Yeah I mean the pumps clearly do run on 12VDC. Almost every guide you see online about Jebao battery backup feeds 12VDC straight into the controller. There also have been mixed reports of pumps failing when running on 12VDC continuously(something some users attempt to do on a long-term basis to throttle them). But, it's hard to say if these pumps were just destined to fail anyway or if the 12VDC caused it.
From a cost perspective, it would definitely be nice if they could run on 12V indefinitely. Complexity would also be reduced if I could feed 12V directly into the controller. It would also make the system more robust if there was no 12V > 24V step up circuit to potentially fail.
I just don't know if for the sake of longevity it's good to run these pumps on 12VDC.
No. IMHO , they just fail from time to time. I’ve had them for long enough to know. The little power supply is woefully under built for one. The quality control is horrible , same date of purchase , one fails not the other one.
I switched to much larger amperage 24v supplies and get better performance and fewer failures.
But still, they slow down.
I’ve actually been contemplating the same backup problems for the long term.
It’s honestly just easier to make the backup 24v. Or a 12v and buck up if you need. Pretty much choose a standard for the tank use and a supply. I’m pretty much all 24v dc now and each tank runs on one supply.
For me Two batteries and a 24v Charger in ac. When the power goes out it runs off the batteries. Seemed too simple but it is.
I have no need for ac in my tanks (light and heater ) so no large inverter needed. San Diego gets “cold “ for three months.
We talked a bit about it here.
https://www.reef2reef.com/threads/d...ckup-for-your-reef.366009/page-8#post-5017016