Thread: Power prices, gas prices- ouch or Solar perhaps?

Hi In New zealand where we dont have as good a range of battery oprions , we have BYD and tesla powerwall among others.. Telsa powerwall they want NZ $ 18500...=AU$15500 .... Been looking around at offered the following as the "cheapest option...
" Price to remove your existing Fronius grid tied inverter and replace with a Sigenstor 6kW inverter with 10kWh
battery. Price includes all materials, labour, inspection and travel."
price NZ dollars 13500= AU$11500.00
seeing mixed reviews on the austrlian forum as very little information here

Anyone had any experience with this brand?
learned not to be the first off the block with stuff so trying to do my research!!

any feedback appreciated

Originally Posted by sashadidi

Hi In New zealand where we dont have as good a range of battery oprions , we have BYD and tesla powerwall among others.. Telsa powerwall they want NZ $ 18500...=AU$15500 .... Been looking around at offered the following as the "cheapest option...
" Price to remove your existing Fronius grid tied inverter and replace with a Sigenstor 6kW inverter with 10kWh
battery. Price includes all materials, labour, inspection and travel."
price NZ dollars 13500= AU$11500.00
seeing mixed reviews on the austrlian forum as very little information here

Anyone had any experience with this brand?
learned not to be the first off the block with stuff so trying to do my research!!

any feedback appreciated

I saw them at a show in Melbourne. Along with Dozens of others!


Google Gemini


Two notes from that

1. While generally praised for its sleek "Tesla-like" aesthetics and fast commissioning (installers can set it up in under 15 minutes), there were some ACCC safety recalls in late 2025 regarding overheating terminals on certain single-phase models due to installation errors. Ensure any unit you purchase features the updated 2026 terminal design and is installed by a certified technician
2. For a full backup of your home during a blackout, you will need to pair this inverter with the Sigen Energy Gateway

My Growatt does that Off Grid cable out of the box. The Price seemed a bit steep? the Redflow batteries I had almost 15 years ago were 10kWh and about 10k aus. I think they should be a lot cheaper now.

Originally Posted by sashadidi

Hi In New zealand where we dont have as good a range of battery oprions , we have BYD and tesla powerwall among others.. Telsa powerwall they want NZ $ 18500...=AU$15500 .... Been looking around at offered the following as the "cheapest option...
" Price to remove your existing Fronius grid tied inverter and replace with a Sigenstor 6kW inverter with 10kWh
battery. Price includes all materials, labour, inspection and travel."
price NZ dollars 13500= AU$11500.00
seeing mixed reviews on the austrlian forum as very little information here

Anyone had any experience with this brand?
learned not to be the first off the block with stuff so trying to do my research!!

any feedback appreciated

Do have a watch of the videos by "your energy answers". He explains how the warranties work. You would need to interpret that in an NZ context.

I think having a solid warranty from people who will be around is probably worth paying for.

Originally Posted by NavyDiver

I saw them at a show in Melbourne. Along with Dozens of others!


Google Gemini


Two notes from that

1. While generally praised for its sleek "Tesla-like" aesthetics and fast commissioning (installers can set it up in under 15 minutes), there were some ACCC safety recalls in late 2025 regarding overheating terminals on certain single-phase models due to installation errors. Ensure any unit you purchase features the updated 2026 terminal design and is installed by a certified technician
2. For a full backup of your home during a blackout, you will need to pair this inverter with the Sigen Energy Gateway

My Growatt does that Off Grid cable out of the box. The Price seemed a bit steep? the Redflow batteries I had almost 15 years ago were 10kWh and about 10k aus. I think they should be a lot cheaper now.

Hi thanks .. yes I read about those recalls which may explain the price...... sadly we dont have as much choice here and knowledge, yes long term is a thing... no so keen on telsa for price and musk as such
i looked at growatt here example:
2024 Growatt 10KWH 24V 3kW Off Grid Carbon Battery Solar Kit

also this battery : Dyness Powerbox Pro | Outdoor Solar Battery 10kwh | MEDA Solar NZ

will make inquires
thanks for feedback
much appreciated

Originally Posted by Captain_Rightfoot

Do have a watch of the videos by "your energy answers". He explains how the warranties work. You would need to interpret that in an NZ context.

I think having a solid warranty from people who will be around is probably worth paying for.

thanks you will do

Screenshot_18-3-2026_11564_server.growatt.com.jpg

Just reviewing - Power bill was supply charge only as roughly 98% of grid input is in the 11:00 - 14:00 free power period. The 2%ish was fast charging my car overnight with almost all the 30kWh batteries and some grid as the 7kWh car charger is a bit over the 5kWh inverter. The overnight rates are cheap anyway.

With the battery rebate scheme changing the economics has changed a bit I assume. I would be happy not to export at all if I could.

The system is fine yet not AI integrated smart yet making that a bit of fiddling I could not be bothered to do daily!.


When software updated to SMART I suspect I will be able to fine turn it to the weather, daylight hours and reduce even the free grid hours. The $0.01 export earnings more than cover the supply charge now.

I am assuming the 10 year warranty and assurance that the system has >60 working will see 'Total' system pay back happily

My home/car use from prior gas/power which was a bit higher due the car at about $2000ish power and $1000 ish gas per year is a sub three-year cost recovery $8,150.00.

Due to renewable electricity prices are starting to come down as much as 10 percent in Qld...Power prices set to fall, but Iran war casts long shadow over bill relief - ABC News