Solar Panels

Single phase. I had considered whether it would be worth changing to 3-phase, but it's a big cost, including some re-wiring and I wasn't sure I'd see a payback on capital. The idea of having far more solar capacity did intrigue me. I think I could have got to 30kW on my roof? But as it stands I just stuck with the maximum I could get which is 15kW connected to an inverter that can see the whole 15kW but only outputs at 10kW... though sometimes I see little overpower blips around 13kW for short periods of time.

The battery is a GoodWe Lynx F G2. I actually run two stacks of 12.8kWh each. They're pretty cool because you can start small and over time add new modules as you need it. There was a battery incentive program in QLD that helped, but only very marginally. It was mainly just an investment in technology, and it does help me when I get home to recharge my EV overnight completely, ready for the next day's journey, and not have to touch grid power - except for occasional blips every day (such as 0.43kWh today so far costing me $0.11).
That's interesting. We have an 8kW set up - originally through some ACT Govt subsidies for solar installation, which works well for MrsK and I, as she is retired and I work from home more days than not, so our peak use is during the day. I have been checking out battery options, but they don't stack up financially now. I plan to retire at the end of 2025 and replace my car with an EV, so the battery set up you have would make sense.
 
My issue with solar is that since installing the panels, pigeons have found a warm dry place to nest.
I had similar. Had to get up on the roof and install some PVC mesh under the edges of the panels and some "bird-deterrent" spikes in areas where the mesh would not work. The position of the panels on the upper-story roof and directly above the ground level patio roof made it a challenge to install the mesh along that edge. I am sure the neighbours were recording my antics hoping to make a fortune from a viral video if my scaffolding did not work as planned. Thankfully, neighbours did not profit from my efforts :).

And at Easter this year I demolished that patio and hired a boom lift to paint the gutters/facia/eaves on that top level below the panels, and while up on the boom lift I was able to check and adjust the mesh as necessary.

Since those additions, pigeon roosting problem was solved.
 
so I've received 1 formal quote so far for my commerical property.
~7m warehouse ceiling

1. 18kW worth of (530-555W ea) Canada Solar panels
2a. Sungrow 15kW inverter SG15RT
2b. optional sungrow hybrid inverter, incase i want to add a battery next FY

Sungrow is coming out with a compact wall mount EV charger, later this year they said
so everything will be sungrow and everything can stay DC to keep electrical efficiency up (rather than converting DC to AC and back to DC etc)

2a. $17.3k ex GST
2b. $20.5k ex GST

waiting for 2 more quotes

thoughts on above please?
 
I thought batteries would be economical by now but still not yet.
We are now landlords as we sold the business last year.
That business now has pretty low electricity expense as they work sunlight hours mostly.
 
As long as the gensets you have are "clean" power you are probably ok.
Clean power 3N Diesel gensets are in the order of $1K per kVA. Potentially we could use a 10kVA.

We would use the Gennies about once a year. Average would be 1-2 days each time.
But this time AUsgrid says power restoration will be Sunday 19Jan☹️
 
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So glad we opted to cover the roof with solar panels. Just leave the a/c running flat chat and still feeding the grid for credits (at a terrible c/kwh rate)
Not in QLD so not dealing with those temps today, but very much in the same boat re: covering the roof with panels and loving my first summer of being able to use the a/c all day without fear of needing to take out a another mortgage!
 
Not in QLD so not dealing with those temps today, but very much in the same boat re: covering the roof with panels and loving my first summer of being able to use the a/c all day without fear of needing to take out a another mortgage!

I haven't been able to justify the cost of a battery as yet. (Maybe that would change if we get an EV for the next car).

When we first installed we deliberately targeted our household usage for peak producing hours - hot water, a/c, washing, drying, dishwasher etc and got a credit every quarter

More recently if it suits us we just leave the a/c 24/7 and don't hold back using the oven, dryer etc during network peak (most expensive) 4pm to 10pm period.

Despite becoming rather blasé with usage in recent times our quarterly bill was still sub $50. (As in the QLD $1000 subsidy credit went down to circa $950)

Maybe if one or both levels of gov come up with a decent subsidy we will put in a battery which besides eliminating all power costs will insulate us from potential power outages. We are in suburbia with very infrequent (as in nil in 18mths so far) outages so not a priority ATM,.
 
