They help, but even in full sun with a decently-sized panel on a trailer you’ll still only be slowing the battery drain. If your trip is long, sunny, and has no access to the grid, then they can make a lot of sense, but if you have any grid access at all, a second battery is usually a better choice.
![[image][discussion] Why don't we have more options for recreation without cars? I don't want access to nature to be gatekeeped behind car ownership.](https://lemmy.world/pictrs/image/c5badb62-bef8-4e6e-93d1-d89ef597a73f.jpeg){kind=link}
They help, but even in full sun with a decently-sized panel on a trailer you’ll still only be slowing the battery drain. If your trip is long, sunny, and has no access to the grid, then they can make a lot of sense, but if you have any grid access at all, a second battery is usually a better choice.