Guru
Joined: 13/10/2014
Location: AustraliaPosts: 2232
| Posted: 01:17am 21 Jan 2024 |
That's a real pain, must have been some serious wind there, thankfully you took the right steps to protect the Solar.
I've gone as far as I can removing HF noise, there is only so much you can do. That 60,000uf bank I'm testing is obviously not going to have any effect on HF (RF) noise.
I just needed to dampen some very small low frequency ripple/noise pulses on the DC line. The line disturbance is caused, in part, by the way I'm disconnecting Solar charge to each battery bank, along with Inverter-Fridge Freezers, Inverter-AirCon and pulse ramping loads. These can run for extended periods of time, as in hours. This mix of small ripple harmonics and pulses are exasperated by the way I'm testing the LFP charging cycle control.
If I were doing it correctly based on low charging current cutoff point of a % of C for X charge voltage, there would not be the sudden voltage steps caused by Solar charge disconnect to the batteries under a higher charge current cutoff. The sudden pulses upset the crude setup I'm testing with. The Cap bank has almost eliminated that entirely. It doesn't really cause any issues, but I know it's there and it annoys me.
Unfortunately the only way to reduce power (current) output in these solar regulators is to reduce solar input. As you know, typically you match the MAX solar array input Power to a margin below the solar regulator peak rating, allowing for worst case OC voltage /power limits.
These units are simply 60A max rated output, obviously allowing them to produce more will likely cause a sparkle.
BTW I don't connect the solar charges directly to the batteries any more, the solar is connected straight to the Junction of the Inverter DC cables and the switched battery bank output cables, this junction is where the 60,000uF bank sits.
One solar charger can be switched across to any isolated battery bank for isolated charging if needed.
You are correct, the 4th bank will mostly eliminate the problem for now, so will setting it up correctly once the testing and rewire is finished.
Hope you don't get another storm, last thing you need, see Monday might be even hotter then today.
