Solar Panels

[Quickstatus]

Our system on average generates 11 MWh per year, and we feed in 8.5MWh. Our overall electricity bill are $500 per year, which when you include a network charge of $1/day, is ok.

Whats your annual average c/kWh (total bills / total consumption).
Include Amortise solar system over 10y at 5% interest and divide by 10

 

[JessicaTam]

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Some posts have been moved from the Member Chit Chat thread.
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[Denali]

.....which when you include a network charge of $1/day, is ok.

THIS drives Mr Denali to brinks of anger. $350 a year fee

 

[Denali]

...... - Penrith Solar, .....

We went via Nepean Solar and happy with them Home | Nepean Solar

We've since added three more battery modules to this system, easy to stack/add more to system

 

[Quickstatus]

$350 a year fee

And the fee is variable depending on the plan. So it really has nothing to do with 'Supply charges'....

What battery system?

 

[exceladdict]

We have been enjoying our solar covering a large majority of daily air con costs here in Perth (though a cloudy day today seems like it will be a poor generator). Have been wanting to use a full year of usage to calculate the need / potential savings from a battery.

My calculations are a Tesla powerwall 3 over its warranty period and if you maximise charging and discharging each day costs 50c to store and release each kWh. That's not including the cost of electricity required to charge it - from solar or grid.

Yeah the Tesla powerwall 3 installer - Penrith Solar, kept saying to me "once the battery is installed, all the power it supplies is free". .

I have used the same calcs. Even ignoring costs of generation, which are not always zero, dividing the cost of the battery by total warranted discharge capacity hasn't provided anything close to my point of comparison which is the WA synergy flat rate of ~32c/kWh.

One factor I'm yet to consider is some systems allow you to oversize by 100% if you have a battery connected e.g. 10kw of panels for 5kw inverter + battery, as opposed to 6.6kw of panels. This could, in theory boost generation by 50% while still being eligible for the meagre DEBS payback (2c /10c during peak). I'm mainly thinking about the early and late parts of the day before the panels are at peak generation.

 

[Denali]

And the fee is variable depending on the plan. So it really has nothing to do with 'Supply charges'....

What battery system?

From the paperwork, because I dont pay attention to this as its Mr Denali's thing, EDIT: have used Q.MAXX 410w panels..... battery solution, my recommendation is the Sungrow 3-phase 10kW inverter coupled ...

If you have more questions Im going to have to get Mr Denali down from his loft

 

[moa999]

old house FIT was 69c and now it's 4c

And dropping further it seems.
But yet to be seen in retail electricity where a ToU plan still treats 2pm as peak.

It does improve the ROI of batteries but it's still not great.
The batteries are yet to see the price war occuring in the EV car market.

Tesla's latest PW3 is actually more expensive than it's predecessor, though does have an 11kW inverter built in so slightly cheaper for new installs.

 

[Quickstatus]

One factor I'm yet to consider is some systems allow you to oversize by 100% if you have a battery connected e.g. 10kw of panels for 5kw inverter + battery, as opposed to 6.6kw of panels.

I have unlimited export with my 3 phase 25kW system (Ausgrid) - though the problem is that the street transformer is close to my house. Therefore the street voltage is highest at the transformer and for my house. It is common for my export voltage to hit 253V on the sunniest day. Sometimes the inverter will turn down its export if voltage exceeds 253V - typically for a few minutes.
My system is 20kW facing NE and 5kW (ground mount) facing NW as i dont have a NW roof that is not shaded.
The inverter is 25kW, as I dont ever get 25kW at any time, I could add panels to the NW system but not enough land there

Q-Cell

BYD is the brand behind it.

My existing inverter is not battery capable. So I cant just add batteries. I would need a second inverter.

 

[VPS]

And dropping further it seems.
But yet to be seen in retail electricity where a ToU plan still treats 2pm as peak.

It does improve the ROI of batteries but it's still not great.
The batteries are yet to see the price war occuring in the EV car market.

Tesla's latest PW3 is actually more expensive than it's predecessor, though does have an 11kW inverter built in so slightly cheaper for new installs.

Unfortunately for me to install a battery would cost $10k because in an apartment