Solar Quote Review Sydney - Jinko vs Risen vs Canadian vs Trina Solar

Below quotes are for 6.6 kW solar panel system and 6 kW 3 phase inverter (Would you suggest 5 kW would be a better option?) Which offer shall I go for? I thank you all for your kind suggestion in advance.

OFFER: 1 (Premium package Monocrystalline panels with 3-phase Inverter)
Jinko 310W Monocrystalline + Perc
Growatt 6kw Inverter
21 panels ( 21 x 310 W= 6.5 kW)
Fully Installed price $4,250.00

OFFER: 2 (Standard package Monocrystalline panels with 3-phase Inverter)
RISEN 315W Monocrystalline + Perc
Growatt 6kw Inverter
21 panels ( 21 x 315 W= 6.6 kW)
Fully Installed price $3,600.00

OFFER: 3 (Gold package Polycrystalline panels with 3-phase Inverter)
Canadian 285W Polycrystalline
Growatt 6kw Inverter
23 panels ( 23 x 285 W= 6.55 kW)
Fully Installed price $3,150.00
For Fronius European Inverter it would be $1000 extra on the above quote.

OFFER: 4

  • Supply and install 6.6KW Solar system ( 20 X 330W TRINA SPLITMAX PANELS)
  • Supply and install 6KW Growatt 3 Phase inverter ( comes with WI FI)
  • Fully installed

Price = $3,300.

Hi Royritayan,

These are all budget level systems with a very cheap Growatt inverter. I would recommend requesting a quote with a higher spec inverter such as SMA or Fronius. It’s always worth investing a little more for higher quality components when it comes to solar.

The Jinko panels are my pick of the bunch, Risen are also ok, but I wouldn’t go with the poly panels from Canadian.

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What area are you in @royritayan?

Denham Court, Marty! Thanks!

Finally deciding to go with the following 7.5 kW solar system than 6.6 kW from Solar Power Nation:

23 x Risen Energy Co Ltd Risen 330W

Mono Perc Half Cut Panels Solar Panel 1 x (ABB) Power-One Italy S.p.A ABB 7.5TL - OUTD - 3 Phase Inverter

Installation price: $4050

Would you think this is a good deal and decent reputed products and retailer (Solar Power Nation)?

Thank you!

Hi @royritayan

It’s a pretty cheap system. Have you had a good look through the reviews of this company? I did a quick Google search and found a number of recent ones that were less than glowing let’s say.


Check out our Solar Power Sydney page

Hi Marty,
Finally, I have got the PV system installed by Solar Power Nation for $3950.
24 x 330 W Risen Panel : 7.9 kW along with ABB Trio 8.5 kW inverter.
Currently, I am getting around 23-24 kWh energy per day at Denham Court, NSW. The panels are facing north-west side. I have thought the energy generation would be around 35 kWh per day at the end of November for a 7.9 kW system, or is 23-24 kWh reasonable?
Could the 8.5 kW ABB inverter not good for 7.9 kW panels?

Looking forward for your help.
Thanks!

Hi @royritayan,

24kWh does seem a little on the low side. How many days is that averaged for though? We have had a lot of haze because of these bush fires. I would expect around 30kWh a day or more on average in November with a NW install at around 25 degree roof pitch. I wouldn’t be too alarmed yet, because these are averages that we are talking about and bad weather can bring the average down over a particular period. However I would keep a close eye on it over the next couple months.

How much power do you use daily btw?

Cheers
Marty

Hello @Marty,
Thanks for your reply. It has been around a week, but I am worried for two reasons:

  1. 7.9 kW panels with 8.5 kW inverter might be not a good match
  2. The string 1 produces much less voltage (167 V) than string 2 (369 V) which is unusual as all the panels are on the same roof. Unequal string voltage affects energy production very badly, as far as I understand.

I attach a picture for pitch- if you find anything not right! The roof is facing the north-west side. 74908188_10157476031597110_4059614319518679040_n|666x500

Our daily energy consumption is around 15 kWh, but when we turn on the ducted heating/cooling it shoots up to 27-30kWh.

Thanks!

Hi @royritayan

Nothing wrong with the ABB inverter. The problem is the string 1 voltage is way too low and well out of the required MPPT range of the inverter. String 1 will not be doing anything hence why your generation is so low. The total solar generation should be well over 35kWh per day.

This is due to extremely poor design and configuration of the strings. Typically of sales companies who have no adequate training. This needs to be re-wired to work properly. How many panels are the other roof faces?

Refer to the MPPT voltage range in the bottom right hand corner of the ABB spec sheet. As you can see the string voltage (when operating) needs to be above 320V to work correctly.

@Sparky
All the panels on the same roof. In total 24 (330W) panels and for one string I believe should be 12 panels connected as this inverter has 2 strings input.

Thanks for your comment, I was suspecting something wrong with the string voltages, but you are bang on. The installers, I don’t know how do they get CEC certificates- just paying money and attending one seminar?

Thanks again!