Identify old battery charger?

[colind3782]

Can anyone identify this old battery charger which is fitted to my boat? It works fine at the moment but I would like to source a manual. I would also be interested in a recommended modern equivalent if the time comes to change it. I have 4 x 75 ah LA batteries.
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[Alex_Blackwood]

Can anyone identify this old battery charger which is fitted to my boat? It works fine at the moment but I would like to source a manual. I would also be interested in a recommended modern equivalent if the time comes to change it. I have 4 x 75 ah LA batteries.
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Can't help I am afraid but found this:-
MASS ENERGY LIMITED overview - Find and update company information - GOV.UK

 

[Refueler]

I may be wrong - but I seem to recall these became the basis of the Mastervolt 12/25 series ...

I think you'll be very lucky to find any literature for this now ...

 

[pmagowan]

Have you tried any maritime museums?

 

[colind3782]

Have you tried any maritime museums?

Harsh, but fair!

 

[Alex_Blackwood]

I may be wrong - but I seem to recall these became the basis of the Mastervolt 12/25 series ...

I think you'll be very lucky to find any literature for this now ...

Mastervolt do a MASS 24/25. May be worth contac

Can anyone identify this old battery charger which is fitted to my boat? It works fine at the moment but I would like to source a manual. I would also be interested in a recommended modern equivalent if the time comes to change it. I have 4 x 75 ah LA batteries.
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It's working. Leave well alone Give it a coat of this:-

https://www.amazon.co.uk/Fridge-Coo...=appliance+paint+white&qid=1689756642&sr=8-10 https://www.amazon.co.uk/Fridge-Cooker-

 

[colind3782]

Mastervolt do a MASS 24/25. May be worth contac

It's working. Leave well alone Give it a coat of this:-

https://www.amazon.co.uk/Fridge-Coo...=appliance+paint+white&qid=1689756642&sr=8-10 https://www.amazon.co.uk/Fridge-Cooker-

I'm not planning to do anything with or to it, as long as it keeps working. However, it's old so it would be foolish not to have a plan in mind if it fails. Hence asking for recommendations for a replacement for my "current" battery set up, i.e. which of the Victron models?

 

[ROSK]

Hi
I searched a little and found some pictures of Mastervolt 12/25, it is obviously the same as yours. They even use the same phrase "Silent static technology"

boote-forum.de - Das Forum rund um Boote

Seems like Mastervolt was founded in 1991, so I guess yours is from that era. I would contact Mastervolt as the manual is not on their webpage.Even tried wayback machine, https://web.archive.org/web/20031008073800/http://www.mastervolt.com/download/index.asp

Looks like it is "only" 33 years old

 

[lustyd]

I'm not planning to do anything with or to it, as long as it keeps working. However, it's old so it would be foolish not to have a plan in mind if it fails. Hence asking for recommendations for a replacement for my "current" battery set up, i.e. which of the Victron models?

I thought this until my old (25 year old Cristec) charger broke and then I fitted a new one (Victron ip43). I went from 20p/day to 1p/day in electric charges at the marina. While this will take a while to pay for itself in electric alone, ~4 years, it’s likely my batteries will also last considerably longer as they’re no longer being abused quite so badly by a dumb charger trying to push energy into them 24x7. The locker is also cooler which feels like a good thing
Things don’t always have to be broken to justify an upgrade.

 

[ChromeDome]

I'd reassess your need insterad of just replacing 1:1.

 

[colind3782]

I thought this until my old (25 year old Cristec) charger broke and then I fitted a new one (Victron ip43). I went from 20p/day to 1p/day in electric charges at the marina. While this will take a while to pay for itself in electric alone, ~4 years, it’s likely my batteries will also last considerably longer as they’re no longer being abused quite so badly by a dumb charger trying to push energy into them 24x7. The locker is also cooler which feels like a good thing
Things don’t always have to be broken to justify an upgrade.

Electricity and water is included with our marina berth so I'm not too worried about that but I see your point about increased efficiency. It doesn't seem to damage the batteries though as they have only just been replaced after lasting at least since I bought the boat in 2011, which isn't bad!

 

[colind3782]

I'd reassess your need insterad of just replacing 1:1.

As per my OP, I have 4 x 75ah batteries and we're on shore power most of the time. Still interested in what would be an appropriate modern charger if I come to replace the old one.

 

[lustyd]

Still interested in what would be an appropriate modern charger if I come to replace the old one.

It's a 12V 25A model which is slightly undersized for your 300Ah bank depending on whose advice you listen to.

Mine is a Victron Phoenix IP43 1+1 30A which I bought to integrate with some other Victron gear. It's an easy swap and works well but this model is expensive for what it does.
The Blue Smart 30A would work for your scenario too and is cheaper.

If you also need an inverter you could consider one of the Multiplus units that do both but these are both more expensive and much larger physically.


Needless to say, any equivalent non-blue charger would work just as well

 

[Tranona]

This is the Victron IP22 range
12voltplanet.co.uk/victron-battery-chargers.html

If it is on all the time you really don't need 30A. You only need to draw high amps if the batteries are well discharged. The important thing is to set the float rate to match your batteries as this is where it will sit most of the time.

 

[colind3782]

This is the Victron IP22 range
12voltplanet.co.uk/victron-battery-chargers.html

If it is on all the time you really don't need 30A. You only need to draw high amps if the batteries are well discharged. The important thing is to set the float rate to match your batteries as this is where it will sit most of the time.

It looks like there is only about £10 difference between the 20A and the 30A. Might be worth it in case of future need?

 

[lustyd]

You only need to draw high amps if the batteries are well discharged

The 30A is to cover charging after trips and house loads while alongside and while charging, and is actually smaller than most guidance suggests for this use. While a smaller charger would do the job eventually, why not spec the proper size? The difference is only £30

 

[lustyd]

It looks like there is only about £10 difference between the 20A and the 30A. Might be worth it in case of future need?

You're comparing 20A 3 output to 30A 1 output but totally agree

 

[Tranona]

The 30A is to cover charging after trips and house loads while alongside and while charging, and is actually smaller than most guidance suggests for this use. While a smaller charger would do the job eventually, why not spec the proper size? The difference is only £30

I know, Was not suggesting a 20A just pointing out when the full output might be of value. He does say it is permanently connected to shorepower when he is not using it. Up to OP to decide if that matches his needs. BTW with a fully charged bank even running a lot of domestics is unlikely to need (or be able to absorb) the full 30A,

 

[lustyd]

BTW with a fully charged bank even running a lot of domestics is unlikely to need (or be able to absorb) the full 30A,

Yes, that's the point of speccing it!

 

[ChromeDome]

I wanted an independent charge of three banks, with separate reporting in an app.

3 x Victron IP 67 was the answer.