The best time to buy a portable power station or battery backup is before you need one. Right now, Amazon has the most popular BLUETTI models on sale at their cheapest prices of the year. That includes the 448Wh AC50B, which is just $279. Even on-sale, we’ve only seen it hit $299 at its very lowest. The deals also include some more robust models that come with solar panels to make them full-fledged solar generators. Jump on them before they sell out. BLUETTI Portable Power Station AC50B, 448Wh LiFePO4 Battery Backup $279 (was $399) Bluetti See It This 448Wh portable power station offers a pair of USB-C ports, a USB-A port, two standard AC outlets, a DC output, and an RV port. It weighs less than 15 pounds, can charge a flagship smartphone roughly 15 times, and it’s even powerful enough to run a mini-fridge for a few hours. Plus, it relies on a LiFePo4 battery instead of the older lithium-ion models, so it will last much longer over tons of charges. BLUETTI Portable Power Station AC50B with 120W Solar Panel Included $449 (was $598) BLUETTI Portable Power Station AC70, 768Wh LiFePO4 Battery Backup $379 (was $699) BLUETTI Portable Power Station AC180, 1152Wh LiFePO4 Battery Backup $499 (was $999) BLUETTI Solar Generator AC180 with 200W Solar Panel Included $799 (was $1,299) BLUETTI Portable Power Station AC200L, 2400W LiFePO4 Battery Backup $1,199 (was $1,799) BLUETTI Portable Power Station AC200L with 200W Solar Panel Included $1,299 (was $1,899) BLUETTI Portable Power Station AC200L with 350W Solar Panel Included $1,499 (was $1,999) The post Bluetti solar generators are at their lowest prices of the year during Amazon’s Prime Big Deal Days sale appeared first on Popular Science.