit.

Benefits:
Not grid parallel - No paperwork, grid down your still up.
switch between the two sources, Lower your bill.

Cons:
Requires some wiring that can be confusing.

Class - lesser Modified Circuit 
Original should remain intact without change, Grid is junctional at the ATS.
Earth bonding

Purpose:
The idea here is that the solar is a standalone unit, inverter and battery provided in the kits as well as the solar panels. You would  remove the  circuit wiring in the CU and place these in the ATS output -  we have moved to DIN mounted ATS as this means that the wiring moves within the CU rather than having to pull out wires and bridge.
The solar power is provided from the inverter and if the battery and solar do not provide power the ATS will change to grid supply.

Partial Solar installation. Ideal to run lights or lower power sockets ( depending on inverter) or outbuilding /workshop

Difficulties
Earth bonding - 
Location of the solar array, battery and inverter to the CU. Will need to be housed.
House wiring may not reach across the CU to ats.

Cost effective?

3kw/5.1kWh/1.27kwp £1,700
5Kwh@0.29= £1.45 (£529 PA)
= 3.2 years ROI

We will offer a Recycle option to make this more cost effective,  Circ £1,300 (ROI 2.4 years)

Talk about option and issues here!