First Solar Procurement in 2025: A Field Checklist I Wish I Had Before My First Order

If you're a utility-scale developer, IPP, or EPC contractor trying to decide whether First Solar modules are right for your project, you've probably already read a dozen reviews. If you've been searching 'first-solar' and getting lost in press releases, this is for you. This is not another review. This is the checklist I wish someone had put in my hands before my first First Solar order.

I've spent the last eight years in field engineering and procurement for solar projects. I've made (and documented) seventeen significant mistakes on module-related purchases, totaling roughly $214,000 in wasted budget and delays. The worst part? Most of them were avoidable. So now I keep this checklist and I walk my junior engineers through it every time we plan a new procurement cycle.

Who this checklist is for

Use this when you're about to evaluate or order modules for a large-scale ground-mount project, or when you're adding First Solar modules to a portfolio and need to avoid the common pitfalls. It assumes you already know how to read a datasheet, but not necessarily how to turn that datasheet into a field-proof purchase order.

There are seven steps. Do them in order, or at least do all of them before you sign anything.

Step 1: Pull the First Solar FSLR financials 2025 report, not just the analyst price target

It's tempting to type 'first solar fslr financials 2025' into Google and grab the first analyst summary. I've done that. But when you're relying on a manufacturer's warranty for 25-30 years, you need to understand the financial health behind that warranty, not just the stock momentum.

Look at the First Solar investor relations page for the latest 10-K or 10-Q. Focus on net sales, gross margin, operating cash flow, ROIC, and contracted backlog. First Solar has reported roughly 66 GW of backlog as of early 2025, and that kind of visibility matters for delivery schedules. The first solar analyst price target can change on a week's whim (I've seen it go both ways in the same month). It's a useful data point, but it's not a substitute for reading the balance sheet.

Granted, I'm not a financial advisor. But from a buyer's perspective, a supplier that is expanding manufacturing capacity and holding a large backlog is more likely to honor a warranty claim in year 15 than one that's bleeding cash.

Step 2: Read the module datasheet like a lawyer, not a salesperson

First Solar makes thin-film cadmium telluride (CdTe) modules. Their Series 6 Plus and Series 7 panels are designed for utility-scale plants, and the performance specs are different from conventional silicon panels.

Pay special attention to:

• Nameplate power and power tolerance (Series 6 Plus 460W is common, but verify the exact model for your project).
• Annual degradation rate. First Solar advertises ultra-low degradation, often below 0.5% per year. That makes the 25-year production estimate more predictable.
• Temperature coefficient, which is better than many people expect for thin-film.
• Module dimensions and weight. This sounds obvious, but I once designed a tracking layout around a 72-cell silicon panel and then switched to First Solar without recalculating wind loads. That was an expensive lesson.

In my opinion, the 'efficiency gap' between CdTe and monocrystalline silicon is overblown for ground-mount projects. A lower area efficiency can mean a slightly larger array footprint, but if the project is land-rich and energy yield is what pays the loan, the degradation rate matters more than the cell efficiency number.

Step 3: Verify the shipping and receiving process before the truck arrives

In my first year (2017), I approved a module shipment based on the datasheet and completely ignored the crate dimensions. The truck arrived, and our forklift couldn't lift the first crate. We spent the day renting a bigger forklift and rescheduling the crew. That was about $2,800 in waste and a full day of delay.

Then in September 2022, I made the same category of mistake in a different way. I signed a delivery receipt 'unchecked' because the driver was in a hurry. When we opened the crates two days later, we found cracked glass on several modules. The freight company denied the claim because I'd signed without noting damage. Looking back, I should have required photos before signing. At the time, the delay seemed more important than the paperwork. It wasn't.

Add this to your checklist:

• Know the exact crate weight, length, and lifting requirements before the shipment schedules.
• Take photos of every crate before opening and after opening.
• If you see any damage, write 'damage noted' on the delivery receipt and photograph the damage.
• If possible, open a sample crate before the driver leaves.

