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I am unaware about the speed reduction, but have read about the cold. The scooter gets parked inside so it's not a problem While the batteries were twice the cost, the expected life, additional range, lower weight (10 vs 25lbs each), deeper discharge capability and warranty ( 5 year vs 1 year)...

I'm new to the forum for about 3 weeks now, retired and living on a smal farm in south central Kansas. Will's hand truck took me a couple of weeks instead of 20 minutes while waiting for parts but mostly because bedause I've been esploring the forum and a lot of great information. Thanks so...

Okay, I charged them individually, installed them and gave the scooter a test ride which was successful and lasted longer than the dead SLA batteries. Both chargers seem to work fine, and I'll report back later after I give the scooter a serious workout. Thanks for everyone's help and tips.

Thank you for the suggestion. No, I can't see the cell V. The charger is no frills. I'm rapidly finding this can be as expensive a hobby as Amateur Radio turned out to be.... :) 73, KF5LEF

This is informative also: https://www.energy.gov/sites/prod/files/2021/02/f82/Guide%20to%20Federal%20Tax%20Credit%20for%20Residential%20Solar%20PV%20-%202021.pdf Specifies it can be off grid as long as it is being used to power your home or items within it. Going back to my original post...

One thing you should do if you haven't is to look at a couple of videos about connecting batteries in series and in parallel. they both have pros and cons and if you use both methods together you should be aware of them. Make sure the batteries you use are able to connect parallel or seriess as...

Exactly. I had a battery distributor tell me they didn't make a LFP for my scooter... I said tihere were a couple of companiesi that did, and proceeded to replace them. Not everybody can do their own replacement but they can have a family member or friend help them. They weigh much less than...

Using Android. Please see the thread below where I tried to describe more fully the problems I had. The version of the Android app was the latest but did not match the manual. if you'll message me on how to capture a screenshot of the app, I will try to send it to you. I'm old school when it...

Thanks for your recommendatios on making the tests more uniform and accurate.. I've got a request into Millertech for more detaileled charger characteristics. I don't have access to the BMS... just a list of parameters and settings that LiTime sent me. Will try again once I get the Millertech...

Thank you. i will do that shortly.

I started with Wil's hand truck system but could easioly have started smaller. Rather than take 30 minutes as Will proclaimed, it took me 3 weeks as it caused me to delve into the forum where I began my ascent up a steep learning curve. Everytime I thought I was ready to proceed, I found another...

Missed your question! Yes, that equation is correct. I'm not quite sure of your level of experience, but you might also look at Will's Basic Electricity video and Battery Capacity videos, pretty short and swwet. Oh, and my favorite safety video for beginners on How Not to Kill Yourself...

I'll beg off on making comments on your system. I'm not quite there yet...! Somebody out there should chime in.

Agree. I believe it is good for off grid. I would be comfortable claiming it. You can look at the actual IRS code if you haven't. But of course, you have to be.

I tend to think of storage as watt hours... Your voltages and currents are correct. First case you've got 2400wh; 2nd case 4800wh. Please correct me if wrong anybody.

Ok, another newbie question related to the scooter batteries. They are used in series in the scooter so I charged them individually. The chargeer put out approx. 14.4V during charging. The green light came on indicating full charge. I let the batteries rest sevdeal hours and the terminal...

Did you get this to work? I finally did with Sig customer support, but neither of the below links helped. There appears to be multiple App versions out there and the real trick seemed to be getting my phone to stay on the P/N Wifi long enough to configure SmartEss.

Meant "above video" Also the manual did not help..

Thanks for the info. I tried cooresponding with the company but it's a bit frustrating asking a question, waiting a day for a response, then asking another question, but they do try. I agree it might be the charger, but could the BMS be doing it also? The batteries must not have had much charge...

Yes, we do. I don't doubt it; the cost, risk and political visibility of success or failure drove a lot of the thinkinmg.

Ha ha... my list of projects is growing rapidly... I've got a larger scooter I use around the farm that will drop 50+ lbbs from the total weight by going to LiFePo4, so unless it's got a speed limiter I can't find, I shouldn't have any problem exceeding its advertised 11mph limit!

So, according to the distributor (and my listening skills): 1) The chargerr charges at 10A until near the end of charge, when the current drops to 1-2A, at wich point the green light comes on and charger maintains voltage at 14.4-14.5 2) At this point, it is trickle charging at a few tenths...

Thanks. Most of the LiFePO4's I've received were shiopped at about 60%, These seem to have been lower, but each was individually charged before using. Appreciate the info!

Yes, I did connect yesterday with help from the SigSolar team but on my attempt to use the manual, things fel apart around steps 5 and 6. My issue appeared to be related to 2 things: connecting tot the P/N wifi with my phone, and the app I saw (downloaded a few days ago) did not appear to bae...

