Unfortunately, much of that article is behind a paywall, but I'll retract my statement.
In the bit I could read for free, the authors made a good point in that as oil becomes more scarce, the EROI has dropped from more than 100 in the 30's to more like 10 now (which is about where the authors place solar in an ideal location).
Notable is that that EROI drops significantly when solar energy is buffered (i.e. stored in batteries for sustained use), and notabe as well, is that higher EROI is for PV-cells in low latitudes in a desert, where if they are in a place like Canada, the return becomes much less (similar to the Germany numbers below).
Also, the EROI returns are much lower than other sources and are thus only minimally profitable. The paper and figure below have similar numbers to the one you quoted (which had a high EROI of 12 for PV-sources) and illustrate the problem.
http://energytransition.de/2014/09/r...es-ko-by-eroi/
CCGT = Combined Cycle Gas Turbine (nat. gas)