I have 18 x 250 watt solar panels facing equally East and West on my house roof. Supposed to generate 4.5kW. Inverter is rated to 4kW. My retailer’s feed in tariff rates have just reduced this month from 9.5 cents to 0.07 cents per kWh. This was after a reduction from 0.10 cents in September 2020.
I’ve just been quoted $13,400 for the following system, which includes installation, from Skylight Energy of Rockdale.
Install 16 x 400 watt Hyundai PERC Shingle panels, 6 facing North, 3 West, 3 East & 4 flat on Western side carport which get Sun most of day and an LG Chem battery (not yet sure if RESU 6.5 or RESU 10). This brings the entire system up to 6.3KW. Inverter hopefully will be a 5KW Goodwe, as original quote was for a 5KW Huawei, but I’ve read a few bad reviews about these, although generally replaced under Warranty, and they’re Chinese, enough said in this current climate.
I was promised a reduction in my bills to almost nothing with the battery installed, but realistically, I’m hoping to reduce my quarterly bills to an average of $300 from $750.
Adding up my current quarterly bills from April 2020 to April 2021, the details are: General Usage: 11,198 kWh. Off Peak: 2,106 kWh. Feed-in: 2,189 kWh. Annual payment was $3,036.00 after a 25% discount off the total charge and the credit of $207.19 in feed in tariff.
As you can see by this, the electricity provider appears to be ripping me off with solar feed-in rates, so I need to consider a battery, with sufficient panels installed to re-charge it. I am based in Western Sydney with most of my roof facing East-West and some sections (with multiple valleys) facing North.
I get full Sun in Summer, about 6 hours Sun half-way through Spring and Autumn and about 5 hours sun in Winter. This is due to a neighbours large gum tree in my North-West corner blocking the sun during Winter for around 3 hours.
- Does this system size seem feasible in delivering the savings claimed?
- Is the price reasonable for this system?
- There are many mixed reviews about Skylight energy, mainly to do with after-sales service. Any issues known about this company?