Right-sizing the grid connection: why bigger isn't safer

It is tempting to reserve a large grid connection 'to be safe'. In practice, over-specification inflates connection charges, reinforcement costs and lead times — often for capacity that is never used.

The discipline that separates a bankable design from a cautious one is honest demand modelling: real diversity factors, sequenced load growth, and a clear view of what storage or load management can defer.

Where the money leaks

Three patterns recur: simultaneity factors copied from a template, future phases priced as if they were day-one load, and standby plant sized without interrogating the actual critical list.

Each is fixable with measurement and a willingness to challenge the brief — which is exactly where an independent advisor earns the fee.

A practical test

Before signing a connection offer, ask: what is the P90 peak demand, what defers it, and what is the cost of being wrong in each direction? If those answers aren't written down, the connection isn't sized — it's guessed.