96v system

[Use.Bigger.Hammer]

Working backwards, the motors I’d like to use are 96v, so i build 96v batteries… I need recommendations for a good 96v high amp mppt2 solar charge controller. Then if I want to power 120v AC appliances will I then have to find a 96v inverter? If it does not exist, would installing two 48v inverters with the single charge controller work?
~Mark

 

[yabert]

I will follow this with interest because from what I know, you are screwed.
I mean, I also have a brushless motor who can work at 96V and deliver twice the power that at 48V... but I still plan a 48V battery because of available MPPT and inverters.

Well, 96V MPPT seem to exist and 96V to 12V DC-DC are available. So a system with a large 96V battery and a small 12V battery+12V inverter seem workable.

 

[yabert]

Any other member have experiment to share about this?
96V system is really attractive, but the lack of component for this voltage is discouraging.

 

[DIYrich]

Might be easier to build a 48v system, and use a 96v charger on a 96v battery.

 

[pollenface]

MakeSkyBlue 96v MPPT
CNSwipower 96vdc to 110-120vac inverter, look for ebay seller "blithechen" it's the official store for Xijiatec

no idea about BMS

would installing two 48v inverters with the single charge controller work?

work for what? what do you want to accomplish?

 

[DIYrich]

If it does not exist, would installing two 48v inverters with the single charge controller work?
~Mark

No. No guarantee that both inverters draw exactly the same.

 

[Use.Bigger.Hammer]

MakeSkyBlue 96v MPPT
CNSwipower 96vdc to 110-120vac inverter, look for ebay seller "blithechen" it's the official store for Xijiatec

no idea about BMS



work for what? what do you want to accomplish?

Might be easier to build a 48v system, and use a 96v charger on a 96v

I’m thinking to stick with large 96v packs, feed PV to two or more 96v SCC since I’m interested in prioritizing solar recharging at the highest current possible during peak sun events, my array being only ~5k. Them somehow take DC from storage to invert to AC ‘house’ loads with an offgrid PWM unit, since they like consistent voltage. Does this seem doable?

 

[wpns]

I’m thinking to stick with large 96v packs, feed PV to two or more 96v SCC since I’m interested in prioritizing solar recharging at the highest current possible during peak sun events, my array being only ~5k. Them somehow take DC from storage to invert to AC ‘house’ loads with an offgrid PWM unit, since they like consistent voltage. Does this seem doable?

What’s the input power of those motors?

 

[TommySr]

Any other member have experiment to share about this?

yabert, I have a 24V solar system that I use to charge my 48V golf cart,
I get the 48V for the golf cart by running 2 24V battery pack in series.

I charge the 24V batteries in parallel with the solar charge controller

I would think the same could be done with a 48V solar system to get 96V

 

[Use.Bigger.Hammer]

What’s the input power of those motors?

96v max current at full throttle 275amp. I just sent the maker Elco, a request for a power curve graph today.

 

[wpns]

A 5KW array and 26KW load might be a bit of a mismatch.

 

[yabert]

A 5KW array and 26KW load might be a bit of a mismatch.

No!
A 26 kW motor can output any power from 1 kW to 26 kW.
And since many boat need really low power to travel at low speed, I think this 5 kW solar is looking good.

 

[yabert]

the maker Elco...

What is the motor model and for what kind of boat?
All this is interesting as Elco also sell 48V motor.

 

[IGBT]

No!
A 26 kW motor can output any power from 1 kW to 26 kW.
And since many boat need really low power to travel at low speed, I think this 5 kW solar is looking good.

I would imagine if you run your 26kW motor at 3.5kW, which might be what your 5kW solar would give, you would travel at 4kts, giving you a free 30nm a day.

 

[cs1234]

yabert, I have a 24V solar system that I use to charge my 48V golf cart,
I get the 48V for the golf cart by running 2 24V battery pack in series.

I charge the 24V batteries in parallel with the solar charge controller

I would think the same could be done with a 48V solar system to get 96V

You have two 24v batteries connected in series for 48v, and you are charging both of them in parallel at 24v using a single mppt charge controller? Are you disconnecting them from 48v series when charging in parallel at 24v?

 

[TommySr]

you disconnecting them from 48v series when charging in parallel at 24v?

cs1234, yes I have circuit breakers on each pack that limit the current draw, I trip them when charging.
my charge controller has it's own circuit breakers which lets me sleep at night.
and because I have a 400AH 24v home battery pack on the same charging system I use one of these(image below).
lets me use my golf cart battery pack with my home system during winter months when the extra storage
comes in handy

 

[yabert]

you would travel at 4kts...

This can greatly vary in function of the boat.

But a point I remark when I play with boat speed calculator and power is if I reach 6 kts with 5 kW, I will only reach 7.5 kts with 4 time the power (20 kW).
So 20% speed improvement, for a 400% increase in power.

 

[IGBT]

This can greatly vary in function of the boat.

But a point I remark when I play with boat speed calculator and power is if I reach 6 kts with 5 kW, I will only reach 7.5 kts with 4 time the power (20 kW).
So 20% speed improvement, for a 400% increase in power.

