Andrew_Trayfoot
Active member
Any recomendation on a VSR?
@PaulRainbow what are you currently recmending?
@PaulRainbow what are you currently recmending?
Voltage Sensing Relay - Recomendations
- Thread starter Andrew_Trayfoot
- Start date
laika
Well-known member
I have a blue sea one which works well except for an annoying feature I discovered soon after leaving Alderney after a few days on a buoy. It won’t combine batteries if the voltage on one is too low. So when planning an installation do consider installing an emergency manual battery combiner to avoid the necessity of heavy duty cable gymnastics in bumpy weather
B27
Well-known member
That is arguably a very sensible feature, connecting a big flat house bank to your start battery may not be a good idea!
How flat is 'too flat' though?
richarddbarker
New member
Have a look at Victron Cyrix CT, it supports bidirectional connection and can be wired for start assist.
VicS
Well-known member
The under voltage lockout for BlueSea VSRs is 9.5 volts . . . . It's in the specs on their website
lustyd
Well-known member
I think a lot of them disconnect under engine start conditions anyway so you'd want the manual switch either way surely?
PaulRainbow
Well-known member
Victron Cyrix Andrew
laika
Well-known member
It is and I see the reason. But when your autopilot starts beeping low voltage at you and starting the engine doesn’t solve the problem, you wish you’d thought to install the manual link
B27
Well-known member
I think I'd rather avoid my house battery getting down below 10V.
Supertramp
Well-known member
Probably obvious, but fit a battery monitor to show the house and engine battery voltages. Invaluable for checking what's going on and monitoring charge state.
I recently had a charging problem and it gave me a lot of confidence from monitoring the battery voltages that I could start and run the engine for hours and that the house batteries would run the autopilot and navigation stuff. Possibly my most frequently used instrument!
I recently had a charging problem and it gave me a lot of confidence from monitoring the battery voltages that I could start and run the engine for hours and that the house batteries would run the autopilot and navigation stuff. Possibly my most frequently used instrument!
pmagowan
Well-known member
This is my solution which is with BEP but can be done with any DVSR, allows for isolation of each battery for engine start or house loads. Prevents issue with over discharged battery leading to non-functioning system. Is wired different to the BEP standard wiring. The shunt is there for monitoring.
Andrew_Trayfoot
Active member
There is another thread running on VSRs which is getting very technical (and slightly grumpy) so I'm going to keep off that one..
So some advice on wiring the VSR would be helpful...
My setup is as follows:
Boat lines on a mooring.
70a alternator (beta)
30w solar panel with 2 battery charge controller (engine battery priority)
Engine battery
Domestic battery 2x110ah
2kw inverter
Microwave (engine running while in use)
Cool box (wired via a relay to only run if the engine is on)
Currently 1:2:Both switch.
So how do I wire it so:
Cool box only runs with engine (curreny relay from key swich)
Solar panel does no confuse the VSR..
Inverter/microwave does not touch the engine battery. (Curreny the 1:2:both is set to domestic (1) only so what the alternator is not providing comes from that). Note it is only ever run for 6 or 8 minutes in 2 minutes blocks.
So some advice on wiring the VSR would be helpful...
My setup is as follows:
Boat lines on a mooring.
70a alternator (beta)
30w solar panel with 2 battery charge controller (engine battery priority)
Engine battery
Domestic battery 2x110ah
2kw inverter
Microwave (engine running while in use)
Cool box (wired via a relay to only run if the engine is on)
Currently 1:2:Both switch.
So how do I wire it so:
Cool box only runs with engine (curreny relay from key swich)
Solar panel does no confuse the VSR..
Inverter/microwave does not touch the engine battery. (Curreny the 1:2:both is set to domestic (1) only so what the alternator is not providing comes from that). Note it is only ever run for 6 or 8 minutes in 2 minutes blocks.
PaulRainbow
Well-known member
Or if you must keep the 1-2-B just connect the 1-2-B as above. You can leave the coolbox on the relay. The solar controller would be best connected to just one battery bank, probably better to use the domestic bank.
Andrew_Trayfoot
Active member
Thanks Paul
Or if you must keep the 1-2-B just connect the 1-2-B as above. You can leave the coolbox on the relay. The solar controller would be best connected to just one battery bank, probably better to use the domestic bank.
PaulRainbow
Well-known member
Should have been a schematic in post #13, for some reason the forum doesn't show images from a link !!
Andrew_Trayfoot
Active member
@PaulRainbow
Am I missing something or should there be a connection from the alternator to the VSR?
Am I missing something or should there be a connection from the alternator to the VSR?
Attachments
Andrew_Trayfoot
Active member
@PaulRainbow sorry, just looked at the Victron web site - undersand how it works now 