LONGi Solar HQ, Quotes, Camping Solar Generators, and EV Charging: An FAQ From Someone Who's Made the Mistakes

I manage solar component sourcing for a small regional installer. Since 2019, I've ordered roughly 3,000 solar panels, including LONGi modules, and made maybe 11 mistakes that cost about $18,000 in reordering, shipping, and wasted labor. This FAQ is not a product review. It's the answer sheet I wish someone had handed me before I started.

• Where is LONGi Solar's headquarters?
• How do I get real LONGi solar panel quotes?
• Is a 120 watt semi-flexible solar panel worth it?
• What size camping solar generator should I buy?
• Can you charge an EV with a solar generator?

If you searched for 'LONGi solar headquarters' or 'longi solar panels quotes', you're in the right place. If you only read one section, read the EV one. I'll explain why.

Where is LONGi Solar's headquarters?

The short version is: LONGi Green Energy Technology Co., Ltd., the parent company behind the LONGi Solar brand, is headquartered in Xi'an, Shaanxi Province, China. According to LONGi's official website (longi.com), accessed January 2025, that's still the corporate headquarters.

This matters more than you'd think. In my experience, a quote is only as good as the entity behind it. I once got a quote for a pallet of LONGi panels from a broker whose invoice named a different seller than the brand. The price was about 11% lower than the next quote, but the seller couldn't produce an official LONGi datasheet or a serial number list. The broker stopped answering after I asked. I don't have hard data on how common that is, but three quotes like that have crossed my desk in the past 18 months.

How do I get real LONGi solar panel quotes?

If you searched for 'longi solar panels quotes' online, you probably found a mix of distributor price lists, aggregators, and maybe some installers. A real LONGi quote usually comes from an authorized distributor, not from LONGi itself. LONGi sells through regional channels, so the company's website will generally route you to a local partner.

Here's what worked for me in December 2024. I sent a short RFQ for 58 Hi-MO series modules, with a delivery zip code, a roof description, and a requested delivery month. The first quote I got was just a table of prices. The second quote included freight, lead time, and a model datasheet. The first was $0.03/W cheaper, but once crating and port handling were added, the second quote was actually lower. On 58 modules at roughly 400W each, that's about $700. Should mention: the second quote also included delivery to our yard, which the first one didn't.

My rule now is not simply 'get three quotes.' My rule is to get three complete quotes with the same model number, the same freight terms, and the same delivery window. A number without freight isn't a quote. It's a price list. I get why the cheapest quote is tempting; budgets are real. But the true cost shows up after the panels leave the factory.

Is a 120 watt semi-flexible solar panel worth it?

A 120 watt semi-flexible solar panel is a specialized tool. It's lighter than a glass-framed panel and can follow a curved surface. That makes it attractive for vans, boats, and curved shed roofs. But it is not a cheaper version of a rigid panel. It runs hotter, needs more airflow, and is easier to damage during installation.

In May 2022, I installed two 120W semi-flexible panels on a curved aluminum roof. I bonded them down with adhesive and didn't leave enough air gap. Fourteen months later, both were producing roughly 25% less than a rigid panel of the same rating under the same sun. The panels weren't junk. My installation was. The replacement cost me about $340 and a weekend.

One red flag: I'm not 100% sure whether LONGi currently sells a flexible panel in every regional market, but I've never seen an official LONGi datasheet for a 120 watt semi-flexible panel. If a quote says 'LONGi 120W flexible', ask for the official model number and datasheet. If the seller can't provide it, treat it as a rebranded panel with a big sticker.

What size camping solar generator should I buy?

First, a camping solar generator is not a generator. It's a battery with an inverter and a charge controller, and the panels are usually sold separately. Once you accept that, sizing gets easier.

Look at watt-hours, not just watts. A '500W solar generator' usually means the inverter can output 500W. It does not mean the battery holds 500Wh. If the battery holds 300Wh, a 500W coffee maker will run for roughly 25-30 minutes after inverter losses. That's enough for one mug, not for a group campsite.

I made this exact mistake in August 2023. I bought a 500W camping generator without checking the solar input limit—or rather, I checked the output limit and ignored the input limit. The onboard charge controller only accepted 100W, but I also bought a 200W folding panel. The 200W panel was limited to 100W. The return shipping cost me $37.

For a weekend of phones, laptops, LED lights, and maybe a CPAP, a 500-800Wh unit is a decent starting point. If you want a 12V fridge, go bigger. And always compare the panel's wattage to the generator's solar input limit. A 200W panel on a 100W limit is a slow charge.

Can you charge an EV with a solar generator?

Short answer: yes, but not the way most people mean.

The exact search phrase 'can you charge an ev with a solar generator?' gets a lot of attention, and the math is rarely pretty. According to the U.S. Department of Energy's Alternative Fuels Data Center, Level 1 EV charging adds roughly 2 to 5 miles of range per hour. A typical Level 1 charger draws about 1.4kW at 120V. If you have a 1,500Wh solar generator, it can run that charger for about an hour before the generator battery is empty.

Then the generator has to be recharged. With a 200W solar panel, a full recharge from empty takes around 8 to 9 hours. So on a perfect sunny day, your EV gains maybe 2 to 5 miles. That's useful in an emergency, but it's not a commuting plan. For a plug-in hybrid with a small battery, it might keep you from being stranded. For a long-range EV, it's an expensive top-up, not a charger.

If you want solar-powered EV charging at home, don't buy a 'solar generator' for that purpose. A larger off-grid system with fixed panels and enough battery capacity is a different project. It costs more, but the cost per useful mile is much better. To be fair, a portable solar generator is great for camping. Just don't sell it to yourself as an EV charger.