Last week the Victron 75/15 mppt charge controller was tested for RFI. Unfortunately, the load port dumps an enormous amount of RFI on an HF receiver, while the receiver is powered by the 75/15 load port and charging with solar power. The next clip is a short video published on Instagram and YouTube showing one of the RFI tests.
Toroids arrived 21AUG2022, testing continued.
Testing the effectiveness of an FT240-31 toroid, in removing RFI from the @victron_energy 75/15 load port during solar charging.
Unfortunately, the clouds have rolled in, so this test will continue when the Sun returns.
Here’s what we’ve learned so far
- The noise is generated inside the controller.
- Adding a toroid on the PV input doesn’t help!
- Noise is introduced to the radio on the power cable.
- Changing the PV from portable to tower-mounted and grounded doesn’t help.
- Very little noise via antenna!
- The noise gets worse on lower bands.
- Noise increases with greater current.
- RFI stops when the battery is fully charged.
- Without more than 7 amps current from the PV, RFI is difficult to detect on 17 meters or above.
Validate my tests
If you’d like to make your own tests with the same or similar Victron model, here are my testing perimeters.
- The radio is connected to the load port of the Victron.
- With the solar panel connected, be certain more than 5 amps are coming in from the solar panel
- With the radio connected to the load port, solar panel connected and charging, test 80m, 60m 40m, 30m, 20m, 17m, & 15 meters for RFI.
Some operators report no RFI when connecting their radios directly to the battery, without using the load port on the Victron. If others can validate, this is a good thing! The only problem is losing the built in logging statistics from the load pott as well as the incoming current from our Solar panels. If we don’t use the load port, we can’t get statistics on the incoming and outgoing energy directly from the Victron.
That’s all I’ve got for now guys. Please comment with your test results in the comments below.