Re: [Equipment] Solar backup?
raytaylor posted : I would say 2x 12v 120AH deep cycle batteries in parallel will do the job. Add a "Float Charger" to keep them charged up and hook the rocket directly up to the 12v batteries. A float...
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lutful posted : said by raytaylor:Even better would be to use a solar controller (PWM not MPPT) and a laptop power supply - 19 voltsGreat idea! Chargers for 16V laptops are ideal fit for this...
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Re: [Equipment] Solar backup?
jlester posted : We Use a similar set up but use a Tycon 18v Power supply w/150W capacity. They are designed for long life operation with an MTBF exceeding 40,000 hours.Controller is a Morningstar...
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cfabe posted : What good will 1 week battery backup be if power outage has the cable network down? They do have pole-mounted battery backup usually but only a few hours, not weeks.
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treichhart posted : Chris what is it any good if the same node on fiber doesnt have an battery back up? Just remember fiber and cable are on the same node setup from what I was told.
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MatrixHDV posted : said by raytaylor:Even better would be to use a solar controller (PWM not MPPT) and a laptop power supply - 19 volts and able to output at least 5 amps. 120 watt one will do. FWIW we...
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MatrixHDV posted : said by lutful: Always check the datasheet and make sure it allows at least 20V input if you want to use more common 19V laptop chargers. :) The most common input range for 12 volts...
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cfabe posted : That would be a good question for your provider if you were considering fiber from a cable company.
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John Galt posted : said by treichhart:Well, you guys are complaining about me just having one rocket on battery back up; now you guys are complaining about having my cable modem/rocket/mk/bmu so make...
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LLigetfa posted : A chain is only as strong as its weakest link. I had a UPS but my upstream provider had none. After an outage, I complained and they added their AP to a UPS. On the next outage, my...
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MatrixHDV posted : said by LLigetfa:A chain is only as strong as its weakest link. I had a UPS but my upstream provider had none. After an outage, I complained and they added their AP to a UPS. On the...
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MatrixHDV posted : said by jlester:Battery is a 12 v 110 amp/Hr SLA(AGM) and will power the 1- NB5 & 1- NSM2 for 3 days and leave approx 50% charge on Battery. This is over sized but you can set it...
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jlester posted : And what do you think of that SS-20?Solid as a rock, never had one fail. Foam is for insulation, should be on all sides and the battery kept below 90 degrees f at all cost.
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John Galt posted : Elevated temperatures, overcharging and/or discharge beyond 30% will kill batteries at an alarming rate.
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lutful posted : said by MatrixHDV:said by lutful: Always check the datasheet and make sure it allows at least 20V input if you want to use more common 19V laptop chargers. :) The most common input...
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raytaylor posted : You are probably right. However i would still go for a 5amp+ power supply because the battery will suck alot of power after a long outage when recharging. This is why you cannot put...
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jcremin posted : said by raytaylor:the battery will suck alot of power after a long outage when recharging. That's also why I suggested the 15A charger/supply. I personally wouldn't charge a large deep...
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lutful posted : said by raytaylor:the battery will suck alot of power after a long outage when recharging. This is why you cannot put a large battery on a cheap 600VA UPS as you can overload the...
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MatrixHDV posted : said by lutful: The battery won't draw any more current than the charger can supply. :) While that's true an underrated charger can go up in smoke trying to bring up a dead battery...
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MatrixHDV posted : said by lutful:I actually wanted him to check the datasheet of the solar charge controller to make sure it accepts at least 20V input from solar panel ...A quick check of the specs...
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jcremin posted : said by MatrixHDV:just in case he wanted to use a 19V laptop charger.It is not relevant to this as the input of the laptop charger is 12 volts just like the battery to be charged. That...
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MatrixHDV posted : said by jcremin:Lutful is talking about using using a standard 120v to 19v laptop charger as the power supply to charge the battery and power the electronics. It sounds like you are...
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jcremin posted : said by MatrixHDV:said by jcremin:Lutful is talking about using using a standard 120v to 19v laptop charger as the power supply to charge the battery and power the electronics. It...
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MatrixHDV posted : said by jcremin:The laptop charger would plug into the 120V grid power, and the 19V DC output of the charger would hook to the charge controller where a solar panel or wind turbine...
