80%. we re about to make a huge leap into lithium ion phosphate battery storage for stationary grids and small mini and micro grids. it s now cheaper to provide power this way than it is through dirty diesel generators or coal connected to grids that try to reach into these communities and do so poorly. in that case, why is the market not doing it already? why do we need the rockefeller foundation? most government utilities look at providing power to rural communities in particular as just a traditional lossmaker. to them you build a big coal plant near a city, connect it to a grid, the extra cost of connecting grid connections out to rural communities, to villages, to small towns and cities in those settings is expensive. and sthethen the power they del on it is erratic and their systems are not very good for doing that. these new systems are loaded with technology.