deep cycle battery - Page 1
Forum section: electronics / general

author: snipersquad100
author_rank: Frequent Contributor
timestamp: July 15, 2016, 06:34:57 pm
content: Does anyone know where I can get a good deal on some deep cycle batteries for a solar setup.Thanks in advance.

author: System Error Message
author_rank: Frequent Contributor
timestamp: July 16, 2016, 01:04:53 pm
content: You could always use NIMH or lithium depending on whichever is cheaper per capacity. NIMH voltage is much lower though so you will need many NIMH batteries in series. Both of these can be discharged entirely or only partially before recharging.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: July 16, 2016, 01:30:17 pm
content: Generally , the cost per performance is still FLD - Flooded Lead Acid .As your requirements [ not mentioned ] change then using other chemistries will apply , and the extra cost has value .I you are building a hole house system [ not mentioned ] and can have a well ventilated warm space for the batteries , then like I said FLD .If you are back packing and want to run a ham radio on a mountain top , then paying for one of the Lithium chemistries can have there value .2 extreems to gauge in the subject .Back to the hole house , Edison / nickel iron batteries beat the FLD with long life and almost can not be killed through normal misuse , but harder to get and cost more , 50 yr. life ++Best is almost always a bad concept , best is a rabbit hole - but there is a best idea , be informed so that no type of hype will lead you into the rabbit hole .http://www.batteryuniversity.com/

author: Brutte
author_rank: Frequent Contributor
timestamp: July 16, 2016, 01:47:20 pm
content: Quote from: KD0CAC John on July 16, 2016, 01:30:17 pmI would like to know how did you come to the conclusion that "acid" starts from "d"?

author: Jeroen3
author_rank: Super Contributor
timestamp: July 16, 2016, 02:22:03 pm
content: You can get SLA (sealed lead acid) batteries for cheap. If you want to get a battery energy density you could go lithium polymer, but you'd need additional protection circuity.Motorcycles and UPS devices often used SLA batteries. Cars do use lead acid, but not sealed.If you can recover them from a deep cycle depends on the brands. Some 12V SLA batteries can go as low as 6 Volts, they don't tell you what effects this has on the capacity.

author: bitslice
author_rank: Frequent Contributor
timestamp: July 16, 2016, 04:21:29 pm
content: Quote from: Brutte on July 16, 2016, 01:47:20 pmAGM = absorbed glass mat. GEL = gelled electrolyte. FLD = flooded.go on ebay,look for "forklift batteries"probably the best value atm

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 16, 2016, 06:01:23 pm
content: It would probably make the most sense to have a lithium pack to handle the daily cycling and lead acid for the bulk storage. Lead acid likes to be left fully charged, while lithium prefers to stay around half charged. As such, it gives a little room to make efficient use of generated energy.And since you didn't specify what loads you're powering, if there's a significant thermal (heating or cooling) load, the best storage for that would be just some thermal storage material, usually water or a mixture of water and something to lower the freezing point depending on the temperature range.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: July 16, 2016, 10:05:25 pm
content: Quote from: Brutte on July 16, 2016, 01:47:20 pmIts not me , its called industry standard terms , use google for your question , or the link I provided .

author: Monkeh
author_rank: Super Contributor
timestamp: July 17, 2016, 01:16:34 am
content: Quote from: KD0CAC John on July 16, 2016, 10:05:25 pmGoogle 'FLD battery': Random crap about Harleys.Google 'FLA battery': Specific results for flooded lead acid batteries.Seems like 'FLD' is not in common usage..

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: July 17, 2016, 01:37:38 am
content: So mixing up the acronyms , at old age

author: Monkeh
author_rank: Super Contributor
timestamp: July 17, 2016, 01:39:01 am
content: Quote from: KD0CAC John on July 17, 2016, 01:37:38 amOr just a touch of the aixelsyd.

author: KD0CAC John
author_rank: Frequent Contributor
timestamp: July 17, 2016, 01:39:48 am
content: Some that also

author: bitslice
author_rank: Frequent Contributor
timestamp: July 17, 2016, 01:50:54 pm
content: umm, I already posted what FLD means?

author: Artlav
author_rank: Frequent Contributor
timestamp: July 17, 2016, 10:04:20 pm
content: Whatever the deal would be, it's better be local - such cells are really heavy, and the farther you'd have to ship them, the better a deal you would have to get for it to be worth it.

author: Red Squirrel
author_rank: Super Contributor
timestamp: July 17, 2016, 10:14:52 pm
content: Yeah I find lead acid batteries is one of those things that is often cheaper locally. If you're looking for flooded acid, Canadian Tire will usually have +-100AH ones for a bit over $100. For smaller gel cells you can try an electrical distributor shop, or alarm shop. I usually get mine from a place called Dixon Electric and they're like 20ish bucks vs the $200+ that APC wants for the exact same battery with their sticker on it.

author: Brutte
author_rank: Frequent Contributor
timestamp: July 18, 2016, 06:21:40 am
content: Quote from: Artlav on July 17, 2016, 10:04:20 pmSounds like "don't buy Chinese products" to me. You are too old to notice the distance plays insignificant role in today's trade. Shipping a 24t container from PRC to EU costs 700 euros. That is 0.03 euro per kilogram of goods. I'd say that putting a sticker on a 20kg battery in europe costs more than shipping it from HK.

author: DenzilPenberthy
author_rank: Frequent Contributor
timestamp: July 18, 2016, 09:38:44 am
content: What sort of size battery bank are you building and what's your budget? Also what sort of solar setup is it? A whole house system or a couple of lights in your shed?I'd definitely recommend staying away from 'leisure' batteries if you want long life (especially the no-name brands)I've used these in the past and I'm very happy with them, Trojan T105-RE. They are optimised for the partial cycling that solar batteries often see. As with all flooded batteries they need maintenance e.g. topping up with water and equalising but if you keep on top of that they will last for ever.Alternatively Rolls make similar very durable flooded batteries and also sealed AGM ones which are maintenance free (but more expensive).http://www.windandsun.co.uk/products/Batteries/Trojan-Batteries#.V4yjNfkrLcshttp://www.windandsun.co.uk/products/Batteries/Rolls-Batteries#.V4yjIvkrLcsI got my Trojans from Wind and Sun (but that's because the owner is a mate of mine and he gave me a sweet deal). I'd recommend giving them a ring to discuss your application and see what they'd recommend.

author: Kilrah
author_rank: Unknown
timestamp: July 18, 2016, 09:45:50 am
content: Quote from: Brutte on July 18, 2016, 06:21:40 amYou should go explain that to the different delivery services then.It may cost 700€ to ship 24t port to port, but the local delivery services will then ask you 100€ to carry that battery over 50km to your place.

author: Red Squirrel
author_rank: Super Contributor
timestamp: July 19, 2016, 02:21:45 am
content: Quote from: Kilrah on July 18, 2016, 09:45:50 amYep there's a certain threshold where stuff is just too heavy to ship.I remember looking at used rackmount UPSes on Ebay. $100 for the UPS, $700 for shipping. No thank you.

author: rrinker
author_rank: Super Contributor
timestamp: July 19, 2016, 02:56:44 pm
content: I've obtained several UPSs on ebay for cheap, almost always a dead battery, shipped without the battery so it doesn't cost much. Then order a battery from one of the big batter places for a fraction of price the UPS maker charges. One such battery seller is within the 2 day delivery range of the cheapest UPS ground transport, too. Very handy.