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jcremin posted : said by MatrixHDV:said by jcremin:The laptop charger would plug into the 120V grid power, and the 19V DC output of the charger would hook to the charge controller where a solar panel...
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lutful posted : said by MatrixHDV:said by lutful: The battery won't draw any more current than the charger can supply. :) While that's true an underrated charger can go up in smoke trying to bring up a...
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Re: [Equipment] Solar backup?
lutful posted : said by treichhart:I need some kind of inverter that is tie in from solar/main power feed from house to battery then back out to the POE but I cant find what I am looking for. Can...
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MatrixHDV posted : said by lutful:Lead-acid battery internal resistance goes UP as it discharges. A battery which appears dead because it is deeply discharged has the highest internal resistance...
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MatrixHDV posted : said by lutful:Please search for some of my old threads about optimal charge current since people have already suggested very high current chargers. FYI you should stay within [C/10]...
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lutful posted : said by MatrixHDV:said by lutful:Please search for some of my old threads about optimal charge current since people have already suggested very high current chargers. FYI you should...
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MatrixHDV posted : said by lutful: Don't accept BS from people who post only knee-jerk contradictions to my sincere comments. :( The information I posted was from Deka a reliable manufacturer of lead...
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Re: [Equipment] Solar backup?
lutful posted : This final response on this discussion is for OP and any other WISP. Deka SLA batteries are similar to many brands used by WISPs.Notice that the absolute maximum charge current under...
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John Galt posted : Charge rates over C/10 may be warranted in particular circumstances, but it is necessary to properly engineer the environment to remove the excess heat. Even still, battery longevity...
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MatrixHDV posted : said by lutful:Hopefully you will now understand why SLAs should NOT be charged above [C/10] or 10% rate in real life. Who said anything about SLA's?
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lutful posted : said by John Galt:Charge rates over C/10 may be warranted in particular circumstances, but it is necessary to properly engineer the environment to remove the excess heat.Each cell also...
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jcremin posted : From: »www.solar-electric.com/deep-cycl···faq.htmlMost flooded batteries should be charged at no more than the "C/8" rate for any sustained period. While some battery manufacturers...
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MatrixHDV posted : said by lutful: Unfortunately for us, lead-acid chargers and batteries are usually not smart designs like Li-ion stuff. Not so, there are many chargers designed for lead acid...
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lutful posted : said by MatrixHDV:said by lutful: Unfortunately for us, lead-acid chargers and batteries are usually not smart designs like Li-ion stuff. Not so... Perhaps you can program a javascript...
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MatrixHDV posted : said by lutful:Smart Li-... batteries have internal circuit to monitor each cell ; other Li-... batteries provide external connection from each cell ; smart Li-... chargers monitor...
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lutful posted : said by MatrixHDV:said by lutful:Smart Li-... batteries have internal circuit to monitor each cell ; other Li-... batteries provide external connection from each cell ; smart Li-......
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jcremin posted : At this point, it is probably worth pointing out that we're talking about a battery backup system to power one or a few small devices. While it would be great to design the perfect...
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MatrixHDV posted : said by jcremin:At this point, it is probably worth pointing out that we're talking about a battery backup system to power one or a few small devices. In which case instead of...
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MatrixHDV posted : said by lutful:Get back when you find individual cell monitoring capability in some commercially available lead-acid charger or battery. What you consider "plenty of smarts" in Eltek...
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Re: [Equipment] Solar backup?
lutful posted : said by jcremin:I think a fairly simple concept is growing into much more of a debate than it needs to for purpose at hand here. If we're talking about a huge capacity system costing...
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John Galt posted : The earth is actually an oblate spheroid... ;)
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lutful posted : Curiously you wrote exactly that back in 2006 when I argued the world could be considered flat for short point-to-point links. »Re: CPE no longer connecting with APArgument starts when...
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Re: [Equipment] Solar backup?
MatrixHDV posted : Or something basic like this.100 watt roof mounted solar panel.[att=1]And inside a basic but functional solar controller mounted to the DC distro box.[att=2]This system while...
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dev0 posted : This thread is hilarious. At least there's some life back in the forum!Gotta agree with the previous posts about the lack of battery backup on the cable side. The best the OP can hope for...
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