Hi to all!
I have a Waeco battery charger 925-012TC at my boat.
It is a 220V charger for my 12V batteries.
This year I changed my battery connections:
I've a second battery charger at my 25XPB. It is a 120Ah for VW, Audi, Skoda etc.
I expect ~50Ah capacity, at my cruise speed of 2000rpms.
The original charger is a Mando 50Ah. (Until today, when it was connected to all batteries of 420A, it was really hot and unable to charge well)
I have 2*140wp rigid solar panels. And they give me 15A/h when the sun is good. And I guess a sum of 120A for 24hours) We have the original fridge + Indel-B 35Lt deep freeze. We do not cruise often at summer time. After 48 hours staying at a bay, max 2 hours of cruise. Almost every light is converted to LED.
I have 2*90Ah wet batteries for engine.
And 3*90Ah again wet batteries for house.
The total capacity is 540Ah. But my Waeco charger is max 300Ah.
And it has a capacity of max 25Ah (I think 12A+12A+1A - it has 3 output)
If the ideal formula for charging current for the batteries is : total battery capacity*10%/h
I need two types of 220V chargers :
For engine group : 18Ah
For house group : 27Ah.
But:
In general we DO NOT have enough time to charge the batteries via 220V. (Because we do not prefer to sleep with neigbours just 2 feet away at the port of restaurants)
I need and prefer a charging capacity of 25%/h charger.
Which means ;
For engine : 45Ah
For house : 67Ah
What should I do?
[quote=Molto Cattiva]
...
I've a second battery charger at my 25XPB. It is a 120Ah for VW, Audi, Skoda etc.
I expect ~50Ah capacity, at my cruise speed of 2000rpms.
The original charger is a Mando 50Ah. (Until today, when it was connected to all batteries of 420A, it was really hot and unable to charge well)
....
I have 2*90Ah wet batteries for engine.
And 3*90Ah again wet batteries for house.
....
[/quote]
Ozkan:
I'm certainly not expert in this subject (and I suspect that given most of the members of this organization are in North America, where the standard voltage is 110, not 220, there may be a smaller knowledge base on 220v chargers here), but a couple of thoughts.
First, not sure why you have 2 batteries for your engine. Since the engine should only need to draw on that for starting, and that drain can be quickly replaced once the engine is running, it would seem to make more sense to move one of those batteries to the house bank
Secondly, I'm assuming what you mean by "second battery charger at my 25XPB" you are speaking about the alternator. On the subject of alternators, chargers,and other things in this realm, I commend you to some of the articles on Mainesail's webpage, such as:
http://www.pbase.com/mainecruising/installing_a_marine_battery_charger
http://www.pbase.com/mainecruising/automotive_alternators_vs_deep_cycle_batteries
http://www.pbase.com/mainecruising/electromaax_kit
I've always found his advice to be extremely helpful and reliable (and I'm not alone here in that!).
[quote=Molto Cattiva]
... If the ideal formula for charging current for the batteries is : total battery capacity*10%/h
I need two types of 220V chargers :
For engine group : 18Ah
For house group : 27Ah.
...
I need and prefer a charging capacity of 25%/h charger.
Which means ;
For engine : 45Ah
For house : 67Ah
[/quote]
Don't think you need 2 chargers. We installed the Sterling Pro-charge Ultra, which separately charges both battery banks (it can handle 3 separate banks), and are quite pleased with it. Specs are at
https://cdn.shopify.com/s/files/1/0658/7343/files/PCU_e978504d-63c0-4a7c-b13a-0f478876cfc5.pdf?706 , its available in various amp capacity (all the way up to 60 amps), and suitable for 220v applications. Europe distributor is at http://sterling-power.com/products/pro-charge-ultra
Matthew Chachère
s/v ¡Que Chévere!
(Formerly 1985 C36 MKI #466 tall rig fin keel M25)
2006 Catalina Morgan 440 #30.
Homeported in eastern Long Island, NY