Genesis

1. Oct 2026

First measured October 2026.

1. Toast Electric, 0.78 MB
2. Electric Kiwi, 1.55 MB
3. Powershop, 1.57 MB
4. Meridian, 1.63 MB
5. Contact, 1.68 MB
6. Octopus Energy, 1.74 MB
7. Lodestone, 1.78 MB
8. Ecotricity, 2.01 MB
9. Grey Power Electricity, 2.32 MB
10. Genesis, 2.96 MB
11. Pulse, 3.75 MB
12. Nova, 3.93 MB
13. Mercury, 7.18 MB

1. B
2. D
3. D
4. D
5. D
6. D
7. D
8. E
9. E
10. F
11. F
12. F
13. G

LightestHeaviest

• Genesis

• Phone

  3.8 MB

• Laptop

  3.9 MB

First visitiReturningi

1. Homepage

   /

   First visit

   Phone 3.8 MB

   Laptop 3.9 MB

   Returning

   Phone 0.16 MB

   Laptop 0.21 MB

2. Plans

   /for-home/products

   First visit

   Phone 3.8 MB

   Laptop 4.2 MB

   Returning

   Phone 0.15 MB

   Laptop 0.40 MB

3. Moving house

   /for-home/move-house

   First visit

   Phone 3.9 MB

   Laptop 3.9 MB

   Returning

   Phone 0.14 MB

   Laptop 0.19 MB

4. Power outages

   /help/outages

   First visit

   Phone 3.8 MB

   Laptop 4.0 MB

   Returning

   Phone 0.21 MB

   Laptop 0.26 MB

5. Contact

   /help

   First visit

   Phone 3.7 MB

   Laptop 3.9 MB

   Returning

   Phone 0.12 MB

   Laptop 0.14 MB

• Genesis’ own files

  This website

  2.6 MB69%

• Google Tag Manager

  Tag manager

  0.58 MB15%

• Facebook

  Advertising and social

  0.25 MB6%

• TikTok

  Advertising and social

  0.16 MB4%

• 7 more companies

  Evergage, Analytics, 0.05 MB
  LinkedIn Ads, Advertising and social, 0.02 MB
  Google Analytics, Analytics, 0.02 MB
  Quantcast, Analytics, 0.01 MB
  Cloudflare, Utility, 0.01 MB
  Hotjar, Analytics, 0.01 MB
  Google/Doubleclick Ads, Advertising and social, 0.01 MB

  0.14 MB4%

• Unknown source

  0.08 MB2%

• Scripts

  2.9 MB

• Fonts

  0.32 MB

• Images

  0.23 MB

• Styles

  0.21 MB

• Other

  0.10 MB

1. Script · Genesis

   7305-fb91729aaaf1cb11.js

   Every page

   0.52 MB

2. Script · Genesis

   7305-147e15b2dcfbcc69.js

   Homepage and 2 more

   0.52 MB

3. Script · Genesis

   genesisenergy.co.nz/metrics

   Every page

   0.22 MB

4. Script · Genesis

   4502-ce2b1bbf8b3bf5a1.js

   Every page

   0.21 MB

5. Script · Genesis

   6949-fd75ffe7e6889a6d.js

   Homepage and 2 more

   0.21 MB

Fix

Nothing a visitor would notice

Choice

Removes or delays something

Worked out on a phone and a laptop. The icons show where each saving applies.

1. Fix

   Ship less of your own code: scripts and styles that did not run while the homepage loaded

   Every page · Genesis

   up to 0.82 MB

2. Choice

   Check every marketing tag still earns its place: 8 companies

   Every page · several companies

   up to 0.39 MB

3. Fix

   Compress 15 of your own text files

   Every page · Genesis

   at least 0.22 MB

4. Fix

   Cut 5 fonts down to the characters used

   Every page · Genesis

   up to 0.17 MB

If this website had 100,000 page views a year, they would cause about 27 kg of carbon emissions.

Built to grade A (under 0.53 MB a page), the same page views would cause about 4.8 kg.

A grade C badge needs a typical page under 1.41 MB. Genesis’ is 2.96 MB.