How much electricity does a solar panel generate per day? What’s a tier 1 panel?

Having the world’s highest average solar radiation per square meter, Australia is considered the most potential and viable solar energy source whether you’re a home or a commercial entity looking to install panels on your premises.

Choosing the right solar system can be very confusing as there’s a lot of misleading jargon and buzzwords – especially with the solar panels! You’ll also have to ensure they are compatible with your entire solar system – you’ve then got to see how they interact with each other before trying to calculate their output, which can be challenging as well.

It is impossible to tell you with certainty that your solar panel produces this much power – as this varies from brand to brand and panel to panel. There’s also something else you need to consider in addition to choosing a panel – the quality of manufacturer, generally ranked via solar panel tiers.

How much electricity does a solar panel generate per day? Photo by Ryan Searle on Unsplash

How are solar panels tiered?

Solar panels are categorized into three tiers, with tier 1 as the best. This can affect output depending on the brand and number of watts per panel (especially over longer periods of time). Your location will also be important – obviously someone in Australia is going to get better value out of a solar installation than someone in Glasgow (only 50 days of sunshine a year there…).

Let’s discuss the concept of a Tier 1 solar panel. This is a bit of a misnomer – in the sense that Tier 1 or Bank-ability solar panels come from companies which have been in the industry for many years and are financially capable of dealing with your warranty issues, repairing issues or any problems you encounter over the ~10 years you will use their product. That’s my convoluted way of saying Tier 1 denotes the ranking of the manufacturer itself, not the solar panel. It is the manufacturer who will back up your product in the case of potential future defective panels or installations. Banks or investors may not want to put their money in your solar power project (commercial solar or residential) unless they’re satisfied your manufacturers are likely to be around if and when your solar systems malfunction. How many successful projects has the company undertaken? How long have they been around? The answers to these questions will impact which tier the manufacturer is.

It is important to keep in mind that Tier 2 or Tier 3 solar panels are not always a poor choice per se – these manufacturers can also offer high quality panels, it’s just riskier to rely on them because the company is recently established, and you may not be sure how long they’ll be in the industry. Maybe their manufacturing standards aren’t as robust as some of the bigger brands – as always, you get what you pay for. It’s a matter of weighing up the pros and cons and ensuring your solar investment is making money within your risk tolerance. And if you’re going for a bigger installation, it’s generally worth going for a quality manufacturer and a tier 1 panel. Preferably more than one, but you get the point.

Who chooses solar panel tiers?

This tier-based ranking (remember, it’s per manufacturer, not per panel) is decided by Bloomberg New Energy Finance – a research organization. There are other ‘tier’ lists out there which are better off avoided as it can be very confusing – the Bloomberg list has been well trusted for a long time.

If you’re interested in more detail in how a company’s tier is decided, the official BloombergNEF site has a useful PDF you can download here.

Just remember, there’s a lot of marketing involved in solar, so be sure to ask as many questions as you can to the salesperson. Grab a copy of the spec sheet for the panels they’re showing you and check it out yourself. Do your due diligence and you can even end up with a cashflow positive solar installation.

How much electricity does a solar panel generate per day?

Your location and the amount of watts in the solar panel will also impact the amount of power your panels are able to generate. solar panels will be in terms of making the most of the solar power.

Your inverter also plays an important role in regulating and maximising generation of solar power. A top-notch quality solar inverter determines how well your solar output is distributed, applicable once the DC power turns into AC.

In Australia you can generally bank on 10-12 hours of sunlight during summer. For simplicity’s sake, let’s call average sunlight 10 hours for our calculation, and the capacity of the solar panel we’re measuring is 300 watts:

Total Watts = Average time of sunlight x Solar Panels watts x Number of Panels

= 10 x 300 x 1

= 3000 Watts Hour or 30KWH Daily

But we also need to consider solar panel efficiency. A solar panel has a maximum of 15–22% efficiency, due to the Shockley-Queisser limit silicon panels will never reach greater than 1/3 efficiency.

Let’s calculate total watts from a single panel, daily, with 20% efficiency:

3000 Watts x 20% = 600 Watt Hours or 0.66KWH per day.

If you want to measure solar output you have numerous options depending on which inverter you’ve chosen. Most of them offer a web-based interface so you can keep an eye on how much money you’re saving – you could even pipe the solar statistics to a Raspberry Pi, or automate reports showing how much you’ve saved. Solar power in Australia has never been cheaper – we’re seeing a meteoric rise in commercial solar installations nationwide, whether you’re Ikea or an SME – it’s time to go green and choose solar power for your business.

