In a report, considered at a Toitu museum board meeting on Wednesday, Ms Evans said that savings continued to be made, and "good practices" had been enacted after the 2016 audit.
In the financial year until March 2018, $41,000 had been saved, and in the previous financial year, $56,000 was saved.
The museum's "building management system" (BMS) had now been fully commissioned after a 2016 upgrade, which should result in "further continuous improvement", she said in the report.
From January to March this year, overall energy use was high, due to January being the hottest month recorded in Dunedin.
Electricity use was up 27% compared with the previous January, because of "additional cooling and dehumidification requirements".
Even with this extra load, the electricity use was still less than in 2016, the year before changes were made to the building management system.
As requested by the Dunedin City Council, lpg usage in the DCC-owned museum had been reduced.
And in January (2018), lpg usage was "zero" because of a trial in which the lpg-fired boiler was turned off, saving about $2000.
Extending this trial across all of summer and into autumn and spring could result in a potential $10,000 annual saving, for a small investment to provide modern electric heaters in part of the museum.
The last remaining non-LED lights in the museum, in the non-public spaces, were being replaced with LED fittings.
These lights had much lower energy usage and produced no ultra-violet radiation, and thus were "better for object conservation", she said.
Cr Rachel Elder acknowledged there were continuing savings from the changes.
Ms Evans added that, by switching to much longer-life LED lighting, there was also "a huge saving in terms of labour", that would have been required to change older-style light bulbs.
An event organised at the Toitu Otago Settlers Museum and linked to the iD Dunedin Fashion Week had proved a "fantastic night", Ms Evans said on Wednesday.
She told the museum board meeting it had been "really good" to work with Kai Tahu designers Darleen Gore, Fiona Clements, and Amber Bridgman, and iD Fashion organisers over the iD "Associated Event" last month.
The museum event had showcased the work of the three designers, she said.
A small photographic display which opened at the museum last year celebrated Kai Tahu's continuing relationship with the museum.
The exhibition, titled Toitu te Whare Taoka, opened in the NZR Lounge on November 28, and celebrated the fifth anniversary of the completion of the museum's redevelopment project, a recent report said.
It ran until May 22.
