Originally Posted by Andina Marie
Yandina Combiners do not chatter. They don't care which side the charge source is on.
But I have seen them "cycle" on and off a few times if fed to a smaller bank first. There is a difference between relay chatter and relay cycling and I find folks often confuse the terminology.
When trying to combine and charge a larger bank, that has been deeply discharged, the bank can sometimes suck the combine voltage down again, and with some systems it can't bring the house up fast enough and the relay disconnects or cycles off. After the delay time is met it cycles back on and may or may not remain latched this time and can sometimes cycle again.
When I have witnessed this cycling they were properly wired Yandina Combiners with the 3' (if my memory is that good) of 6GA wire suggested. These were the small black Yandina Combiner 150 style relays sold by West Marine
Due to this I much prefer the simplicity of feeding the house bank first, if it is a much larger bank. With both banks small it doesn't really matter. By feeding the house first when the bank comes up to combine voltage/time parameters, with the already nearly 99% charged start battery, and I don't get relay cycling and the relay simply remains closed.
The delays built into in the Yandina & Blue Sea relays prevent chatter. I can't say the same for the BEP combiner which apparently has no delay. The built in delays however don't always prevent the relay from cycling on/off a few times before remaining latched, when trying to charge a much larger bank.
Perhaps I missed something with the Yandina's, or did something wrong? Have the cut in/out voltages changed or the delay times changed? Are they cycle proof now too even when connected to a large bank..?
BTW I have a Combiner 150 that has an estimated 17,000 hours of charging/combining via solar
, shore charger and alternator. Busted it open and the contacts looked brand new and I would be hard pressed to tell it from new. Very good and reliable products...