From the linked resource:

"Without bitcoin mining, solar - an intermittent energy source - could supply only 40% of grid power before utilities would face the need to fund significant investments with higher electricity prices. With bitcoin mining integrated into a solar system however, energy providers - whether utilities or independent entities - would have the ability to play the arbitrage between electricity prices and bitcoin prices, as well as potentially sell the “surplus” solar and supply almost all grid power demands without lowering profitability."