Indeed, although a longer larger boat has a higher hull speed (talking displacement hulls here).

Our 17 foot sailboat has a hull speed of only 5.2kts. This means if we put a 400hp Mercury gas outboard on it, we would not go much more than that speed at full throttle. Well, we would sink first from being driven under the bow wave.

As a point of reference, in a recent trip on our 17 foot sailboat with a 6kw electric motor, we ran it at 500 watts for 6.5 hours and went 24nm. Doubling the wattage would have done the trip in about 5.5 hours.

 

[Suijkerbuijk]

What for brand .
My self looking for a hybrid systeem.

So i have look in to this systeem
So i can use the diesel engine to make power and charge the battery with it
But the systeem is on 48 volt .

This is the model my self looking for.

You can select Translate by Google Chrome if the website do not support it.

Hybride aandrijving voor boten kopen? - Drinkwaard Marine

Vind hier Hybride aandrijving voor boten! Drinkwaard Marine is de specialist in pleziervaart. Uitgebreid assortiment. Meer dan 60 jaar ervaring. 20 vakmensen. Bekijk nu!

www.drinkwaard.com

And full electric

Elektromotoren voor boten - Drinkwaard Marine

Vaar 100% elektrische of hybride met deze elektromotor van WaterWorld. | Drinkwaard Marine | Uitgebreid assortiment | Meer dan 55 jaar ervaring | 20 vakmensen | Bekijk nu!

www.drinkwaard.com

And than

Rudder Drive kopen? - Drinkwaard Marine

Vind hier Rudder Drive! Drinkwaard Marine is de specialist in pleziervaart. Uitgebreid assortiment. Meer dan 60 jaar ervaring. 20 vakmensen. Bekijk nu!

www.drinkwaard.com

Or

Other hybride systeem
See by. FNM BLUE HYBRID SYSTEEM engine

Scheepsmotor kopen? – Drinkwaard: Specialist in scheepsmotoren

Ruim assortiment scheepsmotoren te koop van 16 t/m 400pk voor pleziervaart en kleine beroepsvaart. Drinkwaard Marine is de specialist Scheepsmotoren. Doe uw aanvraag of bestel direct.

www.drinkwaard.com

You can always contact them its do sell to other country.

 

[GreenTechPros]

I did a 96V 3-phase off grid system for a small cheese factory in an off-grid Mennonite village in 2018. I had a Chinese company supply the 200V charge controllers and 30KW 208V 3-ph LF inverter. Still working strong to this day. If you're serious about the project, there are companies who will supply these components, but it will be risky from a warrant/support perspective.

 

[Skypower]

I might be missing something but I haven’t been able to find a prop recommendations for a given size Elco outboard. It seems like one size fits all? It would be nice to know what spine and hub size it is to dial in the optimal propeller for application. It matters even if it’s electric or combustion powered. If you’re pushing a sailboat or an aluminum boat the efficiency improvements with the right propeller would be huge.

 

[IGBT]

How loud are the Elco motors? It is nice having the brushless motor up top if you get a leak at the prop, but isn't that going to be quite loud compared to having the motor down underwater (and being cooled by said water). At 500 watts on our ePropulsion Navy 6 kw outboard, I had to keep checking to see if it was even running it was so quiet.

 

[Suijkerbuijk]

I might be missing something but I haven’t been able to find a prop recommendations for a given size Elco outboard. It seems like one size fits all? It would be nice to know what spine and hub size it is to dial in the optimal propeller for application. It matters even if it’s electric or combustion powered. If you’re pushing a sailboat or an aluminum boat the efficiency improvements with the right propeller would be huge. View attachment 226495

In the boat world you test it .
If the engine normal do not the max rpm .
It means to big propeller .
If the engine go over rpm it means to small propeller.

So you swap out .
Electric or fuel all come with a standard propeller .
So you test it .

I think by a electric engine you gone see the ampère it pull vs rpm it Run.

 

[IGBT]

In general for the maximum efficiency of a prop on a big heavy displacement hull, you want as large a diameter as possible spun very slow. Like if you could spin a 3 foot diameter prop at 50 rpm, it would be extremely efficient. This is not practical of course, but having a decently large low pitch prop spinning at 1200 rpm is going to be more efficient at slow speeds than a smaller high pitch prop.

 

[Skypower]

In the boat world you test it .
If the engine normal do not the max rpm .
It means to big propeller .
If the engine go over rpm it means to small propeller.

So you swap out .
Electric or fuel all come with a standard propeller .
So you test it .

I think by a electric engine you gone see the ampère it pull vs rpm it Run.

Exactly, but swap it out with what? Is there comparable manufacture’s prop that fits? There are on line calculators that you input data that gets you very close, if not good enough. Perhaps a prop Manufacturer like Solas should be jumping on this. I’ve had excellent success with those on Suzuki, Yamaha and Mercury outboards. That being said, I’ve probably bought at least two props for each application before being satisfied with performance. Some manufacturers offer a limited exchange program. That’s freaking smart and awesome! I probably should get busy on eBay, I have at least 7 props for engines I don’t have anymore and don’t plan on ever getting.