Help me understand how Solar is cheaper at home.

[boobook]

Interesting, Batteries in general were in the negative return on investment recently due to the volatile markets.

Out of interest, does below mean you would get 1 hour or so drawing 12.8kw with a 12.8kw/h charge?

Yep. Correct.

My use case is for aircon. It would use about 8kw for 20 mins then scale back to 2 - 3 kw so it is ok.

I am not convinced they have a positive ROI though.

I recently signed up with a supplier and now get 11c feed in. Batteries would have to be cheap to compete with that.

 

[Toyasaurus]

I still think looking at batteries as an ROI is not the right way.

Think of it as future proofing against the rising costs of power and backup when the power goes out.

Storms, lack of generating equipment, massive demand due to climate, etc.

ATM it`s the only way to beat the system.

The federal gov`t is looking at price capping on power, but it has to get the state gov`t to do it, they will have to pay massive penalty's
to power companies for breach of contract, so they will demand the fed`s pay up for that.
Robbing Peter to pay Paul.
Kinda suck`s since we are Peter and Paul.

When I did the ROI on my system it worked out to be about 12-14yrs.
That was as power prices stood 4.5yrs ago.
It should have come down quite a bit now as prices just keep going up.

 

[Rusty Panels]

11c feed in

Do you mind me asking who you're with and is that capped?

 

[Komang]

You guys lucky, here in perth only one supplay monopoly by synergy only 7c feed in
Total ripoff

 

[boobook]

Do you mind me asking who you're with and is that capped?

Simply Energy. Offer ID SIM424368MR

It is capped at 10Kw ( not KwH ) of export


Also Tango Offer ID TAN426131MR is attractive.
Same 10Kw export limit.

Only 10.4c per KwH Export but slightly less expensive use and daily rates.

I export $12 a day on a good day.

 

[boobook]

The results are (nearly) in for 2022.

I put in 18Kw of solar ( $11K) and replaced my gas ducted heating and evaporative cooling with ducted air conditioning, ($19K) A total of $30K approx.

So my gas bill for the year has been reduced by $2500
My Solar generated 21.4 Mega Watt hours ( 21,400Kwh) in 2022
Of that, I exported $1657.00 for credit. And used $1470 less electricity than I would have if I had no Solar. A total saving / credit of $3100 a year. My bill is a credit from about October to March. My best month was a credit of $172.00 ($84 use -$256 credit)

In other words, I am about $5600 a year better off. That's a payback of about 5 1/2 years -- including getting a new reverse cycle ducted air conditioner for every room in the house.

If I do the ROI on the solar only it's about 3 1/2 years.

On top of that I reduced my CO2 emissions by 22 Tons for the year or 33 Tons in total since I put it in. About the same saving as swapping my dirty diesel for an EV for 12 years.


Not too shabby. and my whole house is now airconditioned.

 

[Komang]

@boobook wish I can add more panel and inverter mine only approx 9,6MW per year with 5kw inverter.

 

[Kippie]

The results are (nearly) in for 2022.

I put in 18Kw of solar ( $11K) and replaced my gas ducted heating and evaporative cooling with ducted air conditioning, ($19K) A total of $30K approx.

So my gas bill for the year has been reduced by $2500
My Solar generated 21.4 Mega Watt hours ( 21,400Kwh) in 2022
Of that, I exported $1657.00 for credit. And used $1470 less electricity than I would have if I had no Solar. A total saving / credit of $3100 a year. My bill is a credit from about October to March. My best month was a credit of $172.00 ($84 use -$256 credit)

In other words, I am about $5600 a year better off. That's a payback of about 5 1/2 years -- including getting a new reverse cycle ducted air conditioner for every room in the house.

If I do the ROI on the solar only it's about 3 1/2 years.

On top of that I reduced my CO2 emissions by 22 Tons for the year or 33 Tons in total since I put it in. About the same saving as swapping my dirty diesel for an EV for 12 years.


Not too shabby. and my whole house is now airconditioned.

Way to go!

 

[Toyasaurus]

Hi guys.
I was searching through my solar list`s and I came across these new powerwall type battery banks.
If the batteries are made by Catl they should be good, biggest manufacture in the world.
I don`t know about the quality of the seller but I worked it out to about $550 per kwh.

Links.

