From the point of view of efficiency, solar heaters beat pv. With pv you need to convert the sun’s energy into electrical energy, with losses, then convert electrical energy into heat by extracting it from the outside with the heat pump. If you store it in batteries to heat up water later, there’s even more losses. Depending on the outside temperature, there’s a limit to what the heat pump can do, which an internal electric heater inside the water tank takes over to reach usable shower temperature.
With solar heating the sun heats water, that’s it. Not only you can yield energy from the sun more efficiently, this doesn’t need complex electronics or semiconductors, so it’s also better from an environmental impact point of view.
And it doesn’t have to be either/or. In my country, solar heating usually comes as a package deal with pv heating. Some companies are making hybrid pvs. Solar panels become less efficient as they heat up, so a hybrid pv would use coolant to keep them within their most efficient working temperature and extract that heat to be used for space heating, using radiators or floor heating or forced air systems, and/or water heating. Having both just makes sense, since it makes your pv needs (and your upfront investment) smaller and the maintenance on solar heaters is much simpler.
It’s hard for the whole world to do anything when the largest economy on Earth will undo any small step, political statement or protest with large amounts of cash, weapons and strong arming allied countries to agree with them via trade and sanctions, such as via the Anti Israel Boycott act H.R. 6940 which even affects the European Union. The whole world isn’t just standing aside. It’s just hard to stand on the path of the freight train that is the USA.
Nevertheless the ICC is proceeding, protest are occurring in many cities worldwide to embargo Israel and the UN is trying to prevent the US from sweeping this under the rug with constant world affirmations of rights of a Palestinian state and condemnations of Israeli actions, despite the US voting against.
Nobel prize winners are using their time in the spotlight to speak about it, presidents and prime ministers are urging more countries to stop trading with Israel, universities are refusing collaboration with Israel universities and exchange programs, investment capital is refusing to invest in Israeli companies and even Israeli tourists are being shunned abroad in several countries, including mine where they were booed on the streets. All this in the face of potential retaliatory action from the US.
Of course, it’s not what we hoped it would be or as effective as we need it to be for our dying Palestinian and Lebanese brothers and sisters, but it is a far cry from standing aside doing nothing. People are doing things and it would be a hell of a lot easier if the US either stopped helping the enemy or at the very least did nothing. I don’t wanna be writing “America bad” posts, I’ve been trying to make an effort to avoid making sweeping hot take statements about the US in general, but hot damn, in this case, i can’t help it. America very bad on Israel support and this will tarnish US international image for ages to come, even worse than the war on terror did.
The international community sees the US right now as the americans see Harris. It’s better than the alternative, sure, but we’d sure enjoy a whole lot less of genocide right about now.