Longi Solar Panels in Australia: Range, Efficiency and Price

Quick answer: Longi is the world's largest solar panel manufacturer and a tier-1, value-to-mid-range brand widely used on Australian rooftops. Its residential range — led by the Hi-MO 6, Hi-MO X6 and Hi-MO 9 series — offers efficiencies of roughly 20% to 24% and performance warranties of up to 30 years, longer than the 25-year industry norm. The price of Longi solar panels depends on the model, your system size and the install, and small-scale technology certificates (STCs) reduce the upfront cost, so a quote is the reliable way to see your figure. Longi panels are CEC-approved and a dependable, cost-effective choice for most homes.

If you've been comparing solar panels, Longi comes up constantly — and for good reason. This guide explains the range, the technology, the warranties, and what actually drives the price, so you can decide whether Longi is right for your roof.

BESS Australia is an accredited, multi-brand supplier and installer that carries tier-1 solar panels including Longi, supplying Australia-wide and installing across Brisbane, the Sunshine Coast, the Gold Coast, Sydney and Melbourne.

Are Longi solar panels good?

Yes — Longi is a tier-1, bankable manufacturer and the world's largest solar panel maker by shipments, known for strong efficiency, long warranties and value-to-mid-range pricing. It's one of the most widely installed panel brands in Australia.

A tier-1 panel maker is one that major financial institutions consider bankable — a proxy for scale, financial stability and long-term reliability. Longi (LONGi Green Energy) specialises in monocrystalline silicon, holds multiple world records for solar cell efficiency, and appears on the tier-1 lists used across the industry. In plain terms: it's a large, financially solid manufacturer with a strong track record, which matters when you're relying on a 25- or 30-year warranty.

The Longi solar panel range in Australia

Longi's Australian residential range centres on the Hi-MO 6, Hi-MO X6 and Hi-MO 9 series, with the older Hi-MO 5m as a value option and higher-power Hi-MO 7 panels aimed at commercial and utility projects. Most homes are fitted with Hi-MO 6 or X6 panels.

Monocrystalline panels — Longi's speciality — use single-crystal silicon cells for good efficiency and reliable long-term output. Longi's newer panels use its own HPBC (Hybrid Passivated Back Contact) cell technology, and the latest HPBC 2.0, which lifts efficiency and improves shade and low-light performance. The table below summarises the main residential series.

Figures are approximate and vary by the exact model, so confirm the current spec and warranty for the panel you're quoted.

Longi efficiency and technology

Longi residential panels typically deliver around 20% to 24% efficiency, with the HPBC-based Hi-MO 6, X6 and Hi-MO 9 at the top of that range and strong performance in heat and low light. Higher efficiency means more power from the same roof area.

Efficiency is the share of sunlight a panel converts to electricity — useful when roof space is limited, because higher-efficiency panels generate more from fewer modules. Longi's back-contact (HPBC) design also helps in shaded or low-light conditions and runs with low degradation — the gradual annual loss of output — often around 0.35–0.4% a year after the first year. For Australian roofs that deal with heat, dust and partial shading, that combination is genuinely useful.

Thinking about Longi for your roof? Get a quote for a Longi solar system for your home — call 1300 859 066, email sales@bessaustralia.com.au, or request a tailored quote.

Longi warranty: up to 30 years

Longi backs its panels with a product warranty commonly of 12 to 15 years and a performance warranty of up to 30 years on its HPBC ranges — longer than the 25-year performance warranty most tier-1 brands offer. The warranty terms vary by model.

A product warranty covers defects in the panel itself, while a performance warranty guarantees a minimum output over time. On the Hi-MO 6 and Hi-MO 9 ranges, Longi's 30-year performance warranty guarantees the panel still produces around 87% of its original output after 30 years, with tight annual degradation limits. Older or value models may carry a 25-year performance warranty. Because terms differ between series, confirm the exact warranty on the panel quoted for your system.

How much do Longi solar panels cost?

Longi panels are positioned as value-to-mid-range within the tier-1 category, so they typically cost less than premium brands while offering comparable tier-1 quality — but the panel is only part of the price. What you actually pay depends on your whole system.

Solar panels are priced per watt, and Longi's per-watt pricing sits below premium names. However, the installed cost of a Longi system depends on your system size (in kW), the panel model and wattage, the inverter, your roof and the install — and STCs (the upfront solar discount under the federal scheme) reduce the total. So a headline panel price doesn't tell you much; the reliable figure is a quote for your specific system. You can see indicative options in our supply-and-install solar packages.

What affects the installed price

The installed price of a Longi solar system is driven mainly by system size, the panel model, the inverter, your roof and site, and the STCs applied. Two homes buying Longi panels can pay different totals.

