ARM also make considerable income from partnering with these companies to design their chips.

30MW x Capacity Factor (0.54) x 24 hours = 388.8 MWh per day. Divide that by the number of households and that's 11.4KWh per day. On a winters day, that probably isn't enough but also, the Capacity Factor for a winters day may be higher and I'm assuming the 54% is for the total lifetime of this farm. 25KWh a day sounds a realistic number for an electric car and heat pump in winter, a capacity factor of 100% wouldn't power 34,000 homes. Keeping the same capacity factor, the 30MW could only power 15,000 homes consuming 25KWh (388.8 / 25 * 1000).