 So this is the solar hot water panel prototype I've been working on here at Longway Home in the Guatemalan Highlands. It's a very basic design. It's just two bits of galvanized steel sheet bolted together. You can see the little bolts in the middle there to stop it from ballooning out. And then it's just wooden bolts around the edges to to batten that down and lock it off. Clear plastic on the front. It's a PVC plumbing for the year in and out and then just going up to this basic thermo-siphon thermo-siphon tank up here which has the cold water coming in to the bottom and then hot cold water going out from the bottom to the panel and then hot water coming in from the panel and then hot water going out from the top on the other top down to down to the shower. So the only sort of like wrinkle with put on that is the float valve at the bottom and that's because there's a good reason why people don't make panels in this configuration just like two big flat sheets put together and that's because of pressure if you plug this into the mains it would kind of explode because like the Pounds per square inch aren't necessarily that high But these there's a lot of square inches on that. That's two point eight square meters of panel So we've just got the water being fed from some head of concrete tanks which you can just see around that behind that building there. So it's only a couple of meters ahead, but it would still be enough to maybe damage the panel or maybe leak So we put the float valve on Just to isolate the pressure out from the head of the top of the tank Down to the down to the panel and that's holding together fine And the advantage of making a panel in this way is that it's super cheap and easy and also very effective because your entire Square meterage is has water right behind it like in between the two sheets of metal So currently it's about like 1 p.m. So it's about halfway through the day. It's been a quite a nice sunny day This water is now kind of painfully hot to touch. So it's about 50 degrees I had this up. So the hottest that this has been while I was testing it was about 80 degrees Which is hot enough to pasteurize water Um And that was without the cardboard insulation on the back and now without decent cladding A glazing on the front This box is then once this is all locked down going to be filled with insulation with um polystyrene and Pumice insulation you can see that the tanks sitting on a bed of pumice there So the everything that's here is about 40 dollars 30 or 40 dollars us um worth of materials We're wanting to get the the whole price down to about 500 kitsales for a Half-sized version so like a more of a home scale version in a smaller tank Um, because this is this is 220 litres this tank. It's 55 gallons Which is a huge amount like it's we there's a lot of people working on site here So like we needed that much water here, but on a home sort of scale you wouldn't need that much We're also going to workshop This out so like um teach everybody how to make it And give them the full list of materials and like where to get them locally and all that so that people can make their own People can sell them so it becomes like it's sort of like a Local sort of like cottage industry sort of thing people can be making and selling these things which means that also Um The people who have made it or so they're to maintain it and to improve it localize it and all that sort of stuff um Will also be workshopping My rocket mass heater design Because cooking fire smoke is like a major problem here as is like they're not being much fuel to burn For for cooking so and also just like heating of spaces and that so it takes a lot of those boxes And we workshopping that out in the same way and also um, probably if I have time doing a Basic two bucket sand and charcoal water filter because water Water cleanliness here is is a big issue as well So that's the yeah, so that's it. I'll be doing a Full tutorial of this once the design is more locked down But um so far it's It's working pretty well. Um the next version like I say will be half size So just like one bit of sheet cut in half and then front and back Um, but I'll also be using angle steel instead of the wood The wood works okay But it's just a little bit more sort of like solid and robust with the steel and the steel is cheap enough And we'll have both options available. I'll be doing like a second video with results I'll be testing like the efficiency of this and um Getting some numbers out and