The question is where is the PV located and how to minimise gird losses in the network. Urbanisation isn't seen as a positive by many people, but centralised energy demands can reduce losses and smart decentralised rural village smart localised cluster grids, in my opinion, is one direction that can be taken.

I think PV need for surface will decrease dramatically and with the help of graphene and the new generation of supercapacitors we will be able to get energy from sun and directly use it in our buildings, no matter if they are on rural villages or in large cities.

So, no energy networks in the future and no wires but buildings that directly get energy from sun and use it.

Best regards.

In addition to the use of solar photovoltaic in building in big or small cities and in towns for heating and electricity generation, the use of solar photovoltaic is more useful in rural areas or small towns, villages and cities not big in size. However, in countries with sun all year, the use of solar photovoltaic, in addition to the use other energy sources for the generation of electricity, is a good option that cannot be ignored by governments and the energy industry representatives.

Wiring losses are determined by cable length, cable diameter, and the current.

If your sole aim for using PV is to reduce wiring losses you should apply it first at locations far away from generation, with an undersized grid and where the diurnal pattern of demand matches that of the PV power supply, or where the diurnal pattern of the demand can be made to match that of the PV power supply.

Well it depends to many factors

Load power

Cable length

Cost

Grid connected or island vilages.

Most of losses accures in cables so the length of cable is very important. However, sometimes it is better to accept some losses in your system because of economic reasons.

Rural areas are the good place to start with. The most important factors to be considered in this case are the transmission and distribution losses. This losses are generally high in rural distribution where the consumers are not close to each other. The Wireless Power Transmission method is also proposed based on this.

The so called "losses" (or unwanted energy transformations) appear in the phases of

Transformation - DC to AC

Transformation to and Transportation as High V AC

Retransformation and final Transportation Low V AC

Retransformation to DC (loading devices for mobile/pad and laptop e.g.)

In big agglomerations there is simply not enough space to meet demand by use of PV. In rural areas you might also stay in DC levels reducing losses or charging battery packs (lead/acid or even H) immediately - which would give support in the usual time differential of production and consumption.

I think the answer should be large cities in order to reduce the wiring losses particularly. As in the case of large cities, the land is expensive thereby the people live in small areas and the houses are nearer to each other like apartment flats in a building and residential colonies. Therefore the wiring cost per user would be reduced in cities. Additionally, more number of user can be accessible to the green solar power. The consumption of electricity is also more in cities in comparison to the rural areas so again it would be beneficial and efficient to start with the large cities for grid connected solar power.