Wellington Solar Power Generation and Energy Storage

Solar performance over various months of the year is of interest given that New Zealand is a winter peaking electricity system, with peak demands experienced during winter mornings and evenings. Combined with this is the typically lower hydro generation during the winter, resulting in less energy available and higher prices.

However, for both Wellington and Eraring, the estimated daily heavy vehicles are similar which indicates the estimated Wellington BESS heavy vehicle generation is probably slightly conservative. As such, the TIA estimated light and heavy vehicle movements are considered to be accurate.

The light traffic of Wellington BESS is slightly less than Eraring, given Wellington is a smaller project. However, for both Wellington and Eraring, the estimated daily heavy vehicles are similar which indicates the estimated Wellington BESS heavy vehicle generation is probably slightly conservative.

Upgrade of the TransGrid Wellington Substation, which will include a southern bay extension to accommodate an additional 330 kV switch bay and relocation of security fencing.

The land is located within the former Wellington Local Government Area, and the Wellington Council Section 94A Developer Contribution Plan 2012 is applicable. Levies are payable at the rate of 1% of the proposed development cost. Given the proposal has a capital investment value of over $30 million, the applicable levy would be over $300,000.