Are you sure sunamp is molten salt? To me, molten salt is to store energy at a very high temperature in insulated containers.
I thought sunamp is some kind of room temperature phase change material that does not require heavy insulation.
I thought sunamp is some kind of room temperature phase change material that does not require heavy insulation.
It does use a PCM, and that is described as a salt so maybe it's where the confusion comes from.
It also has far better insulation than equivalent devices (hot water cylinders). Typically VIPs, although I've read a few reports about the casing being compromised recently and that wouldn't play nicely with the panel.
- https://reneweconomy.com.au/mit-team-gains-ground-on-molten-...
- https://1414degrees.com.au/ (which looks like a competitor for malta)
(Not knowing much about the chemistry, I’m naively conflating the two)
Edit to add: Sunamp has non-zero heat loss, so it must be stored hot rather than room temperature, but it might not be very hot.