MEXICOWANDERER
Explorer
Joined Jun 01, 2007
User Profile
User Widgets
All Activity
Re: telcom battery bank
I've yet to stumble across a conversation that mentions which brand of lithium battery is a standout; survival or cycle wise. That might have to do with the actual weight of each module. It would be hard for me to swallow "a cell is a cell" when it comes to lithium. Unlike western economies I am unable to dig up much information on the subject of China and lithium battery manufacturers. The small experience I have with another type of lithium. Battery is rather sour. Replacement batteries like for my ereaders use reclaimed cells. Lifespan is less than half of a new battery. The sales pitch though is outright fraud. Keep in mind this is a different type of lithium battery to begin with. Until LTH starts making lithium batteries here in México I am leery of going automotive size lithium. For solar the Tesla wall pack looks entirely legit. I need more factual info.1.1KViews0likes0CommentsRe: telcom battery bank
The usual scenario for telecom site batteries is design for long float life with perhaps a dozen or so major discharges. But long term survival at low voltages isn't in their job description. Paying up the yangying for a lifeline means getting incredibly thick plates. Controlled overcharging sheds substantial amounts of plate material. But if they're super thick it's like having a checking account overdraft protection plan. But the chances of survival for a battery with lesser thickness plates is less.float maintenance for 10 years will consume a chunk of plate layer as well. By the way Don if you ever get your hands on a regular transformer rectifier battery charger you can throttle it with your variac. A Fred Flintstone grade sort of adjustable charger.1.1KViews0likes0CommentsRe: telcom battery bank
I haven't performed a standardized ampere hour test but I did do this... Let it sit as I described. Then operated a tube heated 24 volt heated reservoir ResMed BiPap for 17 hours (total) via a 300 watt Samlex PSW inverter, disconnected everything then it sat for (perhaps) 4 days. Observed voltage 12.69 Keep in mind this battery was picked up March 2012 and stood standby for many years being maintained at strictly observed Concorde float values Conclusion: like me the battery is obsolete so formal testing would be moot. I mentioned this merely as being curious. There is no reason to be prejudiced by assumption. Until I can walk again or have motive assistance I seem to be "stuck" in an environment that has near infallible electrical service. My neighbor across the street is a regional bigwig for CFE the government electricity agency :D1.1KViews0likes0CommentsRe: telcom battery bank
A few months ago I posted a note about recovering a 11 year old neglected Lifeline AGM. To make a short story shorter, I ended up leaving the battery connected at 15.5 volts for two weeks. No it didn't heat up It did not lose 1 gram of weight But yes, it finished holding 13.3 volts @ 55° for a week afterwards. Neglected? Yes. Disconnected for 3 years172Views0likes0CommentsRe: Square wave inverter to LFP battery?
I can only comment about things I have seen. I have not played around with pure sine wave. But seven different modified sine wave inverters reverted to square wave after battery voltage sags to a critically low level. Trace, Xantrex, and others did it. Forty years ago the instantaneous burn out of an electric blanket control taught me to be careful with asymmetrical wave form power. Inductors heated up and caused FET transistors to draw additional amperage. Electrical motors ran hotter. Batteries discharged significantly faster. ;) your mileage may vary723Views0likes0CommentsRe: Amplifier for television?
Wayback Machine Time Fifty years ago my parents were heartbroken when they moved and their favorite TV station came in heavily snowed with terrible audio. They already had a Channelmaster rotator and an antenna amplifier perched forty feet above the ground. I went to a professional Television cable service supply house and purchased what they called a Cut channel antenna It was a monster. Although made of aluminum its twenty six dipoles weighed over thirty pounds and it was just shy of ten feet on length. And to add insult to injury a different masthead amplifier was needed. Even after all that rabbit ears on a TV in the same city as the station would have given a better picture. They had a Motorla Quasar color TV. The cost was absurd. But they were happy. It was a gift.680Views0likes0CommentsRe: EMS
Surplus Electronics stores sometimes have them. I bought 120 units pallet of them in Rohnert Park California 43 years ago. They were military USAF unmarked 460 watt multitap. -30 20 10 0 + 10 20 30 for $440 Full 50db isolation. You may have to drive to a big city or to near a USA USMC or USAF base. Mew ones as you know are expensive.742Views0likes0Comments
Groups
Bucket List Trips
Bucketlist destinations you just can't miss. Which spots stick with you?Aug 08, 201613,488 Posts Chefs on the Road
Campground recipe recommendations, restaurants, and more!Jun 27, 20142,136 Posts Motorhome Group
Join in here to discuss all things motorhomes.Jan 10, 202638,766 Posts RV Newbies
We all start out new. Share lessons learned or first-time questions!Dec 23, 20254,032 Posts Travel Trailer Group
Prefer to camp in a travel trailer? You're not alone.Jan 19, 202544,056 Posts
