Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E.R." Newsgroups: sci.electronics.design Subject: Re: Grand Apagon - Electricity (not) in Spain Date: Sat, 10 May 2025 16:04:28 +0200 Lines: 62 Message-ID: References: <6r0lelx0c8.ln2@Telcontar.valinor> <6cgh1k9mkuae63gn4dd8ej49o3au4m0l67@4ax.com> <1rbvfbs.10nr9w6pkdoawN%liz@poppyrecords.invalid.invalid> <8brrelxb35.ln2@Telcontar.valinor> <2pmuelx7qq.ln2@Telcontar.valinor> <1p71flx41d.ln2@Telcontar.valinor> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net PGAwXymDwCoPJ2ipBf5e+wZdZAt1zgAgoXDGVtgfALjN69ifoZ X-Orig-Path: Telcontar.valinor!not-for-mail Cancel-Lock: sha1:e04u95tOuIkEgq79poqoyQo2elU= sha256:AIFRSYyouf1MPi4RHTO269bTCPxXTUNsTM71dRd9GfI= User-Agent: Mozilla Thunderbird Content-Language: es-ES, en-CA In-Reply-To: On 2025-05-10 04:37, Don Y wrote: >> Yes, of course. Around here we have many flat roofed houses. Many of >> those use aluminum foil with asphalt. If well done, it could hold a pool. > > Sadly, organic debris accumulates on them.  Then, water gets trapped > in the debris -- and slowly rots the roof in that location.  Drainage > being important and hard to accomplish with low pitch. The intense sun dries it up soon :-) >>> I've tried a new configuration where I am hanging many of the >>> UPSs off a couple of larger units.  The thinking being that I >>> only have to maintain the larger units' batteries (and still >>> get the benefits of a UPS per workstation). >> >> Maybe just a big unit, and wiring around the place. Red coloured >> sockets. Lilke in computer centres. > > Wiring *in* the structure would necessitate an inspection. > But, plugging three UPSs (with long power cords) into a > single UPS is acceptable.  Then, the single UPS can > serve those three loads or any combination. Ah. > > ONE set of batteries to replace (let the other three "slaves" > complain that they are missing batteries... who cares?!) Why not remove those three UPS, and connect the loads direct to the main UPS? :-? > >>>>> Digikey used to have a policy of free shipping for prepaid (cash) >>>>> orders.  I would buy batteries in lots of 10 and send prepayment. >>>>> Shipping charges can be a significant fraction of a battery's >>>>> cost.  They now exclude batteries from this policy (when I last >>>>> checked). >>>> >>>> Right, they are very heavy. Yep, the place above charges 5.25€ for >>>> shipping. >>> >>> As I said, I try to rescue them (often I come across NiB UPSs >>> that some moron in IT ordered but opted not to install. >>> As the recycle value of batteries is just weight (regardless of >>> ability to hold a charge), I swap my dead batteries for such >>> new batteries and everyone is happy! >> >> :-D > > An SLA battery is worth about 22c/pound for its lead content. > So, *taking* viable batteries is effectively theft (though on > a very small scale).  Replacing them with an equivalent > weight of recyclable lead leave no grounds for objection: > "How better to RECYCLE this *good* battery than to return it > to service?!" Indeed :-) -- Cheers, Carlos.