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Post by rizzoa13 on Oct 6, 2017 5:16:21 GMT -5
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Post by huntsgemein on Oct 6, 2017 7:43:31 GMT -5
I wouldn't mind a problem like that!
I gather the 8-bay wall charger is pretty slow (3 amperes?), but with a total combined capacity for 10!! batteries, who cares?
Aside from the drill, what else are you running?
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mattj
Junior Member
Posts: 59
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Post by mattj on Oct 6, 2017 8:05:30 GMT -5
Nice! Does the big charger charge each battery sequentially, or will it charge two or more at once? How long to bring a fully depleted battery to full charge? How long for four batteries? Eight?
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Post by calidecks on Oct 6, 2017 13:58:07 GMT -5
Is the charger available in the US?
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Post by calidecks on Oct 6, 2017 14:00:35 GMT -5
Found it www.tools-plus.com/metabo-627301000.htmlHighlights: Fast, parallel charging of up to eight Li-ion and LiHD slide-on battery packs from 14.4 - 36 volts; no time loss when charging multiple batteries at oncePatented "AIR COOLED" charging technology for all individual battery packs for fast, safe charging Robust aluminium housing with hook for space-saving wall mounting. With carry handle for mobile use With a lead (680 watts) for 8 full-power charging stations with process-controlled charging management for each individual battery bay Side on/off switch for the entire desktop charger Charge rate: each 3.0 A Charge time: approx. 30 minutes at 1.5 Ah; approx. 80 minutes at 4.0 Ah Space-saving and tidy solution, ideal for medium-sized and large industrial companies and large trade companies. Easy maintenance, requiring only annual BGVa3 test for lead cable, rather than 8 tests Tech Specs: Brand: Metabo Model: 627301000 MPN: 627301000 UPC: 4007430313331 Type: Battery Charger Voltage: 110 - 120 V Frequency: 50 - 60 Hz Package Qty.: 1
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Post by rizzoa13 on Oct 6, 2017 16:25:29 GMT -5
I got it off of eBay for $400, retails for a thousand so I couldnt pass it up.
It does charge them all at once and then shuts off each charger so it doesn’t damage the batteries. I leave it plugged in all day and just rotate batteries back onto it.
I’m powering the dual 18v (makes 36v) sds rotary hammer drill, 4 drills, cordless grinder, light and battery chopsaw.
Once the table saw and vacuum come out I’ll pick them up for convenience sake and I plan to snag the kss50 and mt55 when funds allow 👍.
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Post by huntsgemein on Oct 6, 2017 17:52:19 GMT -5
According to Metabo's own literature, @ 3.0 Amperes charge current their Li-HD battery "family" will take between 65 & 150 minutes dependent upon the batteries' native charge density.
Slow charging maybe, but a slow charge is a "good" charge as far as overall batt life is concerned. Besides, with no less than ten! charge slots available who cares?
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Post by rizzoa13 on Oct 6, 2017 18:19:36 GMT -5
The batteries have such long runtime that even when I had two batteries and one would die, by the time I ran out the 5.2ah battery the other would be fully charged. It usually takes a full day to run one down on most of the tools.
The 2x18v sds hammer is a hog though and can really go through the batteries. It can also drill a 1 1/4” hole effortlessly in reinforced concrete so I’m ok with it killing batteries.
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Post by rizzoa13 on Oct 7, 2017 8:25:20 GMT -5
My next project is going to be figuring out a way to take my un-needed single Metabo chargers, link them together and get them to power a sine inverter to create 110v 🤓. Make up a few of those so I can run my mains tools off battery power and then I’ve really got something!
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mattj
Junior Member
Posts: 59
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Post by mattj on Oct 7, 2017 12:18:14 GMT -5
Fantastic. I wish Makita had a similar option avaiable. My new(est) favorite tool is their 2X18v leaf blower, and I only get 13 mins runtime with 6ah batteries. The 4 port sequential charger is ok to keep the jobsite going, but not nearly fast enough to keep up with the blower.
Metabo is really piquing my interest these days.
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mattj
Junior Member
Posts: 59
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Post by mattj on Oct 7, 2017 12:32:48 GMT -5
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Post by huntsgemein on Oct 7, 2017 15:54:03 GMT -5
Bosch & DeWalt already have rechargeable inverters available. The former takes a similar form to the Tesla & Samsung "battery walls" in that it has huge capacity, is mains rechargeable & can be used for battery charging through their standard range of chargers or operation of corded tools through inverter powered AC mains outlets, with the capacity to make it a viable "cordless" worksite (well, off-grid anyway) power source. It's still relatively portable due to the addition of wheels and a trolley format.
The DeWalt version is a mains powered dual?? battery charger that will also invert power from these batteries into 110v mains for low powered (think flexvolt type) tools. Capacity is therefore rather limited to the mean capacity of the 2 onboard batteries.
If nothing else, either of these devices would be useful to analyse their internal electronic architecture, which could be imitated & the original device onsold. I'd suggest the former device has the best scope for achieving what you require. It also has the capacity to actually be useful for its intended task.
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Post by rizzoa13 on Oct 7, 2017 19:29:45 GMT -5
I’ve seen that dewalt power supply at the local depot and it kind of got me thinking why couldn’t I put something together? With say 5 of these LiHD batteries I feel I could run something large for a pretty good amount of time.
I can see all kinds of applications for it too. I’ve got powered pump jacks and having an extension cord hanging off the edge of them can be pretty annoying. Battery drills will run them but it’s slow so having the power supply up on the top staging and being able to run the two mains drills off it would be super handy.
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Post by huntsgemein on Oct 8, 2017 17:48:17 GMT -5
5 batteries won't last long with high current demand devices: grinders, saws, Max hammers etc. Additionally, you must guard against exhaustive discharge - deadly for lithium cells. Almost all quality cordless tools incorporate circuitry to prevent this happening, which is the "shutdown" phenomenon we've all experienced, often @ inopportune moments!
Many domestic stand-alone solar power installations have protective inverters incorporated to protect against battery system damage. These are relatively inexpensive simply because there's a bigger market for them to date. But it's overall capacity that will be your limiting factor. Ideally, you'd require about 20 batteries minimum, and even better possibly 100 or so to achieve meaningful mains substitution battery power. Maybe you could consider some type of lead acid gel battery array; 2 x 100-150 ampere gel batteries connected in series for a 24v base are often used for temporary mains substitution to run light loads (lights, fridge etc.) in caravans, RVs & 4WD campers. This could all be mounted (including the inverter) on a trolley or sack truck for portability & recharged overnight.
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Post by rizzoa13 on Oct 8, 2017 18:47:38 GMT -5
I’ll defer to you as you most likely have more experience but it would surprise me that 5 batteries wouldn’t create the kind of power I’m looking for.
2 of these 18vs making 36v power the rotary hammer and it’s a monster. I mean two of the newer 7.0 batteries will power that huge 9” grinder. There has to be a way.
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