NeoPower Black Diamond 315L Heat Pump Hot Water System
Model NA37-315A · Biggest rebate certificates and the highest published COP
NeoPower Black Diamond · pick your size
What are you replacing?
Fully installed in VIC · rebates already off
No obligation · We reply within one business hour
The maths
Where $1,624 of your price disappears
Three separate VIC incentives stack on this unit when you're replacing a electric storage. We lodge every form — you never chase paperwork or wait on a cheque.
How the rebates workInterest-free loan option too
16 certificates
Depends on the unit you're replacing
Running costs
About $1,232 a year back in your pocket
Based on a four-person Victorian household — roughly 4,500 kWh of water heating a year at 30c/kWh. At a COP of 4.33, this unit only needs about 1,039 kWh to do the same job. Run it on the timer through the middle of the day and most of that comes off your roof, not the grid.
Got rooftop solar?
Time the heat pump to soak up your daytime output
Every kWh you self-consume is worth 30c instead of the 3c feed-in you'd get for exporting it — that's the solar saving baked into the numbers below.
Your estimated hot water bill
down from $1,350 on an old electric tank
$1,232
Saved per year vs electric
$662
Saved per year vs gas
1.1 yrs
Payback after rebates
3.3 t
CO₂ avoided per year
Over 10 years
$12,325
Estimate only — your actual bill depends on tariff, climate zone, solar system size and how much hot water the household chews through.
Spec sheet
Every number, straight off the data plate
Manufacturer-published figures. Anything we can't verify is shown as a dash rather than guessed.
- Model number
- NA37-315A
- Series
- Black Diamond all-in-one
- Tank capacity
- 315 L
- Suits household
- 4–6 people
- Net dimensions
- Ø620 × 1979 mm
- Packed dimensions
- 700 × 700 × 2119 mm (with pallet)
- Net / gross weight
- 127 / 145 kg
- Warranty
- 6 yrs all system parts · 2 yrs labour
- Heating capacity
- 2.9 kW (air 20°C/15°C, water 15→55°C)
- Power input
- 0.67 kW — COP 4.33
- Power supply
- 220–240 V / 50 Hz, single phase
- Heat pump max input / current
- 1,050 W / 5.0 A
- Backup element
- 1,500 W / 8.0 A
- Hot water production rate
- 65 L/hr
- Refrigerant
- R290 / 400 g (natural, very low GWP)
- Noise
- 42 dB(A)
- Working ambient range
- -7°C to 43°C
- Corrosion protection
- Three sacrificial anodes
- Control
- Smart colour touch screen + Wi-Fi (Smart Life / Tuya app)
- Tank capacity
- 315 L
- Suits household
- 4–6 people
NeoPower Black Diamond
1 kW in, 4 kW out — and three anodes to boot
The Black Diamond is NeoPower's workhorse all-in-one, built by IMACA out of Scoresby in Melbourne's east (est. 2010). R290 natural refrigerant, a published COP of 4.33, a smart touch screen with Wi-Fi, and triple anode corrosion protection — a fair bit more insurance than the single anode most tanks ship with. Rated to keep pulling heat out of the air down to -7°C.
Four operating modes
- Standard mode
- Heat pump only, sitting at 60°C by default and adjustable from 15–60°C. The everyday setting for most Melbourne homes.
- Economy mode
- Heat pump only at 55°C with a 10°C restart differential — fewer cycles, lowest running cost. Pair it with a daytime solar timer.
- Hybrid mode
- Heat pump lifts the tank to 60°C, then the 1.5 kW element carries it up to the set point (default 65°C, up to 70°C). Handy for a full house or a cold snap.
- Element mode
- Element only, 65°C default and up to 70°C. Your backup if the compressor is ever out of action.
Warranty
- All system parts
- 6 years
- LabourFrom the date of installation
- 2 years
1 kW in, 4 kW out
A published COP of 4.33 at 20°C air — around three times cheaper to run than a conventional electric or gas tank, and NeoPower reckon up to 75% off your hot water bill.
R290 natural refrigerant
400 g of propane with next to no ozone impact and an extremely low global warming potential — a world away from the older synthetic gases plenty of brands still run.
Triple anode protection
Three sacrificial anodes instead of the usual one. That's proper insurance in Melbourne's harder water areas and means less fiddling down the track.
Quiet at 42 dB
Quiet enough to sit down a narrow side of the house without the neighbours or the kids' bedroom copping it.
Touch screen + Wi-Fi
Smart colour touch panel on the unit plus the free Smart Life (or Tuya Smart) app on Android and iOS to schedule, boost and monitor from the couch.
Works down to -7°C
Rated -7°C to 43°C ambient, so it keeps pulling heat out of the air through a frosty Victorian morning without leaning on the element.
Sizing and footprint across the range
| Model | Tank | Suits | Size (Ø × H) |
|---|---|---|---|
| NA31-210A | 210 L | 1–2 people | Ø620 × 1582 mm |
| NA32-260A | 260 L | 2–4 people | Ø620 × 1809 mm |
| NA37-315A | 315 L | 4–6 people | Ø620 × 1979 mm |
Sizing is a guide only — fixture flow rates and how your household showers make a difference. We'll sort the right size on the site visit.
Straight talk
Our honest take on NeoPower
- Published COP of 5.4 — top of the pack, which drives big STC and VEEC counts
- Variable-speed inverter compressor instead of on-off cycling
- 7-year tank and 5-year compressor cover, R290 natural refrigerant
- Colour touch screen, Wi-Fi app control and Modbus smart-home integration
- Labour cover is 2 years unless it's installed under Solar VIC (then 5)
- Heat pump stops at -7°C ambient before the element steps in
- Newer 2.0 hardware, so less long-term field history than the legacy names
How it happens
From quote to hot water in about a week
Quick chat
Tell us what you're replacing and where it sits. Fixed price back the same day.
Rebate paperwork
We check eligibility and lodge Solar Victoria, STCs and VEECs for you.
Install day
Old unit removed, new one plumbed and wired. Usually done inside a day.
Aftercare
Warranty claims and servicing handled through us — one number to ring.
Owners
What Victorians say
"Swapped our old electric tank. The bill dropped straight away and the crew sorted every rebate form."
Sarah M. · Melbourne
"Reckoned it'd struggle in winter — it doesn't. Water's hot on frosty mornings and you can barely hear it."
James T. · Geelong
"Price was exactly what was quoted. No surprises, rebates applied upfront. Easy."
Priya K. · Ballarat
FAQs
Questions we get asked
Want this one at $1,366 installed?
Send us a couple of details and we'll confirm your rebate eligibility and lock the price in writing. No sales pressure, no obligation.
Fully installed · incl. rebates
$1,366