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I’ve got foldable dokio panels, I too had an issue at first charging my LB…I had the polarity around the wrong way…have u checked this?…I’ve had no issues since with Dokio
@bash. I checked for polarity issues and there was still only volts (ie. no amps or watts) being read by the multimeter. Just to be 100% sure, I even used another multimeter with the same result. As I said, I would have been sending the thing back anyway because of the very, very loose connectors.
So The first one was returned and another received. This time the SAE connector was tighter and the multimeter was telling me that there was 20V and 2.1W coming out of the panel which, if my sums are correct, is about 40W from what's supposed to be a 100W panel BUT that was in the midday sun obscured by a lot of cloud so probably OK. On the downside, my Jackery Explorer 1000 V2 still refused to take a charge from it so I'm assuming that there's a polarity issue with the wiring of the panel or connector so this one's going back as well.
 
So The first one was returned and another received. This time the SAE connector was tighter and the multimeter was telling me that there was 20V and 2.1W coming out of the panel which, if my sums are correct, is about 40W from what's supposed to be a 100W panel BUT that was in the midday sun obscured by a lot of cloud so probably OK. On the downside, my Jackery Explorer 1000 V2 still refused to take a charge from it so I'm assuming that there's a polarity issue with the wiring of the panel or connector so this one's going back as well.
For my Renogy panels I had to snip off the male and female connectors from the extension mc4 leads and put new ones on back to front. That sorted my polarity issue.
 
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