Clean power 3N Diesel gensets are in the order of $1K per kVA.

You don't need a diesel, they don't cope with only occasional use.
A petrol cheapie from a reputable source is all you need, the cost of the fuel doesn't matter.
If you wire in a 32 amp socket into the Sb they can choose the circuits to load @240v as the inward circuits are isolated.


This is what I bought cheap and cheerful but good build quality and walks the walk in output.
I rewired one of the 15amp outlets with a 32 amp plug ( I had the sparkie inspect it )
 
I haven't been able to justify the cost of a battery as yet. (Maybe that would change if we get an EV for the next car).
I didn't get a battery either. Have only had a smart meter since early October (shortly after the solar install) so I have no accurate idea of my historical consumption habits by hour/day/etc so my thinking was that it made more sense to use the new solar install for a year and get some hard data to model my utilisation and better understand what battery solution - if any - would make the most sense. No point spending that money and getting something that is either too big for your needs, not big enough, or simply unjustifiable on the whole when you run the numbers. Having said that, when I look at the sheer volume of energy I'm exporting to the grid since my install was completed (i.e. some 4.8MWh since late September), I suspect a battery will make a huge amount of sense!

When we first installed we deliberately targeted our household usage for peak producing hours - hot water, a/c, washing, drying, dishwasher etc and got a credit every quarter
Yeah, that's been a learning curve for me. Seeing the utilisation in real time via the solar panels app has been quite the eye opener, but it's also allowed me to become smarter with my usage habits. Have a gas cooktop and hot water system, so at present, can't do much to minimise those costs.

Despite becoming rather blasé with usage in recent times our quarterly bill was still sub $50. (As in the QLD $1000 subsidy credit went down to circa $950)
Current billing quarter will be my first full one with solar. I'm expecting a bill, but significantly lower than the same time last year despite having made considerably more liberal use of the a/c. I'm also aware that I can likely get a more cost effective deal on in terms of energy supply, so I'll be continuing to explore that as well. For now though, it's a case of enjoying the savings (versus my historical billing) and continuing to optimise how I use the energy I'm producing.
 
Yeah, that's been a learning curve for me. Seeing the utilisation in real time via the solar panels app has been quite the eye opener, but it's also allowed me to become smarter with my usage habits. Have a gas cooktop and hot water system, so at present, can't do much to minimise those costs.

For the first 3 months and up until the first quarterly bill I checked the system output was sufficient every morning before we used a major appliance and read the daily reports as to generation and upload to the grid. New toy syndrome

15 months downstream I haven't looked at the system stats for at least 6 months 🤣
 
For the first 3 months and up until the first quarterly bill I checked the system output was sufficient every morning before we used a major appliance and read the daily reports as to generation and upload to the grid. New toy syndrome

15 months downstream I haven't looked at the system stats for at least 6 months 🤣
Admittedly I'm not glued to the reports and real-time stats like I was in the immediate aftermath of the installation. These days, it's more a case of checking out how much we're making on particularly overcast days to get a better idea of what my "bad" days are going to look like (i.e. thinking ahead to winter), or checking out just how much we can generate on a "perfect" day and seeing whether we've hit a new daily generation record? Into the future, I think it's going to be more a matter of ensuring that the system is performing as expected so I can proactively identify any issues.
 
I keep complaining to Mr Denali that the solar panel ads make out that you will be raking in money so I'm disappointed by how little we get for feeding back to the grid.

Mr Denali keeps telling me we won't pay a bill for the rest of our lives here not considering he's 63, I prefer more money 😂

We have changed our power habits. Laundry, dryer, dishwasher run during the day only, preferably on sunny days.
 
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I keep complaining to Mr Denali that the solar panel ads make out that you will be raking in money so I'm disappointed by how little we get for feeding back to the grid.

Mr Denali keeps telling me we won't pay a lower bill for the rest of our lives here not considering he's 63, I prefer more money 😂

We have changed our power habits. Laundry, dryer, dishwasher run during the day only, preferably on sunny days.
In my old house FIT was 69c and now it's 4c - I export much more than I use but still get hefty bills especially in summer when the aircon needs to be on in the afternoon and night if it's hot
 
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Lost power and phone ( landline and mobile) yesterday evening. Ausgrid showing power should be back by Sunday 5pm! Fortunately it has just come back on now. Still no phone though, Telstra not saying when it will be restored.

