I got some old Russian thermo electric generators that are self heating. They are pretty good for things like this. You will have to pick them up though, Sakhalin Island.
Best Regards, Chuck McCown McCown Technology Corporation 8401 N Commerce Dr Lake Point, Utah 84074 801-250-9503 Office 435-830-4306 Cell www.mccowntech.com www.microtrench.pro www.terabitnetworks.com From: Dennis Burgess Sent: Tuesday, August 15, 2023 2:36 PM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] battery nerd question You can use 9dot and do your power control, dc in on solar panels 48 volt system.. Just another option, lots of reporting and metering there.. Dennis Burgess, Mikrotik Certified Trainer MTCNA, MTCRE, MTCWE, MTCTCE, MTCINE, MTCSE, HE IPv6 Sage, Cambium ePMP Certified Author of "Learn RouterOS- Second Edition” Link Technologies, Inc -- Mikrotik & WISP Support Services Office: 314-735-0270 Website: http://www.linktechs.net Need to Automate MikroTik Backups: https://cloud.linktechs.net Create Wireless Coverage’s with www.towercoverage.com From: AF <af-boun...@af.afmug.com> On Behalf Of Josh Luthman Sent: Tuesday, August 15, 2023 11:36 AM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] battery nerd question OMG get meters. The panels and batteries will cost more up front and they won't last as long. Solar sucks here in Ohio, it's only going to be worse where you're at. On Tue, Aug 15, 2023 at 11:54 AM Steve Jones <st...@togservice.com> wrote: we have a dozen or so, but are looking at pole mount micropops (our own poles). We are losing a grain elevator site because they decommissioned the elevator and theres no real options for the customers in some of the areas. Im just trying to get to something we can get solar power with enough battery to last through overcast. So Im calculating per battery runtimes, then will look at number of batteries we would need to survive vs paying for a ROW meter vs losing the customers. Just have to get to the cost per customer to retain them and the benefit gained per pole On Tue, Aug 15, 2023 at 8:53 AM Brian Webster <i...@wirelessmapping.com> wrote: How many of the batteries do you have? Do you need any voltages other than the 48 volts? If you have 4 batteries and only need 48 volts then wire them in series and not have to deal with the converter. Thank you, Brian Webster From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of dmmoff...@gmail.com Sent: Tuesday, August 15, 2023 6:59 AM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] battery nerd question *You’re around C/30 which should be on the high end of capacity. Lower load usually means a little extra capacity out of the battery. I realized that sentence might have been ambiguous. From: dmmoff...@gmail.com <dmmoff...@gmail.com> Sent: Tuesday, August 15, 2023 6:56 AM To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> Subject: RE: [AFMUG] battery nerd question You can do the whole thing in Watts. 12V * 150ah = 1800 Watt-hours 1800Wh / 50W = 36 hours If they’re telling me 95% efficiency, I’d assume 50W out needs 53W in (50 / 0.95). There’s usually an efficiency curve for the device based on load and temperature so it wouldn’t be 95% in all circumstances. Your system should be drawing less than 5A off the battery, and if your multimeter has a 10A fuse like most do, then you could put the meter in line and actually measure the amperage before and after the converter. Then you’d know for sure. And the battery’s total capacity will have a curve based on C-rate so there’s some variability there too. Usually it lasts longer when you’re drawing lower amperage. You’re around C/30 which should be on the high end. Age and maintenance of the battery affect runtime as well. If I want 6 hours of runtime then I plan Ah for 12 hours runtime. When my batteries are halfway toasted I’m still getting useful life out of them. From: AF <af-boun...@af.afmug.com> On Behalf Of Steve Jones Sent: Monday, August 14, 2023 9:57 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: [AFMUG] battery nerd question Just trying to cipher runtimes I have on hand 150ah 12 volt batteries, so thats what id be looking to use. Excluding the conversion loss of a 12v to 48v step up converter is the math correct here? 12v 150ah=1800 watt hours 1800 watt hours at 48v = 37.5ah 50 watts of radio running 48v = 1.04 amps 37.5ah @ 1.04 amps = 32.77 hours runtime does a step up that claims 95% efficiency mean 95% of the watt hours? -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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