Domestic solar PV quotes 2018

garo

Mickeroo it is random. Some people get the honour. Usually they inspect installations from newer companies more than well-established ones that have a track record of installation approvals.

Chewbaca79

garo wrote: »

Too expensive. Any reason why they are going for 400W panels? Also your annual savings are a bit too high. They are assuming almost 10k units coming from solar every year. That's crazy even with your high output. You have consumed 9k units total on average for the last 7 years. And more than half of them have been on the night rate. With that sort of a system I seriously doubt you would save even 800 p.a. Given the inflated savings number, I don't think this company/salesman is being honest with you.

I had also discussed with them 20 x 310w panels (smaller dimensions than the 400w) to give me 6.2kw - the 400w panels were in the final quote as I had asked them to maximise the system size as I'll have the EV at home during the day so can charge that using the zappi.

So should I reduce the system size? And what are your thoughts on the battery?

For ref again below is my unit usage:

Over 7 years & 1 month my usage has been as follows:
37,411 units night rate (60% of total)
25,314 units day rate (averaging 297 units per month) (40% of total)

reklamos

Chewbaca79 wrote: »

Roof(s) orientations is south, and likely set up will be two strings of panels 8 + 8 on two south facing roofs in West Cork without shading

I would expect inverter then at least to match the panels. There is a big gap between 6.4kw and 5kw.
With south facing roof I already reaching 4.6kw with my 4.5kw setup and it is only February.

garo

Get prices for both 20*310 and 16*400. Will your EV be at home during the day to soak up production? You'll probably get 20kW excess per day if not more with a 6kW system from May onward.

And yeah you need a bigger inverter otherwise you will have a lot of curtailed power going to waste.

Chewbaca79

garo wrote: »

Get prices for both 20*310 and 16*400. Will your EV be at home during the day to soak up production? You'll probably get 20kW excess per day if not more with a 6kW system from May onward.

And yeah you need a bigger inverter otherwise you will have a lot of curtailed power going to waste.

OK - thanks Garo will do - yeah, the EV (75kw) battery will be parked at home during the day so will be able to take advantage of the excess - will ask about a larger inverter as well.

What do you think about the battery? - they have included 5.8kw in the quote even though I didnt ask for it and said there is minimal saving €500 by removing it due to a discounted price for getting the solax battery & inverter together.

What do you think?

garo

I find it really hard to believe that there is a minimal 500 euro difference. You would get an additional 1200 in grant but 5.8kWh of battery would cost at least 2000E at trade prices and 500E extra for the hybrid inverter. They are trying to hard sell a battery which you may or may not need. I'd say move on and look at other suppliers. The system is far too expensive and they are not being honest about payback.

championc

If the car will be parked at home so much, how much power to you expect the car to use ?

An EV will possibly average 6km per kw, so how much power do you need per day / per week ?

dan.lambert

Hi wexfordman2
Our smart Home devices are added and controlled through a seperate app at the minute "SAVEnergy" This is also available on the APP store. The integration with the GivEnergy Cloud will be later on in the year.

jimbobmalones

Shefwedfan wrote: »

Check on amazon and some UK sites, they have little kits available for caravans that would be best option.

solartricity.ie sell 300w panels but they are 1.6m by 1m so not sure if that would suit your roof


J

Shefwedfan

jimbobmalones wrote: »

solartricity.ie sell 300w panels but they are 1.6m by 1m so not sure if that would suit your roof


J

Based on the post standard panels would be too big

Charlie-Bravo

I have an awkward front roof which is best angled for SW. I could put some on the NE which is a better shape but would not get as much direct sunlight.

What sizes are the common panels? Hoping to see if I can max the SW side with the best number/output.

garo

1.6-1.8 by 1m is a pretty common dimension for 300-325W panels. Look at the datasheets linked here:

Gazzler82

Ok final scores on the doors - got quotes from 5 different installers. Looked for 10 panels - no battery, no hot water diverter. Scaled them for cost per watt and then adjusted further for "quality" by dividing by yield at 25 years!


Supplier Cost incl grant Installed capacity Cost per w D Factor (Qual) Overall D/E
D 3400 3000 1.13 0.8 1.42
E 4700 3200 1.46 0.85 1.73
B 7600 4000 1.9 0.87 2.18
B 6700 (7 pan) 3200 2.09 0.87 2.41
A 5900 3000 1.97 0.8 2.46
C 4185 (6pan) 1980 2.14 0.85 2.49
C 5039 (7 pan) 2340 2.15 0.85 2.53
A 4565 (7 pan) 2100 2.17 0.8 2.72

thanks for all the suggestions for those who PM'd me

Shefwedfan

Has anyone actually sold the battery second hand>? just wondering if market for them

garo

What a gorgeous day today. I got 19kWh from my 4.8 EW system. Exported 7 too. Full battery but no diverter.

