Aquarium heater on Kraken

[Izzy’sReef]

Hi everyone I was wondering if anyone has found an aquarium heater which can be plugged in directly into the kraken 24v force ports with the corresponding 24v cable? In my area we are about to experience some freezing temperatures and I was worried about power outages. I will be adding a sealed lead acid battery to my system for back up and was having a hard time finding any thermometers that come in the proper end cable adapter to fit into the kraken force port cables. Most thermometers that I have seen come in the standard 3 prong cable plug in.

 

[Carlos]

It is neither optimal nor cost-effective. If you were to run a 500W heater at 24V, it would draw just over 20A. Technically, the ONE heater would draw more than the Kraken can supply. That's why you don't see DC heaters. The lower the voltage, the higher the amperage draw.

 

[Izzy’sReef]

This makes sense Carlos, I guess in an extended power outage I would need to pull out my generator.

 

[JeffB418]

Kraken is great for emergencies to keep flow going (number 1 important thing in a power outage situation). Heaters are def more of a generator thing. You can go much longer without heat over flow.

 

[Izzy’sReef]

This is my test run on low power mode with just pumps running at 50% which I know is high but I wanted to make sure I could see water moving to confirm my pumps were on. Based on these screen shots can anyone tell me how much power I’m using?

 

[Frank Li]

Basically nothing (0.23amps) assuming that is showing the constant draw and you disconnected the AC (the negative battery current suggest it is charging the battery so current readings may not be correct), at that rate you will get a little over 4hrs run time for every 1AH you have in battery capacity (in lithium chemistry anyways). So a typical cheap 100AH LiFePO4 battery will last 18 days. Have another look at the kraken DC Current for a while and note the peak/max current you see, and then divide your battery capacity by that number (in amps) to get approximate run time.

When you drop back to 12V, remember your 24V pumps have already dropped back to 50% output due to drop in voltage, so reducing the speed further in your case is probably pointless as your lack of power draw means you probably don't have much benefit trying to extend the run time further (assuming you bought battery of more than 20AH).