How do you evaluate a new supplier?

Sooner or later a large national supplier is going to offer to take your hardware program off your hands. One vendor instead of six. Bins on your sites, restocked for you. A portal that ties into your system. A dedicated rep. And all of the bells and whistles you could dream of.

It's a serious offer, and sometimes it's the right one. But the proposal and the program are two different things, and the distance between them doesn't show up for months. By then the old vendors are gone and the switching costs are real.

So the question worth answering before you sign isn't whether the proposal is good. It's what has to go right, every week, for it to come true. That's what you're actually evaluating, and it comes down to a short list of unglamorous things.

What gets promised

The offer is usually some version of the same four things:

  • Consolidation. Fewer vendors, fewer invoices, one point of contact. Time given back to your team, with the vendor doing the heavy lifting.

  • Managed inventory. Bins on your sites, counted and restocked so your crews stop running out and your team stops writing purchase orders for small stuff.

  • Technology. Scanning, dashboards, usage reporting, integration with your systems, visibility you don't currently have.

  • Savings. A projected number, built on volume leverage and standardization.

Every one of those is achievable. None of them is what actually determines whether the program works.

The basics that decide it

What decides it is whether the people running your program understand the hardware you use.

Someone has to know which of your items move fast and which sit. Someone has to know that two parts which look interchangeable behave differently once they're installed, and which one you need. Someone has to know what to do when your default item is months out and the schedule won't wait, which means knowing what can be substituted without creating a problem downstream. Someone has to know how to source or manufacture the custom items your engineer just asked you to buy.

None of that is in the proposal, and none of it is solved by fancy tech.

An automated replenishment system is very good at reordering what was used. It has no opinion about whether what was used was the right part, let alone the most economical.

When that understanding isn't there, the failures are predictable and they all look like small things:

  • Bins run overfull on the easy, high-turn items, which means you're paying to hold inventory you don't need yet.

  • The items you actually burn through run empty, because those are harder to forecast.

  • Restocking depends on someone showing up, and the visits land on no schedule you can plan around.

  • Bins get filled with the wrong item, or don't get filled at all.

  • Line items you've bought for years quietly come back priced higher than what you've been paying.

Individually, each is a nuisance you work around. Together, they're a program that isn't working.

What this looked like at one account

We watched this happen at a customer of ours, one of the largest solar installers in the Northeast. We had a front-row seat because we were the vendor being replaced.

New leadership was won over by an industrial hardware titan and the full package: the numbers, the managed inventory, the integrations. Over the course of three years, the business changed hands.

But what did the folks on the floor actually get? Overstocked bins that didn't match consumption. Technology that was supposed to simplify everything, often either empty or complicated enough that people stopped using it. And reps who barely showed up - and when they did, the visit was transactional.

And the experience inside their purchasing department? Line items we'd supplied for years, some of them coming back at double our price. We won't pretend to know how anyone else's catalog is priced, but that's what we saw on parts we knew.

The part that decided it, though, wasn't price. It was that nobody from that supplier ever learned the ins and outs of this customer's hardware, so there was no one to call when something went sideways.

Frank, our account executive who serves this customer, put it simply:

"Every time I stopped in, I'd hear the same gripe from everyone there: 'These guys just don't get us, and don't care to find out.'"

That account is back with us now. It didn't come back because anyone in the office reconsidered the spreadsheet. It came back because the people on the floor kept raising the same complaints long enough that leadership's decision became an easy one.

When the big program is genuinely the right call

It would be self-serving to say these programs never work, and it isn't true. We run them too. They work best layered on top of a supplier who already knows your hardware, rather than as a substitute for one.

If you're buying broad, low-value consumables across a lot of locations, a national program with real logistics behind it is hard to beat. If your item list is standardized, high-volume, and doesn't change much, automated replenishment will handle it well. And if you're carrying too many vendors with no leverage, consolidating some of that spend is a legitimate move that will save you money and time.

The mismatch happens when work that's actually specific gets treated as though it's standardized. If your item list shifts by job, if substitutions matter, if the wrong-but-similar part creates rework or returns, that's a different problem than restocking gloves across dozens of branches.

What to ask before you sign

Larry, who started Melfast in 1985, has watched this play out plenty of times:

"A lot of our customers have been approached with an offer like this. A few said yes. Almost all of them came back. It's always the same story: lots of promises, but nobody who actually understands their hardware."

The questions below are how you find that out before you sign, instead of a year in. They apply whether a supplier is bidding on your whole program or one corner of it. Take the proposal and ask:

  • Who services this account, and what do they know about our work? Ask to meet them before you sign, not after. Ask what they'd substitute for one of your specific parts if it went on allocation, and listen to whether the answer is a real answer or a promise to find out. Then ask the same about your custom and hard-to-find items.

  • It's also worth knowing who you're actually buying from behind the logo, because on the day something goes wrong, that's who has to solve it.

  • How often do bins get serviced, and what happens when a visit gets missed? Get it in the agreement, not the pitch.

  • Am I paying to hold inventory I don't turn, and how would I see that? Ask how min/max levels get set and who reviews them.

  • What happens on an item that's out of stock nationally and needed Friday? Every supplier has a good answer for the easy case.

  • How will we price-check this in year two? Savings projections are built at signing. Pricing drifts after, and the drift is easiest to catch on the items you buy constantly and know cold.

  • What does it cost us to unwind this? If the program consolidates six vendors down to one, the other five relationships go quiet, and rebuilding them takes longer than anyone expects. Know the exit before you need it.

Then set a date six to eight months out to walk the bins yourself. That's where you'll find out whether the program is working, and it's early enough to do something about it.


The custom and hard-to-find items are usually where these programs fall down. That's the part we're built for. Reach us at [email protected].

Next
Next

What exactly do solar installers need to document for the tax credit bonus?