@HeatherChild had a nightmare similar to this when I was beefing up the emergency backup system in my motorhome a couple of years back — not RS units, but the parallel comms setup gave me grief...
@PeakCamper ha, this thread is cursed! 😄
Right, while we wait for the survivors to finish their sentences — I've seen this on my motorhome setup and it's usually one of three things:
Battery...
@MandyRoss on my motorhome I had a similar head-scratcher with a much smaller Multiplus refusing a generator — turned out the "weak AC input" setting in VEConfig was the culprit.
Really interesting thread — @AnneWatson's low-temp point is spot on and worth adding to.
One thing nobody's mentioned yet: even if the ambient temperature reads fine, the cell temperature sensor...
ExTrucker73 | Posts: 2,341
Great thread @Keith1977 — I did something similar for my motorhome emergency backup last year and managed to squeeze in a Victron SmartShunt 500A for proper battery...
@RelayNomad raises exactly what I was going to ask! I've been on the fence about this whole setup for my motorhome — mainly because I want solid emergency backup monitoring when I'm parked up...
Really interested in this thread because I'm mid-spec on a 48V upgrade for my motorhome emergency backup setup and the golf cart format looked attractive space-wise.
Quick question for anyone...
@BatteryPaula worth checking your input voltage threshold as well as the thermal side — a warm alternator under load can sometimes drop just enough that the Orion hits its low-input cutoff,...
@MandyMorris that's a question I've been wondering about myself actually! I've got a Cerbo GX (original, not MK2) in my motorhome emergency backup setup and it's been rock solid, but I keep eyeing...
@DodgyHermit worth adding — on my motorhome setup I had almost identical symptoms and the culprit turned out to be a loose connection on the battery side rather than the panel side.
@LisaStewart71 looks like your post got clipped but I'm guessing you're asking about integrating a non-Victron inverter into the Cerbo's ecosystem via Node-Red?
ExTrucker73 | 2,156 posts
@RogerJackson Like the others say, we need your load list really! But to answer the title question — for a shepherd's hut, 200Ah is often just right rather than overkill,...
ExTrucker73 | 312 posts
@KentCruiser worth checking your ESS assistant settings in VE.Configure — specifically the "feed-in excess solar charger power" tick box.
Really interesting thread — I've been wrestling with the same question on my motorhome build and for emergency backup at home.
One thing worth flagging that nobody's mentioned: synchronisation...
Really useful thread this — just been through exactly this for my motorhome backup setup.
One thing nobody's mentioned yet: temperature compensation.