Solid-State Battery Statistics 2026: The Next EV Leap
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Solid-state batteries promise more range, faster charging, and better safety. Here are the key solid-state battery statistics for 2026.
Key findings at a glance
- Up to 500 Wh/kg energy density (Samsung SDI).
- 10–80% in ~12 minutes (QuantumScape).
- Toyota targets 2027–2028 production.
- 95%+ capacity after 1,000+ cycles.
Source: QuantumScape
Solid-state energy density statistics
- 844 Wh/L · 301 Wh/kg QuantumScape's QSE-5 verified energy density. (QuantumScape, 2025)
- 500 Wh/kg · 900 Wh/L Samsung SDI's confirmed solid-state specs. (Samsung SDI, 2025)
- ~12 minutes to charge 10–80% in QuantumScape's cell. (QuantumScape, 2025)
Durability & timeline statistics
- 95%+ energy capacity retained after 1,000+ charge cycles in PowerCo testing. (PowerCo / QuantumScape, 2025)
- 2027–2028 Toyota's target for solid-state mass production (initial output from 2026). (Toyota, 2025)
- ~500 Wh/kg the energy density expected at volume production by 2030. (Industry, 2025)
Until solid-state arrives, today's lithium-ion EVs still deliver — see our EV battery statistics and shop home chargers built for current EVs.
Summary table
| Metric | Figure | Source |
|---|---|---|
| QuantumScape density | 844 Wh/L · 301 Wh/kg | QuantumScape |
| Samsung SDI density | 500 Wh/kg · 900 Wh/L | Samsung SDI |
| 10–80% charge | ~12 min | QuantumScape |
| Cycle durability | 95%+ at 1,000+ | PowerCo |
| Toyota production | 2027–2028 | Toyota |
Frequently asked questions
When will solid-state EV batteries arrive?
Toyota targets mass production in 2027–2028, with initial output from 2026.
How much better are solid-state batteries?
Up to ~500 Wh/kg energy density and 10–80% charging in ~12 minutes (Samsung SDI / QuantumScape).
Are they durable?
Early testing shows 95%+ capacity retained after 1,000+ cycles (PowerCo).
Related reading
Sources & methodology
Compiled by the ePlug Kit team from primary and tier-1 industry sources, June 2026: InsideEVs; QuantumScape & Samsung SDI disclosures. Figures are current as of publication and rounded for readability.