Sigenergy SigenStor inverter and battery review - Updated April 2025
Sigenergy's new solar and battery products.
There's some pretty impressive stuff to unpack here.
If you prefer to watch, not read, here's a summary in a 5 minute video.
You'll see a lot of blue links below. Most go to specific Youtube videos made by Sigenergy.
Dimensions.
Design
An Energy Controller (hybrid inverter) sits on top of a stack of up to 6 batteries.
The batteries can be 5kWh or 8kWh in various CEC approved combinations.
(The 5kWh batteries aren't as cost effective per kWh of storage as the 8kWh)
The optional DC 12/25kW EV charger takes up one of the battery positions.
Wall mounting is only allowed for a maximum of 2 batteries otherwise it must be floor mounted.
(With WA bricks being mostly air, and not a lot of fixing holes on the Sigenergy wall mount bracket,
I'd say don't wall mount Sigenergy batteries at all).
Inverter models
Single phase hybrid inverter models, 5kW, 6kW, 8kW 10kW.
(5kW residential limit in WA)
Three phase hybrid inverter models, 5kW, 10kW, 15kW, 20kW, 25kW, 30kW
(15kW residential limit in WA)
Price
Sigenergy entered an already crowded inverter battery market in Australia mid 2024.
Considering the obvious quality and features of the product, their introductory low price was remarkable.
Nearly a year on the 'introductory price' seems to have become permanent, at least in Australia.
"Sigenergy are the fastest company on record to achieve #1 battery market share in Australia"
To me, that's bonkers.
Australian retailers and installers are notorious for being very slow adopters of new brands.
Gateway - the star of the Sigenergy show.
Taking nothing away from a very well designed and built inverter and battery, their star is the Gateway.
This wiring hub is for whole house backup during grid outages, and connection of other inverters, not just Sigenergy inverters.
There is a multi-function 'smart port' for connection of generators, hot water systems, ACs.
It is a UPS too, switching over from grid loss to backup in 0 m/s.
There's a manual changeover switch inside so if the inverter/battery/gateway were to fail, flick the switch.
The Gateway also contains the CTs needed for load monitoring so no need for a separate energy meter in the switchboard.
I've highlighted the CTs in red in the picture on this single phase Gateway picture.
(Confession time. I still haven't fully got my head around ALL the things that are possible with the Gateway).
The Gateway warranty has been increased to 5 years with a $150 option to extend it to 10 years.
Considering the Gateway costs about $2,000 and is so crucial, that seems like a good upgrade to me.
Tigo optimisers are now onboard
Not only have Tigo tested their optimisers and approved them for connection to Sigenergy inverters, but also,
the two companies have joined forces so that the Tigo data is available from within the MySigen app.
If you have Tigo optimisers on your Sigenergy system for shade mitigation or extending strings across multiple roof orientations,
you can now see the individual output and 'reclaimed power' of all of those optimised panels in the Sigenergy app.
You still need the full Tigo setup with CCA and Taps for this, so you could simply see that data in the Tigo app,
but it's just so much nicer to have everything visible under one system in my view.
AC EV chargers.
Sigenergy have 7kW chargers for single phase and 11kW and 22kW chargers for three phase
They are smart chargers that communicate wirelessly with the Sigenergy inverters.
That way you can never use the grid to charge your EV because the EV can ramp up and down depending on available solar.
Oversizing - with a battery
Sigenergy have informed their network in Australia as well as the Clean Energy Regulator that 200% oversizing is approved.
That's 200% on all their inverters, single and three phase, as long as voltage and current limits are not exceeded.
That means a 5kW inverter and battery can have 10kW of panels, a 10kW inverter 20kW of panels etc.
Shade beating algorithms
Global multi power point tracking can now be activated with all Sigenergy inverters.
This is especially useful if you have passing shade on your roof because the inverter will regularly scan for a new maximum power point.
What might have been the best power point 30 minutes ago may have changed with shade. This feature keeps on top of that.
MPPTs.
Talking of maximum power point tracking, but this time, just the regular MPPTs.
Sigenergy has 2 x MPPTs for the 5kW and 6kW single phase inverters and 3 for the 8kW and 10kW single phase models.
The 5kW three phase model has 2 MPPTs, the 10kW and 15kW has 3 MPPTs and the 20, 25 and 30kW models, 4 MPPTs.
Long strings, no parallels.
The three phase inverters are designed for long strings where the total voltage stays under 1000V
Unless the current of your panel choice is under 8A then you can't have parallel strings connected.
Most panels these days are 12-13A
Quality
Very robust build. Installers, clients, Facebook user and installer groups are saying the same.