8185.63AU $ 27% OFF|48v Powerwall Lifepo4 300ah 15kwh Standing Lithium-iron Phosphate Battery Pack For Solar Off/on-grid Energy Storage Can Rs485 - Battery Packs - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

Page Not Found - Aliexpress.com

 

[boobook]

It depends on your location, state, supplier, electricity use and roof orientation and shading,

In my case, in Melbourne, I save $5600 a year, and it has a payback of about 3.5 years. The reduction in my heating bill has a lot to do with that.
Go back and look at my posts on this thread. Others here had savings too.

I would say as a guess that the payback will be 3 - 6 years if you get full sun.

 

[RBJET]

On the other hand, I use next to no electricity majority of the year.
My peak energy usage is overnight during winter keeping my kids room warm when solar is useless.
It would take me years to pay it back.

 

[cookie64]

I have just had AGL drop my Feed in Tariff (FIT) from 0.44c p/kWh to 0.05c, looking at changing but the energy companies have us by the short & curlies, higher FiT but comes with higher Daily Supply charges & Buy In Tariffs (BiT) so unless you can generate enormous amounts of electricity then your stuck.

Coupled with this, a couple of providers here have actually applied to start charging people for exporting electricity - there has been discussions about this for the last year or 2.

I already put a 12kW battery in but will be installing a second battery taking me to 24kW given the ridiculous FiT vs BiT ratio of 0.05c / 0.40c if I do the sums correctly that's a 700% markup on electricity that we supply to the grid at relatively no expense to the Retailers.

This is a scam of the highest proportion that was perpetuated by Governments and needs to be looked at, it is fine if you use all of the electricity generated by using Washing Machines etc during the day while the sun is shining and does save money if you can use it all.

 

[discomatt]

The scam has, for home solar has been on the cards for years, the latest battery banks Vic government is putting in and sprouting how good they are is nothing short of laughable when you look at the cost, verse life span and recycling availability at end of life.
The modern world…

 

[Toyasaurus]

I think anyone putting on solar now should go for broke and put batteries in as well.

Why sell your power back to the provider for a fraction of what it is worth, or be charged for the privilege.

 

[boobook]

I get 10.4c a kW credit back from my supplier. I think that's pretty good.

I got back / paid less than I would have paid without solar of $3100 a year and save $5600 a year compared to before with gas heating.

Thanks to a few people here I looked into it properly. It made a massive difference for me.

And my carbon footprint is a whopping 40 Tons of Co2 less than before.

With a massive 18KW reverse cycle heater and aircon, my average bill ( over the year) is $10 a month.I honestly can't see any downside.

 

[boobook]

I think anyone putting on solar now should go for broke and put batteries in as well.

Why sell your power back to the provider for a fraction of what it is worth, or be charged for the privilege.

I try and try to calculate how it is economically viable but the payback is 20 years on equipment that will last 10 - 14 years.

I'd love them for outages but they simply do not add up. Even many places that sell them will admit that when asked.

 

[joshinthecity]

I think anyone putting on solar now should go for broke and put batteries in as well.

Why sell your power back to the provider for a fraction of what it is worth, or be charged for the privilege.

Yeah. I think this is the state of play.
I built a family home recently, with the intention of going big solar. But 12 mths later, I still have not done anything. As battery prices fall, I'll look at it again (maybe in another year) I've got no faith in using feed-ins as a metric to help make a decision. I fully admit to being a total noob in all this BTW.

 

[boobook]

the ridiculous FiT vs BiT ratio of 0.05c / 0.40c

Wow, where do you live.

mine is 10.6 / 22.5

 

[Toyasaurus]

BB, Looking at it that way I agree with you about the ROI, though I don`t think it`s that bad anymore.
I think my payback time is now under 10yrs for my system.
I`m still on 22c/kwh for however much I export.

Josh, waiting for batteries to come down in price is a waste of time now.
The prices of lithium keep going up, unless you want to take a gamble on Chinese one`s like I listed above.
They could be the cat`s meow or and expensive mistake.

If your waiting for the likes of Tesla coming down your SOL, they only increase.

 

[Toyasaurus]

I had another look at the power wall I put in a link too above.
$8185 free shipping, + gst, still just over half the price of a Tesla, but for more power.

I rarely use more than 30% of the storage that I have, 27kwh.
So I could probably get away with just having one of these.

DCS in Melbourne has 15kwh batteries for $11k.

Maybe worth another look?