In article , Ian
Stirling writes
tony sayer wrote:
In article , Ian
Stirling writes
tony sayer wrote:
In article , Mike
writes

"Ian Stirling" wrote in message
...

Any thoughts on the best products to use ?

Not really.
I haven't looked at appropriate products, due to being able to make do
with a BEST 600 UPS, fitted with 4 car batteries at a tenner each
from the scrapyard.

Searched for this on Google and only found links to the batteries used by
it.


If you want serious batteries for the purpose then have a search through
exidepower, they do the proper high capacity ones, not that cheap but
much better than car batteries.

Not at 10 quid per car battery, and less than that if I replace with an
equal mass of old battery.
(it's free money for the scrappy, the batteries are just shrink-wrapped
after being emptied, and sent off for recycling)

Suppose capacity and dependability aren't in the mindset

Pile of batteries, plus battery tester.
Two to three times the real need of batteries connected in series/parallel.
Occasional observation of balance under load.
Works for me.

(You can cause all sorts of problems with imbalanced battery packs, but
this is only two batteries in series, so it's not too terrible.
And the batteries being relatively slowly discarged is being much nicer
to them than in their former life where they are asked to provide 100A
surges.

Yes, but as these are from the "scrappie" won't they be shagged out
anyway?. Now your asking them to supply around 100-300 odd watts to keep
a freezer going?. Thats some 10 amps or so continuous load or
thereabouts?....
--
Tony Sayer