Joseph Vilvaraj 0 Posted August 12, 2022 Need to run CCTV DVR and camera on 12v battery can I connect the DVR and camera ( both marked as 12v) directly to a charge controller my issue is when the battery is fully charged the battery/charge controller voltage is 14.4v and when the sun is up has damaged my DVR during this time. Connecting to the battery directly works but i have no control over the DVR draining the lead acid battery Share this post Link to post Share on other sites
Mark_M 3 Posted August 13, 2022 Most charge controllers do not output exactly 12v, as you have said. This is where you would use a 24v solar system and a voltage regulator device set to output 12v. Using a 12v regulator device on a 12v solar system can be done, but it will turn off if the input voltage drops below a threshold, e.g. 12.5v (refer to the specifications). The input on these regulators always has to be higher than the output voltage. Share this post Link to post Share on other sites
Joseph Vilvaraj 0 Posted August 14, 2022 Thank you we agree. But we cannot use 24v. is there any other device supply 12v. for example.Car DC 12V 4A Voltage Stabilizer Surge Protector Power Supply Regulator for Auto Truck Vehicle Boat Solar System etc.(DC10-36V Input, DC12V Output) On 8/12/2022 at 8:27 AM, Joseph Vilvaraj said: Need to run CCTV DVR and camera on 12v battery can I connect the DVR and camera ( both marked as 12v) directly to a charge controller my issue is when the battery is fully charged the battery/charge controller voltage is 14.4v and when the sun is up has damaged my DVR during this time. Connecting to the battery directly works but i have no control over the DVR draining the lead acid battery Share this post Link to post Share on other sites
tomcctv 190 Posted August 14, 2022 Hi yes the simplest way is a voltage regulator and connect dvr and camera to regulator output is this for home or vehicle Share this post Link to post Share on other sites
Joseph Vilvaraj 0 Posted August 14, 2022 I selected this. Please confirm. The battery is 12V max charge voltage 14.4 load cut off voltage 12.2vhttps://www.amazon.co.uk/gp/product/B06Y5JHZG2/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1 Share this post Link to post Share on other sites
tomcctv 190 Posted August 14, 2022 Hi yes that is it BUT on install I would put an inline 2.5 amp fuse from the battery side (red) Share this post Link to post Share on other sites
Joseph Vilvaraj 0 Posted August 15, 2022 Did you mean the solar charge controller side. The regulator will be connected to the solar charge controller and the DVR and camera in the output of the regulator. Why 2.5A DVR and 6 cameras could draw about 3A Share this post Link to post Share on other sites
Mark_M 3 Posted August 15, 2022 On 8/14/2022 at 7:30 PM, Joseph Vilvaraj said: Thank you we agree. But we cannot use 24v. is there any other device supply 12v. for example. Does the system need to work at night? A batteries voltage drops as power is drawn from it. Once the battery goes below 12, the 12v regulator will stop working and your cameras will turn off. Share this post Link to post Share on other sites
Joseph Vilvaraj 0 Posted August 15, 2022 Did you mean the solar charge controller side? The regulator will be connected to the solar charge controller and the DVR and camera in the output of the regulator. Why 2.5A DVR and 6 cameras could draw about 3A Well spotted. yes, the DVR has to work at night. We have set the load cutoff voltage on the change controller to 12.1v. But worked out and provided one 1-day extra capacity on the battery and I expect to work above 12.2 v on the battery. I still have to test the regulation to see how it will behave when the input( battery ) voltage goes down to 12.1 or 12.2 but not below 12.0v. I do not expect to work below 12v Share this post Link to post Share on other sites
