Right now there are 38 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Patio, Lawn & Garden › Generators & Portable Power › Renewable Energy › Energy Controllers. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: Renogy, Victron Energy, BougeRV, Litime, PowMr, SolaMr. Every item is a one-off, so the stock moves all day and new deals keep arriving.