Bigger systems cost more in total but often less per watt; premium HPBC models (Hi-MO 9, X6) sit above value models (Hi-MO 5m); and a more complex roof or a hybrid, battery-ready inverter adds to the cost. STCs then reduce the upfront figure, with eligibility depending on the product, install and current rules. An installer prices these together, which is also how you avoid an equipment-only quote that leaves out installation.

Longi vs other tier-1 panels

Longi sits alongside brands like Jinko and AIKO as a value-to-mid-range tier-1 option — dependable quality at a competitive price, rather than a premium price for marginal gains. For most homes, that balance is the sweet spot.

Where premium brands charge more for the highest efficiency and longest warranties, Longi offers strong efficiency (up to ~24%) and a market-leading 30-year performance warranty on its HPBC ranges at a mid-range price. If you're comparing panel brands, our solar and battery guides cover how the tier-1 options stack up — and the right choice usually comes down to your budget, roof and efficiency needs rather than brand name alone.

Who should choose Longi?

Longi suits value-focused homeowners who want proven tier-1 quality, strong efficiency and long warranties without paying a premium price. It's a solid all-rounder for most Australian roofs.

If you want a reliable, widely-installed panel with excellent warranty cover and good performance in Australian conditions, Longi is an easy shortlist entry. Buyers chasing the absolute highest efficiency or a specific premium brand might look elsewhere, but for the majority of homes focused on value and dependable output, Longi is a genuinely strong choice.

Pairing Longi panels with a battery

Longi panels pair well with a home battery, letting you store your daytime solar for the evening peak and lift your self-consumption. Solar and storage together do far more for your bill than solar alone.

Self-consumption — using your own solar rather than exporting it cheaply — is the goal, and a battery captures the surplus your Longi panels generate by day for use after dark. A solar-and-battery installation sizes the panels and battery together. Worth knowing: the panels earn STCs, while a battery may separately qualify for the federal Cheaper Home Batteries Program discount, which reduces over time through to 2030 (eligibility depends on the product, install and current rules).

A note for installers and trade

Electricians and installers can access Longi panels with trade pricing and Australia-wide delivery — a bankable, widely-recognised brand for residential and commercial projects. Longi's scale makes it a safe specification.

For trade and project work, Longi's tier-1 status and broad CEC-approved range make it easy to specify with confidence. And with the federal SRES solar rebate expanding to systems up to 1 MW from 1 October 2026 (subject to final regulations), Longi's higher-power panels are well placed for the larger commercial jobs that change opens up.

How BESS Australia helps

BESS Australia is an accredited supplier and installer of solar and battery systems, carrying Longi alongside other tier-1 solar panels under one roof. Because we're multi-brand, we can tell you honestly whether Longi — and which Longi series — suits your roof and budget, or whether another panel fits better, and apply any rebate you qualify for.

Our trust signals are straightforward: CEC-approved products (you can verify approval and guidance via the Clean Energy Council), Smart Energy Council membership, the NETCC Approved Seller consumer-protection code, installation by Solar Accreditation Australia-accredited installers, manufacturer warranties, a workmanship warranty, and Australian Consumer Law protections. We also offer a Lowest Price Guarantee and finance options. For independent guidance on choosing solar, the Australian Government's Your Home site is a useful reference. Any savings we discuss are estimates that depend on your household — never guarantees.

Get a Longi system priced for your roof. Ask BESS Australia which Longi panels suit your home and apply any rebate you qualify for — call 1300 859 066, email sales@bessaustralia.com.au, or use our request a tailored quote form.

FAQ

How much do Longi solar panels cost in Australia? Longi panels are priced as value-to-mid-range within the tier-1 category, so they typically cost less than premium brands for comparable quality. The panel is only part of the price — your installed cost depends on system size, the panel model, the inverter and the install, and STCs reduce the upfront figure. A quote for your system is the reliable number.

Are Longi solar panels good? Yes. Longi is a tier-1, bankable manufacturer and the world's largest solar panel maker by shipments, with strong efficiency (up to around 24% on its HPBC ranges) and long warranties. It's one of the most widely installed panel brands in Australia — a dependable, cost-effective choice for most homes. Exact specs vary by model.

What warranty do Longi solar panels have? Longi commonly offers a 12- to 15-year product warranty and a performance warranty of up to 30 years on its HPBC ranges (Hi-MO 6 and Hi-MO 9) — longer than the 25-year performance warranty most tier-1 brands provide. The 30-year cover guarantees around 87% of original output after 30 years. Terms vary by model, so confirm the exact warranty when you buy.

Which Longi panel series is best for homes? For Australian homes, the Hi-MO 6 and Hi-MO X6 series (using Longi's HPBC cell technology) are the most popular residential choices, offering strong efficiency and long warranties, while the newer Hi-MO 9 sits at the premium end. The older Hi-MO 5m is a value option. The right series depends on your roof space, budget and efficiency needs.