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-------- Forwarded Message --------
Subject: Re: FE1012U or FE1024U
Date: Fri, 7 Dec 2007 11:23:28 +0000
From: James Wright james @futurenergy.co.uk
To: Roger Lovejoy
CC: Sandra Shirley sandra @futurenergy.co.uk
What you are saying is correct but we have never tested this and therefore have no data. One thing to bear in mind however is that running higher voltage PMG on a lower voltage will reduce the available output power. The PMG's are available separately in 12, 24 and 48 Volt versions. Unfortunately the studs cannot be removed without voiding the warranty on the PMG.
I don't know if you have already seen this on our FAQ's page :-
Q: Would your Permanent Magnet Generators be suitable for a bicycle power generator? At a cadence of 100 and a gearing ratio of 52:11 I can generate about 473 RPMs but I think I can only sustain about 200 watts for a reasonable period of time. I'm looking to put in a solar and wind power plant with an additional bicycle charger, to run lighting and small appliances. This type of generator seems ideally suited but I'm wondering if you have a smaller version?
A: In reply to the question, the answer is yes. The potential buyer hasn't indicated what voltage of batteries he intends to use the generators to charge. If it's 24V then he would only require a 52:20 ratio to get the 200W output or so he desires. It would be easy to change the ratio to suit the desired output power requirements. It's not practical to expect to use a 'person' powered generator to produce any more than 100W or so. Even a pro' cyclist could only produce 400W peak power for a short burst, so he is being practical in his calculations. Any of the 4 PMG's would be an ideal generator for this type of application, as it has a large 'flywheel' effect when in use, which would feel smoother than a smaller generator, which may be very difficult to obtain.
Hope this is of use.
On 7 Dec 2007, at 00:23, Roger Lovejoy wrote:
I can't quite remember the lady I spoke to yesterday **** Shirley, she gave me your email address.
I am thinking of using a 24 volt version to charge a 12v system a) as I thought it may produce 12v at a lower rev/min than the 12v as I would like to run it from a pedal/cycle system.
1 pedal a second with 4:1 gearing so 240 revs/ min.
Plus the 24 does seem to produce more power at high speeds, how's that?
Do you have data on the voltage produced for the models rather than the cut in speeds.
I notice you sell the PMG separately but don't say which or if you sell 12 and 24 versions etc.
and finally as I want to fit a 12 tooth cog.gear, is there a simple way of removing the 5 studs, rather than it the cog outside the studs which will increase the bending effect on the axle.
FE1012U 12V Turbine Spec + Power Curve
FE1024U 24V Turbine Spec + Power Curve
Weight 32 kg 70.5lbs
Length 25.9 cm 10.19″
Width 18.1 cm 7.13″
Height Inc. Term. 29 cm 11.4″
@ 100 Hour Rate 320 AH
@ 20 Hour Rate 250 AH 12.5 A
http://www.windandsun.co.uk/products/Batteries/Lead-Acid-Batteries/Rolls-Batteries#6001 £157.09 + VAT = £188.41
30th April : ML V=12.64 Y=230Wh
29th April : ML V=12.67⇖Y=240Wh
28th April : ML V=12.55⇖Y=150Wh ML is low as inverter was on till dusk: Yield is low as a dull day: Electrolyte OK ✓
27th April : ML V=12.78⇖Y=220Wh
26th April : ML V=12.64⇖Y=590Wh ML 12.64 and Higher at 12.67 P F
25th April : ML V=12.69⇖Y=640Wh ML 12.69 and Higher at 12.71 F
24th April : ML V=12.71⇖Y=470Wh ML 12.71 and Higher at 12.74 P F
23rd April : ML V=12.73⇖Y=450Wh ML 12.73 and Lower at 12.68 F
22nd April ML V=12.81⇖Y=550Wh ML 12.81 and Lower at 12.79 P F
21st April : ML V=12.71⇖Y=410Wh There was a high of 12.72 during the night ？ F
20th April : ML V=12.81⇖Y=880Wh ML 12.81 and Lower at 12.78 There was a high of 12.82 during the night ？ F
19th April : ML V=12.55⇖Y=640Wh ML 12.55 and Lower at 12.53 P F
ML of 12.55 is due, probably, to using power tools late in the day and battery didn't get enough charge.
18th April : ML V=12.63⇖Y=470Wh ML 12.63 and Lower at 12.60 P F
17th April : ML V=12.78⇖Y=310Wh ML 12.78 and Lower at 12.74 P F
16th April : ML V=12.70⇖Y=490Wh ML 12.70 and Lower at 12.67 F
15th April : ML V=12.60⇖Y=760Wh Given the low usage of 90w I am surprised the ML is as low as 12.60 given other evenings where the use has been higher yet with an ML over 12.7 &nbps;P F
14th April : ML V=12.64⇖Y=130Wh Given the low usage of 60w I am surprised the ML is as low as 12.64 given other evenings where the use has been higher yet with an Ml over 12.7 So maybe the switch to ABS and FT are too soon ? Y little daytime use so battery charged early.
13th April : ML V=12.55⇖Y=90Wh ML left computer on charge overnight. Y no daytime use so battery charged.
12th April : ML V=12.75⇖Y=420Wh F ML 12.75 and Lower at 12.73 ？
11th April : ML V=12.67⇖Y=510Wh P ML 12.70 and Lower at 12.66 ？
10th April : ML V=12.70⇖Y=240Wh P ML 12.70 and Lower at 12.67 ？
9th April ::: ML V=12.79⇖Y=240Wh P ML 12.79 and Higher at 12.82 ？
8th April ::: ML V=12.76⇖Y=130Wh ML 12.76 and Higher at 12.78 whilst actual voltage at 05:20 was 12.77 Much warmer this morning.？
7th April ::: ML V=12.71⇖Y=370Wh ML 12.71 and Higher at 12.75 ？ Y=370 ⇛ used Power Tools [PWT]
6th April ::: ML V=12.79⇖Y=270Wh ML 12.79 and Higher at 12.82 ？
？ The above noted anomalies may be due to a drop in temperature overnight of about 20°C ？
5th April ::: ML V=12.56⇖Y=450Wh ML left computer charging over night ! Y Used electric plane.
4th April ::: ML V=12.67⇖Y=260Wh
3rd April ::: ML V=12.68⇖Y=280Wh
2nd April :: ML V=12.63⇖Y=230Wh
1st April ::: ML V=12.67⇖Y=230Wh
£189.99 Including VAT & Standard Delivery
Not maintenace free ??
Weight 60Kg ??
Amp Hr date 235 ?? 20 or 100
I've had contact with Wind and Sun from the late 80's when I first researched suppliers for a wind generator and solar panels. The panels eventually came direct from BP and have lasted well except for physical damage. So I felt it was time to honour the contact when |I wanted a new setup. All the current one is from them (solar panels and cables, batteries and controllers) I hate to call the Victron Blue Solar MPPT a charger as it falls far short being based on the vagrancies of sunlight. More on that on the Victron critique.