Search found 18 matches

by mab
Wed Feb 02, 2011 5:39 pm
Forum: All things battery related
Topic: Ex UPS lead acids
Replies: 4
Views: 5537

Re: Ex UPS lead acids

I'll keep looking then, although I've been looking on & off for a couple of months already - Just have to hope they come back.

Hmmm... if the price of lead is that high, I wonder what I can get for those junk batteries I've got lying around...

Thanks

mab
by mab
Tue Feb 01, 2011 4:12 pm
Forum: All things battery related
Topic: Ex UPS lead acids
Replies: 4
Views: 5537

Ex UPS lead acids

A couple of years ago I bought some ex-UPS Yuasa endurance AGM's for my home renewable energy system for a very reasonable price. They are excellent and still going strong. I'm now looking for some more to expand the system but cannot find any advertised in the obvious places (e.g. ebay). Have I jus...
by mab
Fri Apr 30, 2010 10:08 pm
Forum: Home Energy Area
Topic: 41.3p per kwh sell back
Replies: 36
Views: 47742

Re: 41.3p per kwh sell back

The cynic in me feels that this is a way for gov't to give money to people who are already relatively wealthy but not interested in the environment (i.e. they've got lots of roofspace, and spare cash lying around (like your average MP for e.g.)), whilst avoiding giving money to people who have alrea...
by mab
Wed Oct 21, 2009 8:14 pm
Forum: All things battery related
Topic: Battery Desulphating device
Replies: 9
Views: 8435

fair comments, but I have tried one of these (in fact I made my own version), but the question is: does it work better than a long slow charge - from my own tests - no, not really.

mab
by mab
Wed Oct 21, 2009 6:21 pm
Forum: All things battery related
Topic: Battery Desulphating device
Replies: 9
Views: 8435

Hi robbymax, It sounds to me that you may have 1 or more bad cells in that battery. I'm no expert, but i suggest that you leave that battery to rest for a couple of days after a long slow charge and see if it still copes with a load test. Assuming you're using them in parallel (connected for 12v), y...
by mab
Mon Jun 08, 2009 3:53 pm
Forum: Home Energy Area
Topic: Solar Calculator
Replies: 7
Views: 13068

Fair enough - I think I'd just find some other way to deal with the shortfall myself. It doesn't make sense to me to buy enough panels to supply all my power needs in December when for the other 11 months they'll be generating a surplus. But i expect you say that somewhere (I haven't read all your r...
by mab
Wed May 27, 2009 2:20 am
Forum: Home Energy Area
Topic: Solar Calculator
Replies: 7
Views: 13068

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: 13068

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: 10837

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: 10837

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...

Go to advanced search