We are using a 5KVA 230VAC Quattro on a marine vessel. Our vessel has a requirement for DC battery isolator switches to used at each battery bank.
The setup is we have our ‘House’ battery bank routed to a single large capacity isolation switch from 100mmsq cable (we are switching the DC high side only) - the output side of the isolation switch routes to a large capacity busbar.
Connected to the busbar is the Quattro DC cables and also the vessel DC loads.
We are also using an onboard Generator - connected to AC-IN-1 and we have shore AC power when available, routed to AC-IN-2.
There is a behaviour that we are seeing that we would like clarification on if possible please.
With the generator not running, so no AC-IN-1.
Shore power is connected on AC-IN-2.
All appears fine, AC power available - and the house battery bank gets charged correctly, the Quattro works through the bulk / absorb / float modes as is expected.
When it comes to the end of day - if the AC-IN-2 is still present at the point the House isolation switch is opened - the house DC loads continue to be ‘ON’ and the only source for DC in that state is the Quattro DC Power lines.
There is no longer a battery present, the Quattro presumably does not know this and continues to attempt charging something.
Q) Is there a way to stop this occurring or is this to be expected ?
The obvious answer is AC power off first, then the DC....
Q2) We do have a colour GX fitted, where the operator could manually request the Quattro switch OFF (first) - then switch off the house battery.
-If this would work - Would the Quattro need to be manually switched back ‘ON’ on the next power cycle ?
Incase anyone wonders, as is to be expected - if just AC-IN-2 is applied with the battery isolation switch in the OFF position we do not get this same behaviour / nothing happens within the Quattro until the DC Power is switched ON.
Thanks guys
Dave