The parties dispute how long the delays took, what created them and both say the other was mismanaging the project. Fletcher claims Electrix did not have enough staff for the job.
Fletcher's counter-argument is that Electrix misled it into believing Electrix could do the job for $17 million.
It says there was an agreement with an exact price, and although there was scope was to review and make changes, the general scope was clearly understood and agreed.
Electrix claimed that a very strong inference should be taken from the fact that while Fletcher Construction Co says the value of the job was restricted to several letters of intent, it kept paying Electrix and ended up paying more.
"There is no evidence offered by anyone from FCC as to why those further payments were made, or on the basis on which they were made," the company's closing submissions say.
Electrix documents also detail how the board of the French-owned company considered exiting the project in 2017, but was convinced by its New Zealand management to stay on and continue on a cost-plus contract basis.
Fletcher says some of Electrix's costs were caused by its own disorganisation.
Both sides had different expert witnesses which disputed how much the job was actually worth. Their evidence, which focused on cost and pricing information, has been kept secret due to commercial sensitivity.
The judge's decision has been reserved.
- BusinessDesk