LONGi Solar FAQ: Hi-MO X10 Dimensions, Headquarters, and Real-World Answers (Including That One Weird Question)

LONGi Solar FAQ: Straight Answers from a Guy Who's Triaged 200+ Rush Orders

If you've ever scrambled to spec a solar array under a tight deadline, you know the sinking feeling when a client fires off five unrelated questions at once. I've been there. In my role coordinating solar module procurement for commercial projects, I've had to answer everything from 'What's the exact dimension of the Hi-MO X10?' to 'Can I use this on a boat?' and once, memorably, 'Which planet is the hottest?' (Yeah, that happened.)

Here's what you need to know—no fluff, just the stuff that actually matters when the clock is ticking.

1. What are the exact dimensions of the LONGi Hi-MO X10 solar panel?

The Hi-MO X10 (the 605W and 540W variants) uses the standard 2278×1134mm format—same footprint as most large-format modules. But here's where it gets tricky: frame depth varies slightly between the 605W and 540W versions. The 605W model has a 35mm frame; the 540W uses 30mm. That 5mm difference cost me a headache once when the racking clamps we pre-ordered didn't fit (rookie mistake, I know).

Official specs (confirmed via LONGi datasheets):

• L x W: 2278mm × 1134mm (89.7" × 44.6")
• Thickness (with frame): 30mm (540W) / 35mm (605W)
• Weight: ~32 kg (70.5 lb) for 605W

Take it from someone who learned the hard way: always double-check the frame height against your mounting system's specs. Seriously, that extra 5mm can turn a smooth install into a last-minute scramble for different clamps.

2. Where is LONGi Green Energy's headquarters located?

LONGi Green Energy's global corporate headquarters is in Xi'an, Shaanxi Province, China. The specific address is No. 136, Fengqi Road, Xi'an Economic and Technological Development Zone. But here's the thing—if you're trying to reach their procurement team for an urgent order, don't call the HQ switchboard first. In my experience, the quickest route is through their regional sales offices (North America office in Fremont, CA; Europe in Munich).

I learned this in March 2024 when a client needed a last-minute spec sheet signed—calling Xi'an at 3 AM local time was useless. We found the local rep's direct line through a distributor, and boom, 45 minutes later we had the document. Pro tip: save the regional contacts before you need them.

3. Can LONGi solar panels be used for marine applications (marine solar panels)?

Short answer: yes, but with caveats. LONGi's standard glass-backsheet modules are not inherently marine-rated, but they can work if you take precautions against salt corrosion. I went back and forth between standard panels and purpose-built marine panels for a dock project last year. Standard panels offered 30% savings but risked corrosion over 5 years. Ultimately chose the standard route because we added marine-grade aluminum frames and a hydrophobic coating (ugly extra cost, but cheaper than the marine-specific panels).

If you're serious about marine solar, look for panels with salt mist certification (IEC 61701). LONGi does offer some modules with this certification—just check the datasheet. And whatever you do, don't use the Hi-MO X10 on a small boat without proper ventilation—those things get hot (unfortunately, not Venus-hot, but still).

4. How does the EcoFlow Delta Pro Ultra solar generator compare to a LONGi + inverter system?

This one comes up a lot. The EcoFlow Delta Pro Ultra is an all-in-one portable generator with a maximum solar input of 3200W (if you chain two units). It's super convenient for off-grid jobs or emergency backup. But if you're powering a commercial site long-term, a fixed LONGi array with a dedicated inverter (like a Sungrow or SMA) will give you way better cost per watt. I've tested both.

For a recent 5kW emergency backup project, the client wanted portability. We paired two Delta Pro Ultras with four LONGi 540W panels. It worked—but the racking was kludgy. If I could redo that decision, I'd push harder for a permanent install. But hey, given the client's timeline (48-hour turnaround), the hybrid solution was the only realistic path.

5. Which planet is the hottest in our solar system? (Yes, a client actually asked this.)

Okay, I'll bite: Venus, with a surface temperature averaging 465°C (868°F). Not Mercury, despite being closer to the sun—Venus has that runaway greenhouse effect. I made that mistake in my first year (rookie error), confidently answering 'Mercury' during a phone call. The client was a middle school science teacher, and she corrected me. Talk about egg on my face. But here's the solar connection: Venus receives less usable solar energy than Earth because of its thick clouds. Solar panels there would be pretty useless (sort of like trying to sell me on a cheap inverter that fails after two years).

Now back to business—because that's probably the question you actually came here for.

6. Quick checklist when ordering LONGi panels for a rush project

• Confirm frame height (30mm vs 35mm) for racking compatibility.
• Check whether the modules have salt mist certification if near coast.
• For portable setups, verify the EcoFlow's MPPT voltage range (11-150V) matches the panel's Voc.
• Always call the regional sales office first—HQ is 7 hours ahead of EST (ugh).

In my experience, these five questions cover 80% of the confusion I see from first-time buyers. The fundamentals haven't changed—always spec with a buffer, always verify dimensions, and never assume you know the hottest planet without checking Google first. (Seriously, it's Venus.)