Which manufacturers offer tier 1 solar panels in 2021?

As per review.solar for Q1 2021:

  • LONGi
  • Jinko
  • JA Solar
  • Trina Solar
  • Canadian Solar
  • Risen
  • QCells
  • Suntech
  • Talesun
  • First Solar
  • ZNShine
  • Seraphim
  • Eging
  • Haitai New Energy
  • Astronergy
  • Jolywood
  • SunPower/ Maxeon
  • Jinergy
  • VSUN Solar
  • Jetion
  • LG Electronics
  • BYD
  • AE Solar
  • Phono Solar
  • Waaree
  • HT-SAAE
  • REC Group
  • URE
  • ET Solar
  • Renesola
  • Adani
  • Boviet
  • Vikram
  • Ulica
  • Leapton
  • Hansol
  • Kyocera
  • S-Energy
  • Recom
  • Shinsung
  • Heliene
  • Sharp
  • Swelect
  • Photowatt

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Hyundai Solar Panels coming to Australia

Hyundai solar panels will be available in Australia this year after inking a massive deal with a local solar company. The Korean company will look to sell to the commercial and residential sector and will also look to install large-scale solar projects here.

Hyundai Solar Panels in Australia

Hyundai Solar Panels - Green Energy
Hyundai Solar Panels – Green Energy (source: Hyundai)

Hyundai Heavy Industries Green Energy have signed an exclusive deal with Queensland solar distribution company Supply Partners. The deal has been valued at $70 million and will see Hyundai HI return to the Australian market since it exited in 2011. 

Larry Kim, the head of global sales for Hyundai Heavy Industries Green Energy, said the company’s sales targets are ambitious – planning to sell 20-30MW of panels this year, and 40-50MW in 2019. According to RenewEconomy, they were only up to 10MW of panels when they exited the market. It’s important to note that the solar landscape has changed considerably in the last 7 years and that 10MW worth of panels certainly doesn’t represent the ostensible failure the numbers provide in 2018 terms.

Kim said the focus of Hyundai will be squarely on the residential and commercial markets. 

“Nowadays, the Australian market is growing very fast in all markets, but residential and commercial are more stable,” Kim told RE in an interview.

He also discussed their plans with regards to energy storage and how they’re going to roll it out to Australia – given that we already have such a high solar panel installation rate it would seem logical to enter this market as well. 

“This is part of (our) long-term strategy,” he said.

“We are focusing on the Korean market for energy storage systems first,” he said. “After that, (we will look at) the Australia residential market.

“But not in the near future.”

We’ll be super interested to see how Hyundai’s re-entry into the Australian market goes and will be sure to update you as soon as we hear anything more about the move.

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SunPower X-Series Solar Panel Australia

Sunpower have released the X21 model of their X-Series solar panel and it’s now available Australia wide. These durable, efficient and performance-engineered SunPower X-Series solar panels are great if you have a limited amount of space on your roof and want to achieve maximum light-to-energy conversion from your panels! They’re far from the cheapest panel on the market, but if you’re looking at investing in something for the next 25 years in our experience choosing the lowest price when deciding on your solar investment is generally a false economy.

SunPower X-Series Solar Panels

According to the Sunpower site, their X-Series residential panels convert more sunlight to electricity by producing 38% more power per panel and 70% more energy per square meter over
25 years. This is in comparison to  a representative conventional panel: 250 watts, approx. 1.6 m², 15.3% efficiency. They’re available in the SPR-X21-345 which has a Nominal Power (Pnom) of 345 watts, and the SPR-X21-335, which has a Pnom of 335 watts.

Both panels utilise SunPower’s  ‘Maxeon technology’ – which is to say it’s the only solar cell on the market built on a solid copper foundation, making it ‘virtually impervious’ to the corrosion and cracking that inevitably degrade conventional solar panels. This allows SunPower to guarantee 95% efficiency for the first five years, with ~0.4% drops in efficiency per year for 20 years after that (making it a 25 year warranty).

The average panel efficiency of the SPR-X21-335 is 21.0% and the SPR-X21-345 boasts an impressive 21.5% light-to-energy ratio.

SunPower X-Series Solar Panel
SunPower X-Series Solar Panel (source: sunpower.com.au)

Buy SunPower X-Series Solar Panels in Australia

Flex is now the exclusive distributor of SunPower in Australia – but you can click here to schedule a free home assessment directly from the Sunpower website. They also offer financing with no money down so there is an option for everyone.

Do you want more information about the SunPower X-Series Residential Solar Panels? Click to view the Spec Sheet!

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