Solar installations are rocketing worldwide as solar electricity becomes cheaper than electricity from fossil fuels – it’s already happened in 105 countries. This is the tipping point where economics takes over from altruism and solar PV becomes a serious part of the global energy mix.The steady drop in cost-per-watt is great news for the end user and is enabled by simultaneous increases in cell efficiency and lower manufacturing costs.If you’re a cell manufacturer, though, dropping prices are a double-edged sword: strong demand is good, but you must continuously lower costs by improving your manufacturing processes in order to be profitable.So, in a fiercely competitive industry, how is this done?After the jump, we’ll look at a great example of how cell manufacturers can boost profitability using an emerging technique called “double printing”.