Ramp or Brex for a Solar EPC Running Concurrent Projects
For a solar and energy EPC contractor, each project needs its own card before the first permit fee, so permitting, interconnection and racking spend stays attached to one site for later incentive review. Mix spend on one general card and you're rebuilding that documentation from memory when a utility or tax equity investor asks for it.
Here's a rollout order that keeps project spend separated from day one, and where Ramp, Brex and Navan differ along the way.
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Why a project needs its own card before the first permit fee
The mistake most EPCs make is running the first few months of a project's spend through a general company card and planning to sort out the site attribution later, once things settle down. They don't settle down, and by the time someone tries to reconstruct which permitting fee belonged to which site, the receipts are scattered across whoever happened to be holding the card that week. Issue a project-specific card, or at minimum a project-specific cost code, before the first application fee goes out, not after the first project closes and the pattern is already set.
Racking and equipment deposits: matching a large prepay to your limit
A racking or major equipment deposit on a commercial installation can run well past a standard card's default limit, and a platform that requires a manual limit-increase request for every large prepay slows down a project timeline that's already tight against an interconnection queue. This is where Brex tends to fit better, since its limits track a company's cash position rather than a flat cap, which matters when a deposit needs to clear same-day to hold a delivery slot with a supplier.
Building a receipt trail that survives an incentive audit
Federal and state incentive programs, along with tax equity investors, can request documentation on a project years after it's placed in service, and a receipt that's coded to the wrong project or missing a vendor name is a real problem at that point, not a minor inconvenience. Require every project-tagged transaction to carry the project's name or number in the memo field at the time of purchase, since reconstructing that attribution from a bank statement alone, long after the fact, is close to impossible.
Where Ramp fits recurring project software and small vendor bills
Ramp's automated matching suits the steadier, more predictable side of project spend: design software subscriptions, small permitting-adjacent fees, and recurring vendor bills that repeat across every project you run. If most of your transaction volume is this kind of recurring, moderate-dollar spend rather than large one-time deposits, Ramp keeps it coded without much manual review.
A rollout order across concurrent projects
Start with your next new project rather than trying to retrofit a card structure onto projects already underway. Set up the project cost code, issue the project card, and require the memo-field discipline from day one on that single project. Once it closes clean and the documentation held up, apply the same structure to the next project you open, rather than rolling every active project onto a new system simultaneously and losing track of which project is on the old process and which is on the new one.
Follow this sequence when you introduce project cards:
- Pick your next new project as the pilot, rather than retrofitting a card structure onto projects that are already underway.
- Create the project cost code and issue the project card before the first permitting fee is paid.
- Require the project name or number in the memo field on every transaction from the first day.
- Confirm at project close that the documentation held up, then repeat the same structure on the next project you open.
Where Navan fits site-visit travel for project managers
If your project managers or engineers travel to remote installation sites for inspections, commissioning or utility meetings, Navan folds that travel booking into the same card program as project spend, which keeps a flight and hotel charge tagged to the same project as the permitting fees and equipment deposits around it. This helps most if site visits happen often across a spread-out project pipeline, and matters less if your projects sit close together in one region where a day trip covers most travel needs.
What tends to go wrong when projects overlap
The most common failure isn't a platform limitation, it's a project manager splitting time across two active projects in the same week and coding a shared purchase, like a bulk equipment order that serves both sites, entirely to whichever project comes to mind first. That single miscoded transaction can throw off both projects' documentation enough to cause a real problem at incentive filing time.
Set a hard rule for split purchases: any single transaction covering more than one project gets divided across project codes at the time of purchase, with the allocation logic noted in the memo field, rather than left as a judgment call for whoever reviews the books months later.
What Good Looks Like
Good spend management for a solar or energy EPC means every permitting fee, deposit and vendor purchase carries its project's name from the moment it's spent, so the documentation is already built when an incentive review or investor request comes in.
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How to Get Started
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Ramp fits the recurring side of project spend well, from design software subscriptions to small permitting-adjacent fees that repeat across every project you run.
Brex is worth considering for racking and equipment deposits specifically, since its limits track your cash position rather than a flat cap that a large same-day deposit could exceed.
Frequently Asked Questions
Should overhead spend, like the office lease, be tagged to a project?
No, keep general overhead separate from project-tagged spend, since mixing the two makes it harder to see true per-project cost and can complicate how a project's incentive documentation reads to a reviewer. Reserve project cards strictly for costs directly tied to that installation.
What happens if a piece of equipment gets reallocated between two projects?
Recode the original purchase to reflect the reallocation at the time it happens, with a note explaining why, rather than leaving the original project's records overstated and the receiving project's understated. This is exactly the kind of adjustment that's easy to do same-week and painful to reconstruct a year later.
Do we need a different card for site crews versus office staff?
Generally yes, since a site crew's spend (materials, equipment rental, fuel) behaves differently from office staff spend (software, travel to bid meetings, permitting fees), and separating them makes both easier to review. Structure limits and categories around what each group actually buys rather than using one template for everyone.
About the numbers
This guide doesn't quote a sourced benchmark. Figures in it are estimates or general guidance, so check them against your own numbers.
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