Search found 25 matches

by mab
Wed May 27, 2009 2:20 am
Forum: Home Energy Area
Topic: Solar Calculator
Replies: 7
Views: 41072

solar calc

just another quick observation:- in resistance section you recommend wire size as 3.8mm thick.

That could be interpreted as diameter or mm squared - or am i just being picky?

mab
by mab
Wed May 27, 2009 2:13 am
Forum: Home Energy Area
Topic: Solar Calculator
Replies: 7
Views: 41072

solar calc

seems good - can you do one for wind gennys now please? :wink: one possible error (if I'm not mistaken):- in the panel positioning & installation section, report suggests panel should be mounted facing south at an angle of 14° from the horizontal for 12 months use, and 22° from horizontal ...
by mab
Sat May 02, 2009 4:50 pm
Forum: Home Energy Area
Topic: UPS battery voltage
Replies: 3
Views: 32481

UPS voltages

Thanks guys, may keep an eye out for one of the compaq units... That's sort of what I thought - as you say there's good reason they go for higher voltage battery packs at higher powers. The reason I want 24v is that that is my main battery voltage. I was wanting a larger inverter mostly 'cos it'll h...
by mab
Fri May 01, 2009 1:16 pm
Forum: Home Energy Area
Topic: UPS battery voltage
Replies: 3
Views: 32481

UPS battery voltage

I see from floydsters post that I'm not the first to use an old UPS as a cheap truesine inverter. :? I'm currently using a powerware 750va UPS as it uses a 24v battery (which matches my main battery bank), but would like a more powerfull inverter. I see from nino500's reply to floydsters post that A...
by mab
Tue Nov 25, 2008 11:49 pm
Forum: All things battery related
Topic: Maximum outdoor charging current?
Replies: 12
Views: 31024

wiring regs

The 17th edition wiring regs BS7671 say the following about the standard blue 16/32/64amp outdoor plugs/ sockets which are also used in marinas (like where I live on my boat in brighton):- They shall comply to BS EN 60309-1 above 63A and 60309-2 up to 63A. Protection to IP44, and require a 30mA RCD....
by mab
Sun Nov 16, 2008 12:39 am
Forum: All things battery related
Topic: more lead acid questions
Replies: 7
Views: 14855

chlorides

Does sound like they have got some internal shorting going on though. I thought that a shorted cell would give me 10ish volts? They were fast chrged to about 13.5v then slow charged (~1 amp) for a good 24hrs. during the last 12 hrs the voltage didn't seem to go up at all (stayed at about 13.4v). Hi...
by mab
Tue Nov 11, 2008 7:18 pm
Forum: All things battery related
Topic: more lead acid questions
Replies: 7
Views: 14855

batteries

Aha! thanks for that - I suppose then that my old traction batteries may not be so good for static use? They'll suffer from stratification for e.g.? I suppose then that ex-UPS batteries would be most suited to standing around as that's what they're designed for. That only leaves the question, are my...
by mab
Mon Nov 10, 2008 9:47 pm
Forum: All things battery related
Topic: more lead acid questions
Replies: 7
Views: 14855

yuasa website

I take back what I said about yuasa websites - I found some technical desctiption and the endurance batteries seem to be higher spec.

mab
by mab
Mon Nov 10, 2008 9:40 pm
Forum: All things battery related
Topic: more lead acid questions
Replies: 7
Views: 14855

more lead acid questions

Hi Folks, I've got a few random questions on lead acids (apologies if they've been asked before but my searches didn't show up the answers): 1/ In a prevoius post, JonSpence grouped lead acids into the following categories: Starting, Leisure, Semi-traction. Traction, Deep cycle, I understand the dif...
by mab
Fri Jun 27, 2008 11:51 am
Forum: Conversions
Topic: thinking about doing a conversion
Replies: 3
Views: 14075

conversion

Hi Chris, thanks for your reply. The motor's the question: what power do I need? ICE power rating is it's abs max output, so matching this would be overkill, but what power should I aim for for a vehicle of this size? (assuming the battery weight I specified previously) Then there's efficiency - is ...

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