Hi! I have a off-grid system with Dyness DL5.0 C lithium batteries. The batteries have a built in heating function. The problem is, that when the batteries hit 0 degrees, the allowable charging current from the BMS goes to 0A. We have at least 4 months below 0 degrees. I would at least need a smal…

Hi, thanks for all the responses. The MPPT:s don’t turn off. They produce whatever the system uses directly (~10W for Cerbo and internet router) but batteries don’t charge at all under 0 celcius. BMS gives a notification “BMS disabled charging” and CCL drops to 0A at 0 celcius. @pau1phi11ips @Fider…

Well, that’s a bummer. I hope you can get Dyness or the distributor you purchased them from to tell you how the heating function works. But, you’re not alone in having to worry about cold temperatures. You are quite a bit further north than most of my customers, but we have to contend with temperatu…

Hi and thanks again, this is all interesting to hear. Lithium batteries have not been used here in off-grid systems before. Mostly because of the climate, the need for heating and the fact that customers and installers are afraid to put the new technology in cold off grid sites. Now we are getting …

Have you had the case open? Is there any sort of settings interface like UART or Bluetooth? AFAIK heating should just be a power cable that will heat up the batteries with induction. They are usually just controlled by the internal BMS, and external power is fed through a power line that is always …

Hi, I haven’t opened the Dyness battery. There is a setting interface directly on the front panel, but there is no documentation on how to access the device. Webasto and other diesel heaters are great for cold climate off-grid systems, and we use them a lot with remote control to heat the cabin/ho…

Oh but then use the cerbo to start the generator. If it’s on then it can provide power to the heater before charging the bank.

We use these 20W heating pads when we have to provide external heat to batteries: Amazon.com: 4 Pcs Silicone Rubber Heating Pad, Heating Blanket Flexible Silicone Heater Mat Rubber Heating Blanket for Industrial Equipment 20W 12V : Tools & Home Improvement I hope that link works for you. If the out…

I have insulation all around. And my heating elements are stuck directly on the cells for best efficiency. You should have a look inside your batteries, chances are there are already heating elements in them. The generic ones like that usually do. According to the data sheet they have heating. …

Yes, which is why I pointed to the datasheet that says they are indeed heated. So just use that.

Controlling Dyness battery heating with Victron

Q&A and troubleshooting

nickdb (Nick) 9 January 2026 18:02 14

As a victron forum we encourage best practice.
Cracking a commercial battery without support from the manufacturer will ruin your warranty.
Best to not give advice that could have expensive consequences for the owner.

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Controlling Dyness battery heating with Victron

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