Accidentally put this in the 'shop' reviews...
Sorry.
It belongs here, in the product review section.
I have eight of these batteries, some purchased in October 2024, and the rest in November of 2024. The battery bank is connected as two in series for 24 volts, and the four strings of those in parallel for 400 amp hour via individual breakers.
They have all performed FLAWLESSLY up until about a month ago, when I started having trouble with the Bluetooth app after it was updated.
Now, seven of the eight work fine, but I can't get any data from the one battery. It shows up in the scan lists, says it has connected, but no information comes up on the app. I decided to check its voltage thinking that if the bluetooth didn't work right, and I could still just run it in the bank as if it was a battery without bluetooth and I'd monitor it with a voltmeter or use the Victron shunt isolated auxiliary voltage input that is designed to monitor other batteries at the same time as it 'watches' the main battery bank.
Grabbed the voltmeter and the voltage was way off.
The bluetooth app still 'sees' the battery and says it's connected, but no data posts on the app.
I've isolated it and tried charging it with a bench power supply, (set to multiple voltages from 12.8 up to 14.6 volts,) and it won't take a charge, nor will it source any current to a load. A high impedance voltmeter (20 Meg Ohm) shows 5.5 volts, but when any load is placed across the battery, the voltage drops to zero. (I use a 120v 250w incandescent bulb with clip leads to 'pre-charge' the inverter input caps before closing the battery breakers to avoid damaging circuit breaker contacts with the high inrush current,) and I placed it across the battery terminals. The voltage drops to zero.
So, something has gone sideways with not only the bluetooth, but the BMS apparently has a problem as well.
I'm waiting for instructions from Wattcycle on how to proceed, but with that battery down, I've now lost 1/4th of my battery bank capacity.
Battery is nice but the BMS Meta app quit working just a few days ago. I don't understand why it requires a connection to a Chinese server when it only needs local Bluetooth access. Please fix the app.
Replaced damaged battery at no cost.
A good product, I'm getting another one.
This battery last me eight or nine days before recharging.
Great power storage in a small package!
I had two 100ah AGM batteries before these and they took forever to charge and I was always watching my battery die too fast now I have these batteries the two of them weigh less than one of my previous batteries and when camping this weekend I never got a low battery alert
Powers my solar system effortlessly. Lightweight and compact. Overcurrent protection offers peace of mind.
EVE cells deliver outstanding energy density. Lightweight and easy to handle. The overcurrent protection works great.
Installed this in my off-grid cabin. Compact size and high energy density exceeded my expectations. It powers my appliances smoothly, and I feel safe with the overcurrent protection. I’ll be upgrading to Bluetooth when available.
I’ve used this battery in my solar setup for a month now. The EVE cells are efficient, and the lightweight design makes handling easy. Overcurrent protection is a great safety feature.
Runs my appliances for days without a recharge. Overcurrent protection is a nice safety feature. Looking forward to the Bluetooth model.
EVE cells provide consistent power for my off-grid cabin. Small size fits snugly in tight spaces. Highly impressed with performance so far.
Perfect size for my camper. Lightweight and easy to install. Runs all my devices effortlessly. Highly recommend for anyone needing a powerful yet compact battery.
Well built battery and I love the light weight. I only used it one time so far but it worked great. Waiting for spring to get more use out of it.
Thank you for your feedback! We're thrilled to hear that you’re happy with the lightweight design and performance of your battery. It's always exciting to see customers satisfied with their purchase. We hope it continues to power your adventures smoothly this spring and beyond! If you ever have any questions or need assistance, feel free to reach out. 😊
Great value for the price. I’m happy with my purchase and will buy from WattCycle again.
I wish they had a 80 amp charger for faster charging.
Thank you for your support and for sharing your setup! We’re thrilled to hear that you’re loving the WattCycle 300Ah batteries and putting them to great use in your 48V system. 💪 It’s always inspiring to see our products powering innovative setups. If you ever need assistance or decide to expand your system further, we’re here to help. 😊
Been running 4 100ah batteries in my bass boat for almost 2 years and I’m on the water weekly. Zero issues and plenty of power for what I need.
Awesome service quick response and easy to communicate with. I will definitely be doing business with WattCycle in the future
Thank you for your kind words! 😊 We’re so glad to hear you had a great experience with our customer service team. Providing quick and clear communication is always our priority.
Long lasting and the range is unexpectedly good. Very efficient and this brand is of superior build. See You tube review of the take apart build of several brands. This Lifepo battery is tops and I can highly recommend them.
It is too early to rate the batteries. But from other experts, it does seem to do as promised. I will update in the future.
3 100ah batteries wired in series monitor only shows 100ah, not 300ah.
Hi, thanks for choosing WattCycle. Connect 3 batteries in series can not increase the capacity, it will in crease the voltage. Your new system is 36V 100AH (3 in series) If you connect them in parallel you will get 300AH.
Batteries are very good, but the monitor only recognized one battery as wired in series, saying 100ah when should show 300ah.
Hi, thanks for choosing WattCycle. Connect 3 batteries in series can not increase the capacity, it will in crease the voltage. Your new system is 36V 100AH (3 in series) If you connect them in parallel you will get 300AH.
Fantastic price, charged right up using a 14.6v 20 amp AC-DC charger. Ready for use!