This is a genuine recommendation, not a paid link — we earn nothing if you contact Tri-Span. We list them because they did clean work on our own van and we trust it.
Some of the partners on this site earn us a referral; this one does not, and we are saying so plainly. Tri-Span Upfitters is the vehicle electrician who wired our own van, and we recommend them because of the work, not because of a kickback. There is no affiliate link here and no commission — just an honest pointer to someone we trust with our own setup.
What they did
Tri-Span did all the electrical on our van: the DC-to-DC charging that tops the house bank off the alternator as we drive, the solar, and the house battery bank itself. It is the part of a build that is easy to get wrong and expensive to fix later, and theirs has been clean and reliable. When the system is the difference between a working fridge and a dead one in a parking lot, that reliability is the whole point.
When to bring in a pro
The off-grid power and solar sizing guide covers how to think about the system and the portable route you can set up yourself. A wired house-battery system is the other path, and it is the one where a professional pays for itself. High-current DC wiring, alternator charging, and a properly fused battery bank are safety-critical; done wrong they are a fire risk, not just a performance problem. If you are wiring a permanent system and you are not confident in the high-current side, this is the work to hand to someone who does it for a living.
The short version
Tri-Span Upfitters wired our van — DC-to-DC charging, solar, and the house batteries — and we recommend them without reservation and without earning anything from it. If you are doing a wired electrical system and want it done right, reach out through their Instagram. Read it alongside the solar-sizing guide to know what you are asking them to build.