Septor 75 replacement

[Nina Lucia]

My Septor 75 doesn't seem to be charging my two domestic batteries, only engine one.

Looks like its original one fitted on our Aphrodite in early 2000 in Sweden, and now looks like its packed up.
Engine starter battery is always 13.4V and two domestic are only 12.2V.
We also have Solar Panel and Tystor that is looks like charging only domestic when we are connected on mains in marina occasionally ....

What should I use as replacement for Septor 75?

Can you recommend good boat electritian in Gosport/ Port Solent that can come to some good specifications to replace all this old parts?

Thanks

 

[BabaYaga]

Septor is a voltage sensitive relay (VSR).
If you are happy with this solution, replace with something similar.
Victron Cyrix is often recommended on here.
There are other options, though,

 

[Nina Lucia]

Thanks Baba Yaga!
I was thinking and heard about Victron, but I didn't know which one?
Victron Cyrix sounds like perfect replacement and straight forward, thank you. what other options are you suggest ?
I really appreciate, Thanks

Septor is a voltage sensitive relay (VSR).
If you are happy with this solution, replace with something similar.
Victron Cyrix is often recommended on here.
There are other options, though,

 

[BabaYaga]

You might consider a low loss splitter, such as Victron Argofet.
https://www.victronenergy.com/uploa...olators-with-alternator-energize-input-EN.pdf
Although a bit pricier, a more predictable way of splitting alternator output, in my view.
On my own boat I use a simple, heavy duty relay (non voltage sensing) controlled by D+/charging light signal. Simple and reliable.

 

[Nina Lucia]

I think Cyrix is more similar to what we have now, and direct swap, might be easier to replace. What model would you suggest, we have two domestic and one engine batteries, all 110Amp, our alternator is Volvo standard alternator 50A.
Thanks

You might consider a low loss splitter, such as Victron Argofet.
https://www.victronenergy.com/uploa...olators-with-alternator-energize-input-EN.pdf
Although a bit pricier, a more predictable way of splitting alternator output, in my view.
On my own boat I use a simple, heavy duty relay (non voltage sensing) controlled by D+/charging light signal. Simple and reliable.

 

[BabaYaga]

I imagine this one would do:
https://www.12voltplanet.co.uk/vict...sitive-relay-battery-combiner-1224v-120a.html

 

[Nina Lucia]

Thanks

I imagine this one would do:
https://www.12voltplanet.co.uk/vict...sitive-relay-battery-combiner-1224v-120a.html