How StratoSolar stores energy at a low cost
- Low cost buoyant support platform in the stratosphere
- Off the shelf motor generator and winch technology
- Weight on cable stores 54Wh/kg at 20km altitude
- Fast response time for load following and peaking
- better than 85% round trip efficiency
- Long life exceeding 15,000 cycles or thirty years without degradation
- No dependence on geography. Hills or caverns are not required
- Scale-able from 1MW to many GW in increments
- Same buoyant platform elements can provide PV generation for a complete dispatch-able electricity solution
- Capital cost less than $100/kWh and/or $1/W in production