Fifth-wheel toyhaulers are the rig class we see most — they have the roof space for serious solar, a generator bay for backup, and enough interior room that owners actually live in them full-time or most of the year. We've also built systems for travel trailers (Airstreams, Lance, Outdoors RV), cargo-conversion trailers, and overlanding utility trailers.
A typical fifth-wheel system
- 800–1200 W solar (toyhaulers have the roof for it)
- 400–600 Ah lithium (for all-electric cooking + AC on inverter occasionally)
- 3000 W Victron MultiPlus-II with passthrough
- Generator integration (Onan start signal, transfer logic)
- Front-cap rebuild if previous installs have compromised the seal
Toyhauler-specific considerations
The rear garage means you've got two totally different use cases: full hookup at the owner's typical winter spot (where the system handles AC) and boondocking weekends where it has to run everything on battery. We size the system for the boondock case, which means the full-hookup case is over-built — that's fine, it means no stress and long battery life.
Recent trailer builds
(Portfolio filter — builds tagged rigType: "fifth-wheel" or "trailer")