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Alistair Clark avatar image
Alistair Clark asked

SmartSolar MPPT 75/15 BT how can I set timer to be on in daylight

SmartSolar MPPT 75/15 how can I set timer to be on in daylight hours ie. opposite of the street light function. I'm powering a glider receiver on a mountain but don't want it to be powered on in the night

MPPT Controllers
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1 Answer
ripper avatar image
ripper answered ·

Use nighttime mode to drive a relay with available NC (normally closed) pins. If powered, it disconnects your receiver. I use Eltako for example ER12 001 UC. They have very low power consumption. I would go real relay and not electronic Solid State Relay because the latter has possibly drain voltage toward the output.

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