The product was delivered on time. But part of the deliver is a wire to connect all circuit boards, lengte supplied is not enough to connect all boards. Second, i have an connection issue to the... See more
Company replied
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See what reviewers are saying
We chose 123SmartBMS for the new custom-built LiFePo4 battery of an old Peugeot 106 electrique. The quality of the 123SmartBMS is exceptional. The received boards look super solid, all connectors are... See more
I looked at all available BMS and ordered 2 sets for the 2 12v 4s batteries than I have been building. I placed the order and the package arrived less than 48 hours later, from Holland to UK. They wer... See more
As a second time purchaser of BMS components from 123electric.de I can honestly say the experience was far better than expected when considering international shipping. The products were in Californi... See more
4.8
Excellent
110 reviews
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People also looked at
Help in guidance of selecting the right…
Help in guidance of selecting the right system.
8 August 2025
Good communication and speed!
26 July 2025
Everything okay
2 July 2025
Price of 123Smart BMS is way too…
Price of 123Smart BMS is way too expensive and it does nothing out of the box. It needs solid state relays to work and more stuff. Voltage accuracy is very bad 0.03v difference!!! And no way to manually compensate so it debalances the battery over time(from experience) We need voltage manual compensation!!!
9 June 2025
Reply from 123electric.de
Hi Andy,
We're sorry you're not satisfied with the products we offer. Here's what Sebastiaan from Albertronic has to say about the system:
"We understand that our system may appear more expensive than generic BMS units from, for example, China. However, it’s important not to look at price alone, but also consider what you get in return in terms of reliability, safety, and flexibility.
The 123\SmartBMS is fully designed and manufactured in the Netherlands, which allows us to guarantee quality, support, and safety in ways that cheaper alternatives simply can’t match.
1. Flexible and Safe Power Switching
The 123\SmartBMS works with external relays. While this may seem more complex at first, it offers major advantages:
- Freedom to choose your own relay: Select the ideal relay for your application — mechanical or solid state — without being limited to whatever is soldered onto a PCB.
- Handles high current and voltage: Use relays that can safely switch over 200A and more than 100V. Generic BMS units with built-in relays often fail at voltages above 60–80V.
For example, if an MPPT charge controller fails, full PV voltage can be applied directly across the relay. A built-in relay in a generic BMS can’t handle this and may get stuck closed — leaving your battery unprotected with potentially serious consequences.
- Real protection: With a properly selected external power relay, your battery remains protected even under unfavorable or fault conditions.
- Modular: you can expand the system to over 16S. Besides, if a part of the BMS ever needs replacement, you only need to replace a single part like a BMS board. No need to replace the whole BMS.
2. Reliable Balancing and Maximum Battery Capacity
By setting the charger’s absorption voltage slightly above the balancing voltage (as described in the manual), the system will consistently balance the cells — as long as regular charging occurs.
- Voltage measurement accuracy within 30mV: This ensures all cells stay within 1% of each other in capacity. Your pack will be perfectly balanced.
- Recommended balancing voltage of 3.5V for LFP: This allows you to extract the maximum usable capacity from your battery, without overloading the cells."
We hope this helps you understand a little better.
Kind regards,
The 123electric.de team.
Nice product, but the support could be impoved.
The product was delivered on time.
But part of the deliver is a wire to connect all circuit boards, lengte supplied is not enough to connect all boards.
Second, i have an connection issue to the victron inverter. I send an email with a request for support, untill now i did not have received an response.
edit 2025-04-23 after resending my email, 123electric has respond adequate.
23 March 2025
Reply from 123electric.de
Sorry to read this. We always reply to our e-mail. Did you check you spam box? Did you send it to 123electric.de ?
Superb quality and customer support!
We chose 123SmartBMS for the new custom-built LiFePo4 battery of an old Peugeot 106 electrique. The quality of the 123SmartBMS is exceptional. The received boards look super solid, all connectors are designed very well and it was a pleasure to work with the system! The documentation found on the product website is everything that is needed for the installation. First tests of the assembled battery (40 LiFePo cells) show that the BMS is working as expected. Monitoring was done with the mobile application and manually by measuring each cell parameters. Thank you very much!
5 December 2024
As a second time purchaser of BMS…
As a second time purchaser of BMS components from 123electric.de I can honestly say the experience was far better than expected when considering international shipping. The products were in California in a few days, and the 1st system installed. Installation was simple and use of app is seamless.
10 September 2024
Great product
Great product, very adaptable can be made to do almost anything with the relays and Victron integration.
9 September 2024
So far so good!
19 December 2023
Good prices, Shipped Fast
They had all the parts at good prices. Shipped quickly and showed up exactly as ordered. This is going to be my primary place to get my SmartBMS parts.
13 November 2023
Great product from a great team!
Great pre-sales support answering questions about my LiFePo4 setup. Rapid shipping. Setup was easy and the product itself is full of features that other systems don’t offer.
22 August 2023
Great product delivered quickly
Great product delivered quickly. Asked a cople of questions which were replied to quickly too.
9 June 2023
PostNL briefpost 123smart BMS-USB cable
Ordered 17/03/23 received 14/04/23. Well packed & delivered in expected time frame. Nl-Australia.
Thanks Bill Goodward
16 March 2023
123SmartBMS boards
I bought 123SmartBMS boards. As in the first order I had 2 broken boards, the supplier was very responsive and send another boards to replace the broken ones. Now, the system is working very well. Very good experience with the supplier! I recommend it!
27 December 2022
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