Solis rai-3k-48es-5g are critical loads permanently live
- Thread starter gustaff
- Start date
I don't have that inverter, but I had the RHI-3K-48ES which was replaced with a S5-EH1P3K-L, and the Backup port is live as long as the inverter has battery power. In normal use it is linked directly to the main Grid connection. When grid fails it switches over to inverter output only. which can take a second or two, so you will get a brief loss of power.
Is that via a transfer switch, Or is it the inverter doing the switching?
Solar Guppy
Red Cobra Guppy
If it is enabled, it is live with either grid or by the battery backup feature if the grid is not present as long as the battery is not drained completely.
The inverter is doing the switching.
You should also make sure the backup circuit has a good earth too, ideally fitting an earth rod for it.
Is this loss of power your actual experience? I ask because that shouldn't be the case. There shouldn't be a loss of power. In the countless occurrences of loss of grid just this year where I stay, my Solis just transfers seamlessly with no loss of power.
Interestingly on the Solis website tech spec (for the RHI) Ginlong say..
"Back-up switch time: <20 ms". So not quite seamless, but good enough for most users.
Having said that, the Solis website tech spec (for the RHI) also says "Fanless design, long lifespan", but we know it has fans in it!
So who knows
Another weird anomaly - I've never heard the fans on my RHI come on - not ever. Under max load or not. Wonder if they're all created equal ?Interestingly on the Solis website tech spec (for the RHI) Ginlong say..
"Back-up switch time: <20 ms". So not quite seamless, but good enough for most users.
Having said that, the Solis website tech spec (for the RHI) also says "Fanless design, long lifespan", but we know it has fans in it!
So who knows
But i do have an external fan mod - so maybe that's preventing the internal from kicking in due to temps. don't know.
My fans only come on when there is large charge or discharge to the battery; i.e. around 50A or more. I believe it will be temp related as I recall @peufeu did a mod on his to get the fans to kick in as soon as the load was detected, rather than waiting for the inverter's electronics to heat up.
see:
https://diysolarforum.com/threads/solis-s5-various-issues.52383/post-721786
and pic of fans...
https://diysolarforum.com/threads/solis-s5-various-issues.52383/post-701949
see:
https://diysolarforum.com/threads/solis-s5-various-issues.52383/post-721786
and pic of fans...
https://diysolarforum.com/threads/solis-s5-various-issues.52383/post-701949
Yes
The internal fans aren't very effective as they just stir air inside the inverter, then the hot air inside has to exchange heat with outside air through the case itself. In fact it uses the whole case as a heat sink.
I'm using self reported inverter temperature to turn on an external fan.
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