0
\$\begingroup\$

I have a project for monitoring a PV Solar Panel of 100 W, Voc 22.0 V, Isc 6.14 A.

It should be autonomous so I bought a LilyGO-T-SIM7000G that is basically a ESP32 with 4G, supports a battery and also can be charge with a PV too, or at least supplying 4~6 V to the SOLAR_IN pin.

I measure the Vsc and Isc with an INA226, and with a buck converter I reduce the voltage to the mentioned pin.

My problem is that I need to separate the charge of the battery (the buck converter) in order to make my measurements, and also to measure current shortcircuit the PV + and PV - with the INA226 in between

I currently have this relays, no-name relays from an Amazon-hosted shop.

The thing is that this relays requires 120 mA to work, or at least the relay, and the system cannot provide that current so the voltage drops and the relay doesn't have enough energy to work.

What can I do? Should I use MOSFETs instead?

\$\endgroup\$
2
  • 1
    \$\begingroup\$ Yes, you could use MOSFETs or Solid State Relays instead. \$\endgroup\$ Commented Jul 20 at 14:38
  • 2
    \$\begingroup\$ Adding a circuit diagram is a very good idea. Where is the relay power from? You obviously have enough energy to drive the relay so HOW you are doing it matters. Without a diagram there are too manyt possibilities of what you are doing. \$\endgroup\$ Commented Jul 20 at 15:26

0

Reset to default

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.