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Hi not2beme - you are right… there are a (small) number of companies here in Australia selling off reclaimed older domestic sized panels, though they tend to want to sell you an entire batch rather than just one or two, and only deal in the larger 18v domestic sized panels - which are too big...

Many thanks once again Korishan, for sharing your wisdom and advice :) I’m not likely to ever want to charge more than 1S2P in my little chargers (but it’s nice to know I could), and the 2P comes from pairs of cells that have been connected in parallel their whole lives - I harvest them from...

Many thanks Korishan. Your comparison between the two options is very interesting. Unfortunately, my TP4056 modules (sourced from China ebay seller, so yes, entirely possible they will be clones or QC rejects) are already in transit, but they didn't cost much, so I may swap them out and use...

Many thanks for your detailed explanation, Oleksii. I’m not sure if you misread my title, or were responding to the previous post in which overheating was discussed. My original question was actually about how much of an overhead (with a D) the TP4056 circuitry caused, like how much current is...

Many thanks for the insight ajw22. I hadn't thought too much about the excess energy, but was intending mount a small laptop fan alongside the units. I'll maybe have a rethink and put some sort of heatsink across the chips too. Thanks also for the suggestion of the TP5100 - I hadn't even...

Hi all, I am ordering a bunch of TP4056 and single cell 18650 holders, with a view to building a charging station for up to 5 individual 18650 cells. The TP4056 modules will all be run from a common regulated 5v supply, but I am wondering what kind of current will be drawn from it if all 5...

Hi again Italianuser - ah yes, local regulations and neighbours… not sure which is more restrictive! I am lucky in this respect - I am not restricted by living in an apartment, and have a garage/shed on my property with a roof that is reasonably well angled for catching the sun, with no...

Many thanks Italianuser. If only we could build the PV Panels themselves cheaply, eh? At the moment - PV Panels are the most expensive elements in all of my project plans. BTW - do your panels really need to be mounted on a metal frame? One of my hobbies is woodwork, and I intend to build...

Hi all. Having just retired from a lifetime working in IT, I find myself with the time to finally start dissecting all those laptop batteries I’ve accrued, testing the 18650 cells, and am thinking about how to use them. Living in sunny Australia, I am keen to harness solar energy to keep the...