“ Term is interchangelable depend on were you are in the world. "Solar module" or "solar panel" same thing. PUMP STORANGE HYDROPOWER is the same as Pump hydro storage..different name same concept.
Im not basing my argument because i just read and comments. My point is ive written a paper on this based on a research that ive done with couples of Japanese experts i he University a Osaka on how feasible this is for Tonga. It was something that we wanted to run through JICA ke fund. We study Vavau,HP, Eua and Niuafoou. Unfortunately, it can work but it will require alot of energy to pump and store the water, ee spend more energy pumping and with gravity feed (based on height) is not worth the investmenr. The cost is around $100+ to construct and operate but only for 1MW. That amount can be used for solar, wind or battery stroage or wave.
The study we did was out of my pocket as we did this in 2010 and we did presentation to the government and some communities about our finding. We also.present on potential geothermal area in hihifo ke dril e energy but cost about $1.5mil for test and samoling dril.
Anyways, all i can say is that the technical req for this is complex for "small brain" (like mine) but sai koe ko hoo paipa u will understand it more.No one said i know better..im just stating case based on a three year study that i did and i think im qualify to say the least.
"Wind is not blowing" come on where is your data on that" IUCN, JICA and MFAr did a study on that already and found that Niuatoua, Eua and Vavau have 6-7m/s wind speed. That is why JICA is installing 1.3MW in Niuatoua. Im staying overseas but even me im keep up with what happenig there. If you want to know the energy sources for that 50%, contact atu kianautolu ke atu e report oku asi ai. Ive contacted them and they provide the list of project, cost, funds, plan to get that 50%.
What im saying you cant get answer by just assuming that things are not clear and not even going to them and ask to satisfy your burning question. But i guess that how you make a living. Good luck with that ”