c/kWh
Total capacity
376 L
264 L fridge + 112 L freezer
Energy rating
5.5
Star rating index 5.64
Annual electricity use
233 kWh
Label figure (comparative energy consumption)
Estimated running cost
$77 / year
$6.41 / month ยท $769 over 10 years

20% less electricity than the median of 59 comparable 300โ€“399 L bottom-mount fridge freezer registrations (293 kWh a year). It uses less than 86% of them. At 33c/kWh that is about $20 a year less than the median, $198 over 10 years.

Uses 54% less than the maximum allowed for its size and type under the minimum energy performance standard (507 kWh a year MEPS level).

Cost = label kWh ร— 33c/kWh in NZD; change the price above to your tariff.

How efficient is it for its size?

kWh per year. Bar: the middle 80% of 59 comparable 300โ€“399 L bottom-mount fridge freezer registrations. Dot: this model (below the median). Hover or tab to a mark for its value.

Cohort: every currently registered 300โ€“399 L bottom-mount fridge freezer sold in New Zealand, counted once per registration. Star ratings already account for size through the GEMS adjusted-volume formula; this comparison is in raw kWh against models a buyer would actually consider instead.

Panasonic NR-BX421H running cost

Per month
$6.41
Per year
$77
5 years
$384
10 years
$769

233 kWh ร— 33c/kWh. No inflation or tariff change assumed. Fridges run continuously, so the label figure is a whole-year estimate under standard test conditions.

Capacity and compartments

Total gross volume
376 L
Fresh food (fridge) volume
264 L
Frozen storage volume
112 L
GEMS adjusted volume
464 L
fresh food compartment
264 L gross
freezer compartment
112 L gross

Gross volumes exclude shelving. Fresh food = fresh food, chill and cellar compartments; frozen = freezer, two-star and ice-making (zero-star) compartments. Adjusted volume weights frozen space more heavily and is what the government uses to set the star rating for the size.

Similar bottom-mount fridge freezers that use less electricity

Same type, total capacity within 12% of 376 L, at least 3% lower annual kWh.

ModelStarsEst. cost / yrCompare
Hisense HRBM418E417 L153 kWh/yr8$50
Hisense HRBM418D417 L187 kWh/yr7$62
Liebherr CNef 4315350 L187 kWh/yr6$62
Aeg 19CBSNV7376 L193 kWh/yr6$64
Aeg Titan376 L193 kWh/yr6$64

Fridges similar to the Panasonic NR-BX421H

ModelCapacityStarskWh / yr
Aeg Titan
same capacity, same door count, similar star rating
376 L6193
Aeg 19CBSNV7
same capacity, same door count, similar star rating
376 L6193
Chiq CBM395NBS6E
5% larger, same door count, similar external size, similar star rating
396 L6223
Chiq CBM39*N**6E
5% larger, same door count, similar external size, similar star rating
396 L6223
Fisher & Paykel RF402BLYX6
1% larger, same door count
380 L3361
Fisher & Paykel RF402BRYW6
1% larger, same door count
380 L3361

Same consumer type, total capacity within 12% of 376 L; ordered by closeness of capacity, then lowest annual kWh.

Other Panasonic models of similar size

ModelStarsEst. cost / yrCompare
Panasonic NR-BX421H376 L233 kWh/yr5.5$77
Panasonic NR-BX421B380 L299 kWh/yr4$99

Compare NR-BX421H with another fridge

Panasonic NR-BX421H specifications

Type
Bottom-mount fridge freezer
Configuration
Upright
Doors
2
Defrost
Variable defrost controller
Ice maker
No
Width
686 mm
Height
1,680 mm
Depth
695 mm
Annual energy (label)
233 kWh
Star rating index
5.644
MEPS level (maximum allowed)
507 kWh
kWh per adjusted litre
0.502
Country of manufacture
Vietnam

1 model numbers on 1 other registration. Variants registered separately can carry different star ratings and energy figures; check the registration number on the label.

ModelRegistrationStarskWh / yr
NR-BX421HZRF09645.5233

New Zealand E3 registration details

Registration number
ARF3667
GEMS registration id
172292
Status
approved, available (self-reported)
Registration expires
20 August 2030
Registered for sale in
Australia, Fiji, New Zealand
Family
โ€“
Designation
Refrigerator/freezer
Product class
Class 6
GEMS group
Group 5B: refrigerator-freezer, automatic defrost, bottom-mounted freezer
Regulatory standard
Greenhouse and Energy Minimum Standards (Household Refrigerating Appliances) Determination 2019
Test standard
AS/NZS IEC 62552.3:2018
Consumer type rule
GEMS group 5B (frost-free fridge freezer, bottom-mounted freezer) with one or two doors

Source: E3 programme registration data (EECA, New Zealand) (trans-Tasman E3 registration data published by DCCEEW on data.gov.au, CC BY 3.0 AU). Dataset published 25 September 2026; last checked 26 September 2026. Manufacturer: panasonic.com/au. How the derived figures are calculated.