two altenators 1 mbss-gctid349699

[Guest]

i have a 1977 bayliner 3050 encounter twin year 2000 mercruser 350,s

my question is can i run them on the mbss sitch on " all " the engines both have altenators

right now i have two mbss switches and will be changing to 1 mbss switch.is there any problem

with both alenators feeding the whole battery bank at the same time ?

thanks in advance !!

[2850Bounty]

Remember that MBSS = main battery selector switch.

This means that it selects from two sources (#1 start bank & #2 House Bank) and will offer one output ("common" terminal) only.

A single MBSS w/ twins means that it will be powering both engines simultaneously and that there'll be no separation regarding which engine would powered up regardless of MBSS position.

The only separation would be between the starting bank and the HLBB ( house load battery bank).

If you're ok with both engines using one MBSS, I suppose it would be fine.

I don't think that there's an issue with the two alternators!

.

[boatworkfl]

I using only 1 switch it should be the type that has #1 or #2 or all/both.

http://www.google.com/products/catalog?hl=en&cp=16&gs_id=1l&xhr=t&q=battery+switch+perko&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1600&bih=748&wrapid=tljp1328291795174036&um=1&ie=UTF-8&tbm=shop&cid=13017199914066232111&sa=X&ei=4x8sT57yF4HAtgfcxsX3Dw&sqi=2&ved=0CH4Q8wIwBw

[2850Bounty]

boatworkfl wrote:
I using only 1 switch it should be the type that has #1 or #2 or all/both.

Unless something has changed, an MBSS is #1 or #2 or all/both and a Batt Switch is Off/On.

[boatworkfl]

2850Bounty wrote:
Unless something has changed, an MBSS is #1 or #2 or all/both and a Batt Switch is Off/On.

I forgot the on/off part, I am in the habit of using the term battery switch for a MBSS, not all boat owners do not know what a MBSS is.

[JimMc]

And I only have battery switches .. on and off

Not a MBSS. LikeTim Allen I rewired it.

[2850Bounty]

JimMc wrote:
And I only have battery switches .. on and off Not a MBSS. Like tim allen I rewired it.

Yes, but yours is more like a NASA Engineer designed it!

[JimMc]

Awe shucks Rick , your too kind.

If I was to do it all over there are a few things I might change / tweak but overall I am pleased.

BTW -

My twin engines each have there own starting battery.

I also have a Main House Bank consisting of Four 6V Golf Cart type batteries. Total capacity over 400Amp Hours.

As each engine's starting battery recharges which only takes minutes an Auto Charge Relay sends charge from that engines alternator to the House Battery Bank. Each engine has a Auto Charge Relay to send charge to the House Battery Bank. Within a few minutes of the engines running they are both feeding charge to the house bank.

This system has served us well.

The starting batteries only serve their associated engines needs.

Virtually all on board systems run from the House Battery Bank.

If I would need to I can transfer power remotely from the House Battery Bank to start either or both engines.

Here are those Auto Charge Relays. (Yes , I need to shorten some of the cables.)

[2850Bounty]

boatworkfl wrote:
I forgot the on/off part, I am in the habit of using the term battery switch for a MBSS, not all boat owners do not know what a MBSS is.

I know...... it makes sense that some systems do use an ON/OFF swtich, and others switch between multiple battery banks. I think that the MBSS abreviation began here on the BOC.

It is a "main", it deals with "batteries", it does "select" and it's a "switch", so it does seem fitting!

[SomeSailor]

2850Bounty wrote:
I know...... it makes sense that some systems do use an ON/OFF swtich, and others switch between multiple battery banks. I think that the MBSS abreviation began here on the BOC.

It is a "main", it deals with "batteries", it does "select" and it's a "switch", so it does seem fitting!

Actually... MBSS has been around a long time. You're just the first one to attempt to rename it and claim it.

Perko 8501DP Marine Battery Selector Switch



As far as two alternators... Here's what I have on mine:

https://"http://www.westmarine.com/b...el # 12032991)

[2850Bounty]

SomeSailor wrote:
1.... Actually... MBSS has been around a long time. You're just the first one to attempt to rename it and claim it.

2... Perko 8501DP Marine Battery Selector Switch

1... Are we back at it again?

2... As for the 90* sweep Perko shown, you guys should break one of these open sometime and look at the small contacts required to make one work within a 90* sweep.

I don't have the same issue with the full sweep Perkos, but they too use relatively small contacts.

IMO, if you want a good quality MBSS, look at the Blue Seas, Guest or Cole Hersee products.

I do like the BALMAR Max Charge Digital 12 Volt Regulator for Dual Alternators that you're using, Mike.... that does solve the issue for anyone concerned.

.

[SomeSailor]

I'm not back at anything... just saying that the term MBSS has always meant Marine Battery Selector Switch (1/2/Both/Off) to many of us. And before you go re-inventing electronics terms, a "switch" isn't just for "On / Off".

As far as the Perko... no emotional connection at all. Never had one fail in many years is all.

The Balmar regulator is great for systems that have high ouptut alternators alongside smaller ones. I have a Balmar 210A on my Stbd motor and an OEM 85A on the Port side motor. The regulator controls both.

[2850Bounty]

SomeSailor wrote:
I'm not back at anything... just saying that the term MBSS has always meant Marine Battery Selector Switch (1/2/Both/Off) to many of us. And before you go re-inventing electronics terms, a "switch" isn't just for "On / Off".

I don't disagree, Mike, I've pretty much always said MBSS = main battery selector switch, and BS = Battery Switch.

Both the BS and MBSS are switches, one simply performs the additional task of selecting between two sources.

Did you read a thread or two that implied that a BOC member was taking credit for the MBSS abreviation?

[SomeSailor]

2850Bounty wrote:
I don't disagree, Mike, I've pretty much always said MBSS = main battery selector switch, and BS = Battery Switch.

Both the BS and MBSS are switches, one simply performs the additional task of selecting between two sources.

Where did you read anything that implied that a BOC member was taking credit for the MBSS abreviation?

I think you're missing my point Rick... it's just MARINE not MAIN.

The credit portion probably came from:

2850Bounty wrote:
I think that the MBSS abreviation began here on the BOC.

[2850Bounty]

Ok, then I'm going to re-coin it MMBSS!

When I first joined, Mike, I don't recall anyone using "MBSS", but I do recall seeing "battery switch", "Perko", "1/All/2/OFF switch", "Battery Isolator Switch", etc.

Apparently the MBSS just seemed to evolve.

If we're going to split hairs over Marine -vs- Main, I gues the "M" leaves it open to each person's interpretation.

I'm good with that!

.