Step 4: Plan surge protection and EV charging infrastructure separately

This is where I blew far more than I care to admit. On one site, we were installing a First Solar array and a small home EV charging station as part of a demonstration project. My crew searched for '30 amp surge protector near me' and bought a surge protector intended for an RV pedestal. It was not certified for the PV, charging station, and utility requirements we needed.

That surge protector failed during a utility testing event. Since we installed it inside the equipment enclosure, the failure also took out the EV charger's controller. The total repair cost was around $6,500 and we lost two weeks of schedule. The lesson: 'near me' is fine for a hardware store, but not for compliance-critical equipment. Check the UL 1449 Type rating before buying a surge protector, and make sure the device matches the nominal voltage and fault current at your site.

If you're also handling a home EV charging station La Fayette GA project, don't assume it can piggyback on the solar permit. I learned the hard way that the local building department treats the EV charger as a separate electrical installation. The first inspection failed because we hadn't pulled a permit for the charger. It was a 45-minute fix at the permit counter, but it delayed the interconnection approval by five days. In my opinion, that's the kind of self-inflicted delay that hurts credibility more than the schedule.

Step 5: Verify inverter compatibility before the modules are on a truck

Thin-film modules have a different current-voltage curve than crystalline silicon modules. Your inverter's maximum input voltage, MPPT range, and minimum MPPT voltage all need to line up with the module spec.

This is the step most people rush. The datasheet says 'STC' and you assume it will work. Then you discover that the maximum system voltage is lower than the tracker's temperature-adjusted string voltage. I've seen a 200-MW project get delayed for a week because the string length was calculated with the wrong module temperature coefficient.

Use First Solar's official modules in your string-sizing software, not a generic 'thin-film' profile. If your engineering team doesn't have the exact I-V curve data, ask the manufacturer for it. Trust me on this one: the extra email is easier than the change order.

Step 6: Remind your traveling crew about portable power bank rules

This seems small, but it keeps showing up. When your commissioning crew flies to a remote site, someone always brings a portable power bank that doesn't meet the airline rules. The question 'are portable power banks allowed on airplanes' comes up every year.

The short answer per TSA guidance: spare lithium-ion power banks belong in carry-on bags, not checked luggage. If the rated capacity is below 100 watt-hours (roughly 27,000 mAh), it's generally fine. Between 100 and 160 watt-hours, you need airline approval. Above 160 watt-hours, it's not allowed. I learned this when a technician with a 30,000 mAh power bank had it pulled at security because the label wasn't readable. He had to surrender it. It was a $60 power bank, but the real cost was the 20 minutes of panic before we could reach him.

Put a battery-label check in your pre-travel checklist. It's a no-brainer that saves a headache.

Step 7: Create a pre-order review with a 'break it' step

After the third mistake in Q1 2024, I finally built our team's formal pre-order checklist. It includes all the technical points above plus one final step: pretend that everything that can go wrong in the field will go wrong. Does the packaging have clear handling instructions? Are the connectors labeled? Is the RMA claim process documented? Does your team know who to call if a module arrives damaged?

That last step has caught 47 potential issues in the last 18 months. Not all were project-ending, but most would have been expensive.

Common mistakes I still see on First Solar projects

• Copying a prior project's electrical BOM without checking the surge protector's fault current rating.
• Assuming the home EV charging station permit is included in the solar permit (it often isn't, especially in rural Georgia).
• Using a stock analyst price target to make warranty-risk decisions.
• Forgetting that module dimensions affect tracker row spacing, cable tray routing, and wind loading.
• Ignoring local utility requirements for lockable disconnects and external surge protection. If your utility inspector has a specific requirement, the national datasheet won't tell you that.

Bottom line

First Solar's CdTe modules are a solid choice for many utility-scale projects. But 'solid choice' doesn't mean 'zero risk.' The risk lives in the details: financial health, datasheet interpretation, freight handling, surge protection, permitting, and travel logistics. The good news is that those are all manageable if you have a checklist and the discipline to follow it.

Take it from someone who made the mistakes for you: the cheapest mistake costs a phone call. The expensive ones cost a delivery. Don't be the next person who signs an unchecked delivery receipt.