Okay, I'd like to try one more time.... I do now have a CBA 5 but will probably wait to check the capacity when I balance the scooter batteries in the future (it is not easy to extract them from their cases). Here's what I'm struggling with (response from LiTime). Before I try communicating...

Newbie here. As my first project, I plan on building the hand truck system I saw Will present based on the EG4 3000XP and EG4 48v 100ah battery; currently waiting for parts and reading online manuals. 1) The EG4 3000 XP manual recoemmends that a separate DC over-current protection or...

Never mind. I got it. I'll post it shortly

Makes sense, thanks. The reason for the 2 1/2 batteries is this is the current configuration with the SLA batteries on the scooter. (U1 sized compartments).

Just as an added data point for you, I've been running my Aircurve 10 periodically on a dc adaptor made specifically for it and a 65ah (now 5 year old) MillerTech Lithium battery. I get 3 nights out of it (8 hours), but my cpap has a humidifier and heated tubing which raise the power...

Thanks, any recommendation on how frequently balancing should be done. I've seen once per year, and more frequently...? Also, still wondering about the manufacturer recommendation to connect the batteries in parallel (without charging) for 12-24 hours after they both have beenindividually...

That was my typo in the first post. I have a wireless keyboard that seems to be touchy. The batteries in question are 12V 45Ah replacing 12V 35Ah batteries, and they work fine. I've been using them for a couple of weeks now. Thanks!

Other's may have more experience wiuth this, but since it comes down to your responsibility, you should check with a tax professional. Here's a description of the code: https://www.irs.gov/credits-deductions/residential-clean-energy-credit#works Seems like it MIGHT qualify under 2 sections...

Thanks, this seems to be in line with Will's video I watched on series connections. He stated the charger should bring them to similar SOC. That's why I was puaaled on the manual's instruction to parallel connect for 12-24 hours after individually chareging them.

Yes, the cutoff voltage was set to 10V in each case. I did not that the app indicated the BMS was balancing cells for several hours after the 2nd charge. Thanks!

Thanks!

I'll probably try one more time to see if it now stable.

Working on the same build! Will's video indicates a MINIMUM of 3 panels with the right voltage to get it total voltage above 120V/ 4 or more would be ok too. Account for extreme cold depending on where you live.

I guess I was testing the BMS. Low voltage cutoff in the BMS is 10.8.

Thanks! I don't know enough to doubt the capaities. This is first time I've used batteries in series and one of the first times I've used LiFePo4. I watched Will's video on series connections and am just starting to look at BMSs. I do have a tester coming so I might check them out the next time...

Thanks, just got my analyzer, and the 2 batteries are on my to do list!

Given I have only the app to rely on for this battery to indicate balancing, any reconmendation for the green light period to continue while balancing is indicated? For my EG4 server rack battery, I have the BMS Tools which I'm coming up to speed on. Haven't really used the Tools yet. For a...

I'm hopin g to replace 2 12/ 35ah SLA batteries on my mobility scooter with 2 12/8 45kah LiFePo4 batteries (Li Times) The form factors are idential (U1). Dimensions are sup-posedly the same (I'll double check) A couple of questions 1) Is there an issue with the higher Ah rating (45 vs 35)? My...

Newbie here. These are the 2 first tests of a LiTime 12V 100Ah battery recently purchased using a basic CBA 5. The capacity increased about 2% between the first and second test. Is this real? and if so, what is a likely reason? In each case, the battery was fully charged using 10A (0.1C) and...

I followed a video that signature solar sent, but can't get past the first step which is connecting my phone to the P/N of the dongle. Says No Internet Access.... I'm about to give up, I've spent way too much time on this... Anyt advice would be appreciated

Regarding previous note, I have an EG4 3000

Thanks! Good advice. I didn't feel like a Pi projexct on top of everything else!:)

Thanks!

Absolutely! I'll write it up just a bit later.

Thanks for clarifying. I don't know. Charge was done with a Millertech Lithium Charger 10A which flashes red while charging, green when finished. I assumed (yes, I know...) that there was no charge input after the green light came on. Then I let reset (disconnected from everything) fork 1/2 day...

Balancing was indicated in the app while the battery was disconnected.

Welcome! I have learned a lot but have a lot further to go! Good luck on your endeavors!

Thanks! I used to love that show: Danger, Will Robinson! :) Well, sofar justr working on simpler stuff: dc dc converter and adding solar array to the hand truck.

I believe the problems I had were 1) Android related and 2) App version related. All in all, I feel the EF4 is in pretty good shape in that section with a couple of possible tweaks. Remember, this is from a DIY Solar Newbie perspective, although I spent a lot of my career in the RTM mode (Read...

Ha! You guys have been teaching me tons. Great forum!

Ok, understand. Thanks.