tictag

• tictag commented on kalefranklin's instructable Connecting Multiple Solar Panels5 months ago

I think you may have misunderstood the purpose of the blocking diode - this is only used to prevent the battery trying to 'power' the solar panels at night (or, to be more accurate, when the output voltage of the panel is lower than the battery voltage). The rule of thumb when connecting solar panels directly to a battery is never connect more than C/10 watts, where C is the capacity of your battery. For example a 110AH battery should never be connected to a panel more than 11W without a solar controller and, if you are using a solar controller, you do not need a blocking diode.So, assuming you're using a solar controller...The controller will have a 'maximum system voltage', which however you wire up the panels must not be exceeded e.g. series = 52v (36v + 16v = 52v). If this exceeds y...

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I think you may have misunderstood the purpose of the blocking diode - this is only used to prevent the battery trying to 'power' the solar panels at night (or, to be more accurate, when the output voltage of the panel is lower than the battery voltage). The rule of thumb when connecting solar panels directly to a battery is never connect more than C/10 watts, where C is the capacity of your battery. For example a 110AH battery should never be connected to a panel more than 11W without a solar controller and, if you are using a solar controller, you do not need a blocking diode.So, assuming you're using a solar controller...The controller will have a 'maximum system voltage', which however you wire up the panels must not be exceeded e.g. series = 52v (36v + 16v = 52v). If this exceeds your solar controller's spec, the only option you'll have is to wire in parallel. If OK, you then need to look at the 'max power current' value. When connected in series, this will end up being the maximum current flow, irrespective of the power rating of the panels. So, for example, if one is rated at 8A, the other only 5A, you will only ever get 5A at 52V = 260W. Mismatches in current spec when connected in series will effect overall performance.Parallel wiring in your case will probably be the worst option because, whilst the current will be additive, the overall system voltage will be limited to the lowest voltage panel i.e. 16V so, for example, you'll end up with 5A + 8A = 13A at 16V = 208W, which will inevitably be lower than a connection in series.If I were you, and because solar controllers are usually a lot cheaper than solar panels, I would buy another solar controller and operate each panel separately.Mismatched specification panels will always lead to a compromise in performance.

• tictag commented on sjowett's instructable Minitaure Weather Station - ESP82661 year ago

That was actually a reply to ThomasP157 who was asking about asking somebody else (you, initially) to make this for him. Sorry to cause confusion.

• tictag commented on sjowett's instructable Minitaure Weather Station - ESP82661 year ago

You'll find maker community sites all over the web that will do this for you. never used one myself but I know they exist.

This is one of the most thought out, detailed and helpful instructables I've seen. I will certainly be using it to aspire to. Excellent project, excellent instructions. Top class!!

• tictag commented on TechnicalKid's instructable PCB etching (prototyping)1 year ago

Best DIY PCB's I've ever seen.

• tictag completed the lesson Class Overview in the class 3D Printing Class1 year ago