ehh... I don't really care if it takes a week to fully recharge the batteries. Long power outages aren't that common around here...
On Fri, Jan 24, 2020 at 12:55 PM Adam Moffett <dmmoff...@gmail.com> wrote: > I had a number of sites with the TSP-600 + BCM48A. If I recall correctly > from the docs, it would use any surplus wattage to charge the battery. > > So 600W - LoadW = chargingW. > > With a 200W load that could take 4x100ah batteries from dead to full in 12 > hours. I didn't think that was unreasonable charging time. > > I never had the 360W units. > > > On 1/24/2020 1:14 PM, Ken Hohhof wrote: > > Sorry, I got the acronyms wrong. I think I meant that at larger sites > we’re using the BCM, or TSP-BCM, or whatever it’s called. The one that > controls the power supply and powers the loads at the battery voltage. > > > > *From:* AF <af-boun...@af.afmug.com> <af-boun...@af.afmug.com> *On Behalf > Of *Ken Hohhof > *Sent:* Friday, January 24, 2020 12:06 PM > *To:* 'AnimalFarm Microwave Users Group' <af@af.afmug.com> > <af@af.afmug.com> > *Subject:* Re: [AFMUG] Smaller DC PSU/Charger combo > > > > I don’t think so. Or keeping mind that the BCMU is also providing a DC-DC > converter function when it is running on battery, you could look for a 12V > system and then a smallish 12-48 converter. > > > > Actually I would not run a 200 watt site off a BCMU or, for that matter, a > single 12V battery unless it’s a really big battery. The runtime off a > single battery won’t be very long, and the recharge time off the BCMU will > be even longer. I only use the BCMU at small sites like you describe > because the battery charging current is so low, it could take days to > recharge the batteries. If I need > 100 watts, I’m using the BMU. > > > > What size battery are you using, something like 100 Ah? One thought would > be to use 4 smaller batteries. I have a lot of sites with 4 x 22 Ah > batteries. They fit in the bottom of our 24x30x10 NEMA boxes, and I prefer > to series batteries rather than parallel. 4 x 22 Ah is roughly comparable > to 1 x 100 Ah. If you can’t fit 4 x 22 Ah, maybe 4 x 9 Ah. I think I have > at least one site with a BCMU and just a single 9 Ah battery, but I think > that site also has a whole farm generator and the battery backup is mainly > to cover the time for the generator to come online. > > > > > > *From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Josh Baird > *Sent:* Friday, January 24, 2020 11:51 AM > *To:* AFMUG <af@af.afmug.com> > *Subject:* [AFMUG] Smaller DC PSU/Charger combo > > > > For micropops, we typically use some a Traco TSP-BCMU360 paired with a > Meanwell SDR-240-48. This is great, but it's a bit overkill for some very > small micropops (1-2 AP, BH) that we are looking at deploying. I really > don't need ~220-240W that this configuration supplies. > > > > The challenge is that I don't want to use something like an AD-155C which > would require me to use 4 batteries 12V to get 48V. I like that the > BCMU360 can supply a 48V load with just a single 12V battery. > > > > So - do I have any options for a smaller (physical footprint and output > power) solution that requires just a single 12V battery that can supply a > 48V load? > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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