Im told our system is set up that if we lose power, the bottom section is powered from the batteries so at least the fridge/freezer should keep going but not sure about multiple days
 
Im told our system is set up that if we lose power, the bottom section is powered from the batteries so at least the fridge/freezer should keep going but not sure about multiple days
Largely dependent on the battery capacity and how much power the fridge/freezer/etc draws, but battery setups are typically not designed to keep you running for days at a time. Of course, they will make all the difference in terms of mitigating the risk during outages - short or lengthy - in that they buy you time to make alternative arrangements and not lose the entire contents of said fridge/freezer.
 
I keep complaining to Mr Denali that the solar panel ads make out that you will be raking in money so I'm disappointed by how little we get for feeding back to the grid.

Mr Denali keeps telling me we won't pay a lower bill for the rest of our lives here not considering he's 63, I prefer more money 😂

We have changed our power habits. Laundry, dryer, dishwasher run during the day only, preferably on sunny days.
We pump out five times what we use. We still get a bill. Of course much less than previous. Actually almost 10 times.

IMG_2423.jpeg
 
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I haven't been able to justify the cost of a battery as yet.
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.
raking in money
Yeah the Tesla powerwall 3 installer - Penrith Solar, kept saying to me "once the battery is installed, all the power it supplies is free". 🤣.

It got up to 40.6 in the end but still only 11 % humidity.
22c atm. At that temp irrelevant what the humidity is. Come down here, it's cooler.

Won't someone peel me a grape?
I swop you - refill my gennie please.
 
I haven't been able to justify the cost of a battery as yet. (Maybe that would change if we get an EV for the next car).

When we first installed we deliberately targeted our household usage for peak producing hours - hot water, a/c, washing, drying, dishwasher etc and got a credit every quarter

More recently if it suits us we just leave the a/c 24/7 and don't hold back using the oven, dryer etc during network peak (most expensive) 4pm to 10pm period.

Despite becoming rather blasé with usage in recent times our quarterly bill was still sub $50. (As in the QLD $1000 subsidy credit went down to circa $950)

Maybe if one or both levels of gov come up with a decent subsidy we will put in a battery which besides eliminating all power costs will insulate us from potential power outages. We are in suburbia with very infrequent (as in nil in 18mths so far) outages so not a priority ATM,.

I didn't get a battery either. Have only had a smart meter since early October (shortly after the solar install) so I have no accurate idea of my historical consumption habits by hour/day/etc so my thinking was that it made more sense to use the new solar install for a year and get some hard data to model my utilisation and better understand what battery solution - if any - would make the most sense. No point spending that money and getting something that is either too big for your needs, not big enough, or simply unjustifiable on the whole when you run the numbers. Having said that, when I look at the sheer volume of energy I'm exporting to the grid since my install was completed (i.e. some 4.8MWh since late September), I suspect a battery will make a huge amount of sense!


Yeah, that's been a learning curve for me. Seeing the utilisation in real time via the solar panels app has been quite the eye opener, but it's also allowed me to become smarter with my usage habits. Have a gas cooktop and hot water system, so at present, can't do much to minimise those costs.


Current billing quarter will be my first full one with solar. I'm expecting a bill, but significantly lower than the same time last year despite having made considerably more liberal use of the a/c. I'm also aware that I can likely get a more cost effective deal on in terms of energy supply, so I'll be continuing to explore that as well. For now though, it's a case of enjoying the savings (versus my historical billing) and continuing to optimise how I use the energy I'm producing.
When we installed our solar panels in mid 2022 I looked at a battery, but the numbers didn't stack up either. We have 8kW of panels, and our aim was to get cheap electricity, as living in Canberra, heating is more of an issue than air conditioning. We have ceiling fans to get us through the 'hot' days, and put them in reverse for winter, to move the air around from the electric panel heaters on the walls. We run all the major appliances during the day. The one device which makes the power spike the most is the electric kettle when I put it on in the morning, before the panels kick in.

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.

I have been keeping an eye on the Vehicle-to-Grid (V2G) wall charger units and the elec vehicles that can use those. That's a lot cheaper than buying a wall battery, and a lot bigger. I'm looking to retire my old car in 18 months or so, and planning to get an EV, with a V2G setup, then that will drop our bills even further.
 

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