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 <[email protected]> On Behalf Of Ken Hohhof Sent: Friday, January 24, 2020 12:06 PM To: 'AnimalFarm Microwave Users Group' <[email protected]> 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 <[email protected] <mailto:[email protected]> > On Behalf Of Josh Baird Sent: Friday, January 24, 2020 11:51 AM To: AFMUG <[email protected] <mailto:[email protected]> > 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?
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