100W solar panel

wildebus said:
makes a difference compared to doing it the other way round? wouldn't know as I only do it the right way round ;)
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Connecting the panel to the regulator before the batteries bu--ers them up, same as running a car or m bike with a dead or no battery wrecks the regulator and can blow diodes in a bridge rectifier, are you clear on this now.
 
trevskoda said:
Connecting the panel to the regulator before the batteries bu--ers them up, same as running a car or m bike with a dead or no battery wrecks the regulator and can blow diodes in a bridge rectifier, are you clear on this now.
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talking to the wrong person :)
 
The people who made it don't even speak English. The instructions are usually written by people who know nothing of the product and have never even seen it.
The reason to connect the battery first is simply so that it can tell whether it is powering a 12v or a 24v system. Even then it doesn't seem to matter, in my actual experience.
If the panel is a 12v one (so it gives 16v open circuit) it cannot be a 24v system.
MPPT solar regulators" normally only have buck circuitry, and can't boost. So 12v panel means 12v battery.
*Except B2B chargers that have MPPT controllers: they have both buck and boost abilities.
 
So when you have panels with a higher voltage (or panels in series, you're doing it wrong, it does matter which order you connect.
 
If you have panels putting out over 20v at the time of connection, it might matter. In my experience, it doesn't, but it could with some controllers.
 
Geek said:
You may think so. I know different.
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Perhaps you meant "translated by someone who doesn't know the product." That I would agree with, but doesn't mean that the instructions don't reflect what you should do with the product.
 
Geek said:
The people who made it don't even speak English. The instructions are usually written by people who know nothing of the product and have never even seen it.
The reason to connect the battery first is simply so that it can tell whether it is powering a 12v or a 24v system. Even then it doesn't seem to matter, in my actual experience.
If the panel is a 12v one (so it gives 16v open circuit) it cannot be a 24v system.
MPPT solar regulators" normally only have buck circuitry, and can't boost. So 12v panel means 12v battery.
*Except B2B chargers that have MPPT controllers: they have both buck and boost abilities.
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Can you find me a 12V Panel that has a 16V Open Circuit Voltage output please? I don't want buy it but I sure want to avoid it :D

Now with your "experience" you will of course be well aware that should you have one of these Unicorn brand Panels, you could not even use it with an MPPT controller from a popular brand such as Victron as that won't even turn on until the PV Voltage in is greater than 5V higher than the Battery.
(unless your use of Solar is such that you don't want to use it until the battery is below 11V? that would be a 'novel' approach ;) )


I suggest you try some sage advice you were given earlier ....
St3v3 said:
....Just do what you're told by the people who made the f'king thing...
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Lowest shown from my 12v panels in last 30 days is 18.79v max 27 days ago
 
wildebus said:
Can you find me a 12V Panel that has a 16V Open Circuit Voltage output please? I don't want buy it but I sure want to avoid it :D

Now with your "experience" you will of course be well aware that should you have one of these Unicorn brand Panels, you could not even use it with an MPPT controller from a popular brand such as Victron as that won't even turn on until the PV Voltage in is greater than 5V higher than the Battery.
(unless your use of Solar is such that you don't want to use it until the battery is below 11V? that would be a 'novel' approach ;) )


I suggest you try some sage advice you were given earlier ....
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So after all your bluster you're admitting that I was right. It won't turn on until the battery is connected. Makes no difference if the panel was on first.

As I said, most solar controllers are just buck converters, with no boost function.

The 5v margin is news to me. Certainly none of my MPPT controllers need that. Maybe I should revise my opinion that Victron are good.
 
nabsim said:
Lowest shown from my 12v panels in last 30 days is 18.79v max 27 days ago
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I'm baffled by that. Does the sun never stop shining on where you are?
I suppose if they're fitted on an aircraft circling the equator. Otherwise, I dispute the accuracy of your claim.
 
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