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Home battery · RoyPow · CEC approved July 2025

RoyPow 5*RBmax3.8MH

A 17.66 kWh home battery.

Installed in Perth, after rebates: ~$11,505; Typical estimate — your own quote will vary
WA Battery Scheme rebate: Depends on your inverter; The scheme needs a Synergy-approved inverter — we don't know yours
Usable capacity: 17.66kWh; Between the smaller home and medium home bands

Datasheet (PDF)See the whole RBmax3.8MH series series

What we can tell you

Read from the figures on this page. No review written yet.

17.66 kWh sits between the smaller home (10–15 kWh) and medium home (20–30 kWh) bands.
It is CEC-approved, which is a condition of both the federal STC discount and the WA Battery Scheme.
We can't score it: a value score needs a price and full specs, and without them any number would be guesswork.

Key specs, in plain terms

The numbers that matter for a home. The full datasheet is below.

Usable capacity How much energy it stores for you to use: 17.66kWh
Continuous power How much it can run at once — most of a home, but not everything at full tilt: 6kW
Round-trip efficiency How much of the energy you store comes back out: 96%
Depth of discharge You can use the whole battery, not just part of it: 100%
Warranty 80% of capacity guaranteed at the end of it: 10yr
Battery chemistry Lithium iron phosphate — the long-cycle-life type: LFP

Full datasheet

Every figure on file for the RoyPow RBmax3.8MH series, by section.

Full datasheet, by section
Specification	Value
Cell & chemistry
Chemistry	LFP
Capacity & power
Nominal capacity	19.2 kWh
Usable capacity	17.66 kWh
Continuous power	6 kW
Peak power	17 kW
Depth of discharge	100%
Round-trip efficiency	96.2%
Nominal voltage	384 V
Lifespan & degradation
Capacity retained at year 10	80%
Warranted throughput	20 MWh
Modularity & stacking
Modular / stackable	Yes
Maximum stack	0 kWh
Backup & grid services
Backup capable	No
VPP ready	No
Physical
Dimensions (H×W×D)	200 × 850 × 550 mm
Weight	55 kg
IP rating	IP65
Operating environment
Operating temperature	-10°C to 55°C

Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.

Documents

Warranty and support

Warranty terms and Australian support structure.

This warranty covers product defects for 10 years, allowing one transfer. Damage from unauthorized installation voids warranty.

Duration

years

Throughput

MWh

Max Temp

55°

celsius

Max Backup

Level 0

No Backup

Australian support structure

Not verified

We have not verified this brand's Australian support structure. Confirm warranty arrangements with the manufacturer or your installer.

Perth heat

Rated to 55°C, which covers Perth's hottest days.

Key warranty terms

•Depth of Discharge: 100% usable capacity
•Round-trip Efficiency: 96% rated
•Annual Degradation: ~2.5% per year expected
•Installation: Must be installed by SAA-accredited installer
•Operating Conditions: -10°C to 55°C

✓ TransferablePro-rata≥80% capacity at year 10

Warranty Document Datasheet Compare Warranties

WA Battery Scheme eligibility

Check eligibility

Synergy SSL inverter pairing, VPP participation and state-rebate qualification for this battery. Rebate and STC amounts are shown in the pricing panel.

CSIP-AUS compliant
Inverter must be CSIP-AUS compliant under the current WA framework.
Synergy SSL approved inverter
Needs pairing with a Synergy SSL approved inverter.
VPP activation ready
VPP activation requires a Synergy SSL approved inverter.
WA Battery Scheme rebate
Requires Battery Rewards participation under the current WA framework.
Synergy Battery Rewards
Requires a CSIP-AUS compliant system and reliable internet.
Interest-free loan
Not eligible for interest-free financing.

Under current WA rules, new rebate applications require VPP enrolment and CSIP-AUS compliance. How the scheme works · Estimate VPP earnings

About ROYPOW

View Full Profile →

Years in AU Market1+ years

Local SupportNot verified

CEC-Listed Products20 models

1yr AU

CEC-approved products since 2025

1 year in the Australian market

Fault & error codes — RoyPow RBmax3.8MH series

Extracted from the installation manual

10 documented

Showing 10 of 10. The official install manual is the authoritative source — always confirm before acting.

