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First panel I have bought, has the M4 connectors. It certainly charges my old car battery which runs a 3kw inverter... My meter is faulty so can't see any ampage, but it certainly works well for me.
bestens Just as it should be
The part does what it's supposed to. Comparably light. It is only flexible to a limited extent. Connection cables are very stiff. I haven't been able to test power yet. All in all, okay.