Hydrogenerator

[areddon]

Somewhere (I think here) I came across a link to a hydrogenerator designed and manufactured by a german professor. It looked quite sleek in design of the unit and the mounting hardware . I cannot find the product or any link to it. Does anyone have any ideas?

[wiekeith]

Try https://sailnsea.1a-shops.eu

[Pete7]

Martin on M Jambo has a German Hydro generator, might be the same type?

Pete

https://www.youtube.com/watch?v=gfAf...channel=MJambo

[dhenline]

how electricity can one expect out of a hydrogenerator? if you sail for 24 hours?

[El Pinguino]

My Aqua4Aerogen produces a steady 5 amps at 5 knots - 24 hours a day

[StuM]

Originally Posted by El Pinguino

My Aqua4Aerogen produces a steady 5 amps at 5 knots - 24 hours a day

At what voltage?

[El Pinguino]

13.3V .

[wiekeith]

Originally Posted by dhenline

how electricity can one expect out of a hydrogenerator? if you sail for 24 hours?

Well, that depends on the model of hydrogenerator you're using and the speed you're sailing at (you'd need to look-up the manufacturer's claimed output vs speed). If, for example, you were sailing at a constant speed that produced 5A, then in theory you'd generate 5x24 which gives you 120 Amphours of power. It will also depend upon the state of charge of your batteries at the time.

[Pete7]

Originally Posted by dhenline

how electricity can one expect out of a hydrogenerator? if you sail for 24 hours?

In the linked video, Martin shows he is getting 5A into his 12v LFP batteries at 5 knots and 6.6A at 6.5 knots. It's a little expensive for what it produces, a 150w panel would produce similar figures. However, if you have maxed out solar its another option if it all goes pear shaped and probably keep an autopilot running on a 32ft yacht which I think he has.

There are others, but a lot more money.

Pete

[Na Mara]

Originally Posted by Pete7

In the linked video, Martin shows he is getting 5A into his 12v LFP batteries at 5 knots and 6.6A at 6.5 knots. It's a little expensive for what it produces, a 150w panel would produce similar figures. However, if you have maxed out solar its another option if it all goes pear shaped and probably keep an autopilot running on a 32ft yacht which I think he has.

There are others, but a lot more money.

Pete

A solar panel typically outputs about 5 times is wattage in watt hours a day so 150W panel is 0.75kWh a day. 6.6 A at 13 V over 24 hours is 2.1kWh or nearly 3 times as much from the hydrogenerator over the day. On your figures Pete a hydrogenerator is equivalent to 450W of solar. And this is underway when shading of solar is a real problem. They are an expensive way to produce power, particularly as we are only sailing 10-15% of the time, but if you are looking for power underway hydrogenerators are hard to beat on a kilowatthour per day basis. Fit two and even the most power hungry boat wont ever need to engine charge at sea.

[Pete7]

Originally Posted by Na Mara

A solar panel typically outputs about 5 times is wattage in watt hours a day so 150W panel is 0.75kWh a day. 6.6 A at 13 V over 24 hours is 2.1kWh or nearly 3 times as much from the hydrogenerator over the day. On your figures Pete a hydrogenerator is equivalent to 450W of solar. And this is underway when shading of solar is a real problem. They are an expensive way to produce power, particularly as we are only sailing 10-15% of the time, but if you are looking for power underway hydrogenerators are hard to beat on a kilowatthour per day basis. Fit two and even the most power hungry boat wont ever need to engine charge at sea.

Actually, solar is more like 4x in our experience and as alluded to in your solar thread by Hpeer and then in good sunny conditions, in heavy cloud and rain, nope. We can fool it to reach 4.6x and possibly 5x but only if you can keep the MPPT in absorption. The minute the batteries are fully charged and the MPPT drops to float, then its all over and the MPPT will only draw a tiny amount to meet the house needs.

The way around this if it's a regular occurrence is to do something useful with solar rather than allowing the MPPTs to spend hours in float. Hot water heating is one option, cooking is another so you have banked spare energy to save power being used later and being drawn from the batteries.

This our solution, though hot water heating is on the cards shortly.

Pete