1criticalCall your installer
Manual (PDF)
BuckBoost1 rapid OC
Likely cause
Detect BuckBoost1 current greater than 40A, lasting 468.75us
What to do
Detect whether there is a short circuit on the output side of the optimizer
2critical
Manual (PDF)
BuckBoost2 rapid OC
Likely cause
Detect BuckBoost2 current greater than 40A, lasting 468.75us
3critical
Manual (PDF)
Input curr. rapid OC
Likely cause
Detect battery current greater than 68A, lasting 468.75us
4criticalCall your installer
Manual (PDF)
Bus rapid OV
Likely cause
Detect bus voltage greater than 1030V, lasting 3ms
What to do
Turn off the optimizer, wait for about 1 minute, and then turn it back on to check whether the problem is solved.
5criticalCall your installer
Manual (PDF)
Bus volt. OV
Likely cause
Detects that the average value of bus voltage is greater than 1020V and lasts for 200ms
What to do
Restart and check whether the problem is solved.
7criticalCall your installer
Manual (PDF)
BuckBoost1 RMS OC
Likely cause
Detect that the RMS of current of BuckBoost1 is greater than 30A and lasts for 200ms
What to do
Check whether the optimizer is overloaded. If the problem is still not solved, please contact after-sales service.
8critical
Manual (PDF)
BuckBoost2 RMS OC
Likely cause
Detect that the RMS of current of BuckBoost2 is greater than 30A and lasts for 200ms
10warningCall your installer
Manual (PDF)
Input volt. OV
Likely cause
Detects that the average value of battery voltage is greater than 570V and lasts for 200ms
What to do
Check whether the battery pack voltage is within the normal input range.
6warningCall your installer
Manual (PDF)
Bus volt. UV
Likely cause
Detects that the average value of bus voltage is less than 450V and lasts for 200ms
What to do
Please check whether the optimizer is overloaded.
9warning
Manual (PDF)
Input curr. RMS OC
Likely cause
Detects that the RMS of battery current is greater than 60A and lasts for 200ms

What it costs in Perth

$15,894

Typical installed price, before rebates

WA Battery Scheme: Depends on your inverter
Federal STCs: −$4,389
You’d pay about: $11,505

The WA Battery Scheme (up to $1,300) needs a Synergy-approved inverter and VPP enrolment. We don't know which inverter you'd pair this with, so it isn't deducted above — ask your installer. STCs assume about $39.9 a certificate. Estimates only; your quote will vary.

Explore your options

Which size band is your home?

Usable capacity, for one battery system

Smaller home: 10–15 kWh
Medium home: 20–30 kWh
Big home: 30–40 kWh
Very big home: 40+ kWh

This battery sits between the smaller home and medium home bands. The WA rebate caps at 10 kWh, but that is a rebate limit, not a sizing guide.

Does waiting change the rebate?

Estimated federal rebate (STCs) for this 17.66 kWh battery

How it compares

The RoyPow 5*RBmax3.8MH against the closest-sized batteries from other brands.

Specification	RoyPow 5*RBmax3.8MHRoyPow	Green ESS Mint 4870-5SGreen ESS	BYD HVB 17.8BYD

Usable capacity?	17.66 kWh	17.664 kWh	17.82 kWhbest value
Continuous power?	6 kW	Not verified	Not verified
Peak power?	17 kW	Not verified	Not verified

Round-trip efficiency?	96%best value	92%	92%
Warranty	10 years	Not verified	Not verified
Chemistry	LFP	LFP	LFP

Specs from the CEC register and datasheet enrichment. Indicative — confirm exact figures with your installer.

More from ROYPOW

Other CEC-approved products from ROYPOW available in Australia.

ROYPOW Inverters

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10 kW · 3φ

SUN12000T-E/I (AS4777-2 2020)

12 kW · 3φ

SUN15000T-E/I (AS4777-2 2020)

15 kW · 3φ

SUN3000S-E/I (AS4777-2 2020)

3 kW · 1φ

SUN3600S-E/I (AS4777-2 2020)

3.6 kW · 1φ

SUN4000S-E/I (AS4777-2 2020)

4 kW · 1φ

View all ROYPOW inverters

View full ROYPOW manufacturer profile

Want to take the next step?

Get a quote from an installer from our network that covers your area. You choose whether to act on it. No obligation.

This model is one entry in the desk's index of solar batteries for Perth — every CEC-approved battery on one comparable dataset.

Product Information Disclaimer:

Product specifications, pricing, and availability are subject to change without notice. We make no warranties regarding product performance, longevity, or suitability for your specific needs.

Always verify specifications with the manufacturer and installer before purchase. Warranty terms are set by manufacturers and may have conditions not disclosed here. Battery performance degrades over time.