Bollards
If there's any risk of the battery being struck by a vehicle it must have protection with bollard(s).
Nice that Sigenergy have recently released their own matching bollards as pictured below.
Compared to those rather ugly yellow and red 'Bunnings' bollards, if you have to have them, might as well have good looking ones.
MySigen app
You'll find the Sigenergy MySigen app in the usual stores.
There's also a web page portal, https://app-aus.sigencloud.com/
It's my favourite type of solar reporting app.
Very simple on the face of it which will suit most people, but plenty hidden away for those who like deep-diving.
Genius ideas from Sigenergy
Make all the inverters the same size.
A 5kW single phase inverter is the same size as a 30kW three phase model.
Sit them on top of a battery or stack of batteries that are also the same size.
A 5kWh battery, same size as an 8kWh battery.
Fit each battery with it's own battery optimiser and parallel connect them.
That way new can be added to old later on and it won't make a difference to the output of the new battery.
Each battery is charged, discharged and balanced independently of the others.
Other Sigenergy battery features.
Cell Chemistry Lithium Iron Phosphate (LFP), very much the safest for home use.
In-built temperature sensors and fire extinguisher in each battery module.
I'm pretty sure that they are 3.2V CATL 280Ah prismatic cells inside but don't quote me.
EV Charging..AC or DC
Sigenergy have 7kW single phase and 11 and 22kW three phase EV chargers.
Think of a Zappi charger but integrated into the system.
The charger is controlled by the Sigenergy inverter and whatever settings you chose.
Draw from solar only, battery and solar, battery, solar and grid, at what time.
Plenty of settings beyond those few just mentioned.
3 year warranties for the AC EV Chargers which seems pretty industry standard.
Sigenergy also have a DC charger
Up to 25kW of power going straight from the panels and batteries into your car.
The DC charger takes up the space in the stack of one battery.
See picture below of one of our recent installs with a DC Charger.
Installation is so much easier than a normal EV Charger that needs expensive AC cable runs and breakers.
It is also bi-directional (V2X) so you can run your home from your EV battery.
Or at least that's the theory. EV manufacturer warranties might say differently.
Artificial intelligence (AI)
The MySigen app you will use with Sigenergy has ChatGPT in-built.
VPP (Virtual Power Plant) ready? Yes
So who are Sigenergy?
Yes, Chinese, and the founder and CEO is ex-Huawei and Ascend AI, one of the largest AI companies in the World.
Reportedly he started up Huawei's solar division in 2011 and drove it to becoming World No 1 before leaving in 2020.
There's a lot of 'Huawei-like' things I recognise in the Sigenergy products.
Battery optimisers, fire extinguishers, even the identical AC plug and very similar appearance.
It seems that Tony Xu and his Sigenergy team have taken things a lot further than Huawei have done.
It's not hard to search Youtube for plenty of Sigenergy videos. Makes for interesting viewing.
Sigenergy have already had a lot of success and some very interesting installations in Europe.
If you are interested in some really large solar installs; Commercial, Industrial then Sigenergy scales up.
Inverters are paralleled together, as are stacks of batteries. On-grid or Off-grid.
Here's a quick video of a recent off-grid Australian install with 70kW of inverters and over 336kWh of battery storage.
That's 7 stacks of 6 x 8kWh Sigenergy batteries, with backup and a big generator connected on standby.
Can't wait for us to get to install some of these. They look so interesting.
The installation process seems very simple, and the finished job, very neat with all the cables hidden.
Sigenergy inverter (which can be wall mounted on it's own without batteries).
Inverter with 2 batteries. Can't say what size inverter or batteries as they all look the same.
A real life installation picture...
Sigenergy datasheet/brochures.
Sigenergy brochure
Sigenergy inverter datasheet.
Sigenergy battery datasheet
Sigenergy 1 phase backup Gateway datasheet.
Sigenergy 3 phase backup Gateway datasheet.
Sigenergy 1ph/3ph consumption / smart meters (included in backup box)
Sigenergy AC EV chargers
Sigenergy DC Charger/V2H/V2G (EV) datasheet (provisional).
Sigenergy inverter warranty (Australia).
Sigenergy battery warranty.
Sigenergy AC EV charger warranty.
Home Assistant integration with Sigenergy.
Click this link for Github instructions and downloads.
Sigenergy in the USA
It is branded as Pointguard.
Sigenergy Australia support number.
0452 417 654. A mobile number that goes to voicemail.
Leave a brief message and Sigenergy support will usually call you back within an hour.
or email
This review was written by Andrew MacKeith, Solar4Ever service manager since 2011.
Solar4Ever is located in Morley (Perth), WA 6062
