UK solar households could face bigger bills under controversial new grid charge plans

The U.K.’s residential solar sector is facing further cost pressures following the publication of new plans by energy regulator Ofgem to increase network charges for PV households.

The plans are part of a wider overhaul of the U.K.’s electricity network, specifically how it is funded, by 2020. households currently pay an average of around £120 a year towards maintaining the grid. This figures is levied as part of the unit rate that is charged by utilities for electricity that is supplied to homes via the national grid.

In short, homes that buy more power contribute more in upkeep towards the grid. Solar households obviously by less power from the grid because they are able to generate their own electricity for much of the day. Hence, their overall financial contribution to grid upkeep is less than average.

Ofgem is now arguing that this is an unfair situation, particularly in winter when households with solar panels installed will still be as reliant on the national grid as non-solar households.

“We want to make sure that all users pay a fair share of the costs, even if they are only using the networks when their on-site generation is not producing electricity,” said Ofgem senior partner Andrew Wright. The Ofgem proposals are to either make all households pay a fixed charge for connection to the National Grid, or alternatively to link the charge to the maximum capacity drawn from the grid at peak times. If the latter model is adopted, solar homes are likely to pay more than they currently do, while also resulting in lower bills for non-solar consumers.

Another controversial proposal outlined by Ofgem would be to impose a fee on households that want to fast-charge their electric vehicles (EVs) at home during peak times. The regulator’s concerns are that EV charging during peak hours will deliver additional strain on to the grid, thus necessitating costly upgrades in the region of billions of pounds.

“When one set of consumers pays less, it increases charges for others, including those that are in vulnerable circumstances,” added Wright.

If the proposals are enacted they could impact up to one million households that currently have solar panels installed. While some homeowners enjoy favorable FIT rates, many of the newer installations have very little in the way of subsidy, meaning such regressive charges could have a net negative financial impact on their investment.