Wattcycle 12V 20A LiFePO4 Battery Charger with Smart BMS Protection for Solar & Home Backup

Changed all my sealed lead acid batteries with just two Watt Cycle batteries. Installation was easy and the app is a game changer.

So far the battery has operated great, but in order to use the Wattcycle app, you can't be more than a few feet away from the battery. There is a plug on the BMS board for WiFi, so hopefully Wattcycle will take advantage of that, sooner than later

Did you know this product along with a ecoflow smart generator power adapter can be used with power kit V1 and V2 we camp off grid but many times we are close enough to use a golf cart (50 mile range) 6.3kwh battery in cart. You can use the adapter to recharge the golf cart, and I now have the ability to have power back up when the golf cart isn't being used . I am also going to purchase another cable and take my Delta 3 with a zoupw 480 watt solar panel power my tools and recharge my cart at same time. To cool for school!!!!! I will be showing these features memorial day week next year thank you!

Best price and quality

we have recieved 2 batterys very please whith te races we like 2 buy 2 more perhaps eith a discount

Very easy to order and timely delivery.

Bluetooth security by proximity.

Great process of order. Still not tried the battery, but all good so far!

Quickly replaced battery after receiving it damaged in shipment

I bought this mini battery to run the electronics on my boat. It should have plenty of power to run everything and not take up much room in the compartment

Hard to give an objective review this soon after purchase. But, the battery is 3x more powerful than my age and half the weight. I switched my two house batts to these and I doubt I would ever run them down in my boat. I a, using the 24v 314ah battery to run my AC onboard and that battery performs amazing. Hours of run time to get to 75%! High hopes for wat cycle. I appreciate that they own mistakes and provide explanations of the fix implemented and back it up with a white paper. Ty

Добър уред! Работи много добре и бързо зарежда батерията от 300A. Лек и компактен. Не- загрява много по време на работа.
Като недостатък бих отбелязал че когато зареди акомулатора в последствие не продължава да го поддържа(при консумация не се включва автоматично да дозареди).

Le vino de maravilla a mi ecoflow Delta2 max y la realidad que ahora su autonomía y su rendimiento es es el doble y triple dependiendo que estés cargado, es un éxito, voy a comprar otra,por ese precio no hay una mejor que ésa.

Right now, I need to be within about 6 ft of the battery in order to get a reading like the capacity of what remains. It would be very helpful if I could get a reading 12 to 15 ft away instead of almost right next to the battery. Other than that, the battery has been great so far

Battery seems OK but Support is terrible. Documentation has ZERO information on their "4-function" switch, which has only two unlabeled positions and appears not to work at all. The US based phone support number is never answered and only generates an email from someone (NOT Tech Support) in China. So there IS NO U.S. based support. Not impressed.

VERY EASY WEB SITE.

Ordering was very easy.
The order arrived quickly once we got the physical address straightened out.
I’ll be buying more of these batteries from Wattcycle.

Seems like a good quality battery.

Online shopping here was so easy.

The only bit that I'd recommend is on the page where you're selling the server rack battery & cable, is to have a list of all the unit models that the cable is supported by - it'd just help those buying the cable, to be able to cross reference against what they're seeing on the company's website.

I thought you could hook this to your main panel with power applied from grid and it would supply the panel when the grid power went down and not feed back to grid because it had ct to keep it from feed back to grid. that is what i thought a hybrid inverter did. this does not do that you have to manually disconnect from grid then connect to main panel to power your house. Other then that is works good supplies plunty of power and charges batteries well.

Fast shipping, good price m great product. Will buy from them again.

Shopping was easy, the web page has good information about the products and shipping was fast and free. I purchased two batteries for my rv, they are installed and working great.

Great products

I got a Cyccle Volt (random amazon purchase) 51.2V 50Ah LFP battery attached to a Delta 2 using this cable. At first I didn't notice anything. The Delta doesn't go out of its way to rebalance the power station with the external battery. But when you charge the power station and fully discharge it, you notice it takes a while to discharge, and the recharge time + estimated run time all seems a bit long compared to what you'd expect; it's as if the D2 suddenly has 3.5kWh (1kWh D2 + 2.5kWh external battery). So it is working as it's supposed to.

What an amazing addition to the Delta series! Those D2 and D2Max batteries (and compatible D3's) can be used in so many circumstances if you add a 2.5 or even 5kWh external battery. I think you can daisy chain multiple identical external batteries in parallel too although I don't have such a setup to try.

Love it. Feel quality. Just works!

Both battery packs are connected and successfully charging in lieu of the next blackout

I purchased the WattCycle 48V 100Ah server rack battery to pair with my EcoFlow Delta 2 as backup power for my home's gas furnace, water heater controls, and Starlink.

Performance has been excellent. The battery charged to 100% without issues and successfully powered my system through a nearly 10-hour simulated power outage. It also recharged properly afterward, and the Bluetooth app worked well for monitoring voltage, current, state of charge, and temperature.

My only complaint is the condition it arrived in. The top cover was bent enough that there is a noticeable gap between the lid and the case (see photos). The battery functions normally, but cosmetic damage like this shouldn't happen on a heavy server rack battery. I suspect it was damaged during shipping or wasn't caught during quality control before it left the factory.

If the case had arrived undamaged, I would have given it 5 stars. The battery itself has performed exactly as advertised, so I'm keeping it because it works well. I just hope WattCycle improves their packaging and quality inspection for future customers.