Yoshino B2000 SST Review: The World's First Solid-State Power Station

Every portable power station on the market uses one of two battery chemistries: lithium-ion NMC or lithium iron phosphate (LiFePO4). The Yoshino B2000 SST uses neither. This is the world’s first commercially available portable power station with a solid-state lithium battery — the same technology that automotive giants like Toyota and BMW are racing to bring to electric vehicles. Yoshino got there first in portable power, and the results are genuinely interesting: 1,326Wh of capacity in a 31.3 lb package, making it the lightest power station in the 1000Wh+ class by a significant margin.

Key Specs at a Glance

• Capacity: 1,326Wh (Solid-State Li-NCM)
• Max Output: 2,000W continuous / 3,000W peak
• Weight: 31.3 lbs
• Battery Type: Solid-State (2,500 cycles to 80%)
• Charge Time: 55 minutes wall (0-100%) / 45 minutes to 80%
• Ports: 4 AC, 1x USB-C PD (100W), 1x USB-C (20W), 2x USB-A, 2x 12V DC, 15W wireless charging pad
• UPS: 10ms switchover

Who Is It For?

Tech-forward buyers who want cutting-edge battery technology and prioritize portability above all else. At 31.3 lbs for 1,326Wh, the B2000 SST is roughly 25% lighter per Wh than comparable LiFePO4 units. If you frequently carry your power station — hiking, van life, moving it between rooms during outages — the weight savings compound quickly. Early adopters willing to invest in emerging technology rather than waiting for it to mature will also find this compelling. If you prioritize proven longevity and the lowest cost per Wh, a LiFePO4 unit like the EcoFlow DELTA 3 Plus or Anker SOLIX C1000 Gen 2 remains the safer bet.

What Is Solid-State Battery Technology?

Traditional lithium batteries use a liquid or gel electrolyte to shuttle ions between the anode and cathode. Solid-state batteries replace that liquid with a solid ceramic or polymer electrolyte. The advantages are significant: 2.5x higher energy density (more Wh per pound), no liquid to leak or catch fire, wider operating temperature range, and faster charging potential. The B2000 SST is the first portable power product to commercialize this technology. It is worth noting that “solid-state” in consumer electronics is still evolving — Yoshino’s implementation uses a solid electrolyte with conventional electrode materials, which is different from the fully solid-state cells still in development for EVs.

31 Pounds for 1,326Wh

The energy density advantage of solid-state is immediately obvious. At 31.3 lbs, the B2000 SST weighs less than most 1000Wh competitors on a per-Wh basis. Pound-for-pound, you get roughly 42.3Wh per pound — a figure that edges out most LiFePO4 units in this capacity range. Where the B2000 SST truly shines is in the absolute weight: 31.3 lbs with 1,326Wh is a combination that no LiFePO4 unit currently matches. You can carry this one-handed and still have enough juice to run a refrigerator for 10+ hours. Compare this to the Jackery Explorer 2000 v2 at 39.5 lbs for 2,042Wh, or the Segway Cube 2000 at 57.5 lbs.

55-Minute Full Charge

The B2000 SST charges from empty to full in 55 minutes via wall outlet, with 80% reached in just 45 minutes. This is competitive with the fastest chargers in the industry — the Anker C1000 Gen 2 at 49 minutes and the EcoFlow DELTA 3 Plus at 56 minutes — despite having 300Wh more capacity than either. Solar input accepts up to 600W, completing a full solar charge in roughly 3 hours with compatible panels like the EcoFlow 400W plus a supplemental 200W panel.

11-Port Layout With Wireless Charging

The B2000 SST’s port selection is generous: four AC outlets handle multiple appliances simultaneously, the 100W USB-C PD port fast-charges laptops, and the built-in 15W wireless charging pad is a convenient touch that no other power station in this class offers. You can set your phone on top of the unit and it charges — no cable needed. The two 12V DC outputs are useful for RV accessories and 12V-powered devices. The total port count of 11 exceeds most competitors at this capacity.

The Trade-Offs: Longevity and Price

Here is where the new technology shows its age. The B2000 SST is rated for 2,500 cycles to 80% — solid by NMC standards, but well below the 4,000+ cycles offered by LiFePO4 competitors like the EcoFlow DELTA 3 Plus or Segway Cube 2000. At roughly $1,199 retail, the price per Wh ($0.90) is significantly higher than LiFePO4 alternatives. Yoshino offers a 5-year warranty, but the brand is still young — founded in 2022 — and there is no long-term field data on how solid-state cells age over many years of real-world use. These are valid concerns for a technology that is genuinely new to the consumer market.

What Could Be Better

The 2,500-cycle rating trails LiFePO4 competitors. At $1,199, the cost per Wh is not competitive with the Segway Cube 2000 at $0.26/Wh or the ALLWEI 1200W at $0.50/Wh. The 20W second USB-C port feels stingy when competitors offer dual 100W+ ports. The ETL certification is reassuring, but the solid-state battery technology has not been field-tested over the 5-10 year timeframes that LiFePO4 batteries have proven themselves. And the lack of expandable battery options means 1,326Wh is all you get — no scaling up later.

The Bottom Line

The Yoshino B2000 SST is a fascinating product that previews the future of portable power. The solid-state battery delivers genuine weight savings and fast charging in a well-built package with an excellent port selection. But it is a first-generation product with a premium price tag and shorter cycle life than established LiFePO4 competitors. Buy it if you are an early adopter who values light weight and cutting-edge tech. Wait if you want proven longevity and better value per Wh. Either way, solid-state batteries in portable power stations are no longer a concept — they are a product you can buy today, and the Yoshino B2000 SST proves the technology works.

More options: Best portable power stations for 2026 | Best power stations under $1,000 | LiFePO4 vs NMC batteries explained