Nedved85

Shefwedfan wrote: »

Has anyone actually sold the battery second hand>? just wondering if market for them

I'm sure you could post here?

What size? Upgrading?

Shefwedfan

Nedved85 wrote: »

I'm sure you could post here?

What size? Upgrading?

2.6kWh, installed in Jan


Yes thinking of going another direction.

Nedved85

Cool, if I actually get solar I’ll give you a shout. Few others might interested here too

championc

garo wrote: »

What a gorgeous day today. I got 19kWh from my 4.8 EW system. Exported 7 too. Full battery but no diverter.

Yep. A record today for me too. 11.86 from my 2.7 S. Thankfully, only 0.21 exported.

I bought a Zappi last week and then decided to buy an Eddi too. Since my new EV has over 80% charge already, the Eddi got the surplus today after my batteries.

Shefwedfan

championc wrote: »

Yep. A record today for me too. 11.86 from my 2.7 S. Thankfully, only 0.21 exported.

I bought a Zappi last week and then decided to buy an Eddi too. Since my new EV has over 80% charge already, the Eddi got the surplus today after my batteries.

Was trying to burn electricty today:P


Filled up the car and then nothing left, even took out the bouncy castle and fired that up day

wexfordman2

garo wrote: »

What a gorgeous day today. I got 19kWh from my 4.8 EW system. Exported 7 too. Full battery but no diverter.

That's very good
I got 21 from my 5.84kwh system, south facing. Exported 4 and using an eddi

Shefwedfan

wexfordman2 wrote: »

That's very good
I got 21 from my 5.84kwh system, south facing. Exported 4 and using an eddi

24.7 today from, no idea the exact, 19 panels anyway :-) 5.xx anyway

Facing 240 degree SW

Nedved85

Serious numbers, keep us updated on those guys (for those who haven't made the jump yet)

Shefwedfan

Nedved85 wrote: »

Serious numbers, keep us updated on those guys (for those who haven't made the jump yet)

Today was the first day really it was going majority of day, was still generating 2kW at nearly 6 so could do all cooking etc before the sun went down

It was a pity I had fully charged the car two days ago, it filled it up fairly quickly this morning as only had down a few short trips

imported 5kW(morning time) and exported over 5kW.....now running on battery and that should keep us going till reduced rate kicks in

Now I do need a rainy day soon as planted 100 trees today :-)

joujoujou

Sunday stats:

10.34 kWh generated and used

7.96 kWh generated and wasted (sent to grid)

5.18 kWh bought.

So actually had to pay for my own energy. :mad:

garo

wexfordman2 wrote: »

That's very good
I got 21 from my 5.84kwh system, south facing. Exported 4 and using an eddi

Yeah I suppose the EW is a disadvantage for sox months of the year but slightly advantageous for the other six months as you generate more for longer. For the same tilt I think a S facing system still generates a little bit more but not by a lot.

AidenL

27.5kwh produced yesterday here, managed to consume 33.2kwh though, purchased 7.2 overnight - lot of cooking, baking, ironing. 20 panels, 6.3 kw and 7.2kw of batteries. Exported 0.9kwh, that was a good result I think.

jspuds

I was getting shading on my panels so got the installer back to fit Tigo optimizers & wow what a difference.
Produced 33.5 kwr from my south facing 6KW system yesterday

championc

jspuds wrote: »

I was getting shading on my panels so got the installer back to fit Tigo optimizers & wow what a difference.
Produced 33.5 kwr from my south facing 6KW system yesterday

Were you prone to shading for much of the day ? And was the shading on just a few panels ?

I actually bought 12 in January when a guy was selling them on eBay @ 30 each, so I hopped on them. I'm waiting for a calm day and I also need to borrow the ladder from a neighbor.

jspuds

championc wrote: »

Were you prone to shading for much of the day ? And was the shading on just a few panels ?

I actually bought 12 in January when a guy was selling them on eBay @ 30 each, so I hopped on them. I'm waiting for a calm day and I also need to borrow the ladder from a neighbor.

Yeah my chimney was impacting different panels at different times of the day. It was much worse in the middle of winter.

I went the whole hog and got the Tigo Cloud Connect Advanced as well which is great as it shows the output of each panel and how much is reclaimed. Just checked and one of my panels is outputting less than a 1/3 of the others and not impacting the rest of the system.