====== Chargers with voltage sensing ======

Higher charge/discharge current can distort the voltage the charging source "sees" at that source's BATT terminals.  For example, if the battery battery bank is actually 13.0v and the charger is putting out a lot of current the battery voltage might appear (to the charger) to be 13.4v.  From the bank's point of view it's voltage //sag//.  From the controller's point of view it's voltage //rise//.  ((It can also happen on disccharge, but the LOAD outputs on the controller are rarely providing so much current that the voltage sags))  This effect is aggravated by undersized wiring or poor connections. 


To limit this effect some chargers use a separate //voltage sensing//((or "battery sensing")) circuit to get a more accurate reading of the bank voltage.  The sensing circuit is not affected by voltage distortion because //the sensing current does not carry significant current//. 


Do not assume your charger has a separate voltage sensing circuit;  read the documentation carefully.  By definiteion, some kind of remote sensing will be required (wire, dongle, etc)  
===== solar =====

The **Victron** line uses the [[https://amzn.to/3DqCqGd|Smart Battery Monitor]], [[https://amzn.to/3wH0gKe|Smart Shunt]], [[https://amzn.to/3Y9rFQK|Smart Battery Sense]] to send voltage info via bluetooth to [[https://amzn.to/3XNCvfo|SmartSolar controllers]] (built-in BT) and [[https://amzn.to/3wEROuJ|BlueSolar controllers]] (using an add-on [[https://amzn.to/3wBAzKS|BT dongle]]).  

Most other controllers with voltage sensing use dedicated sense wires, which are often just plain wire.  Some controllers have special connectors which might require a proprietary sense wire (see below).

{{ https://cdn11.bigcommerce.com/s-fhnch/images/stencil/500x659/products/1704/21107/product_appearance__71728.1647589912.jpg?125}}
The **Renogy** line uses a sense wire [[https://amzn.to/3HFqL8Y|like this]] to send remote voltage info to these controllers:((https://www.renogy.com/battery-voltage-sensor-with-battery-ring-terminals/))


  * [[https://amzn.to/40eewYo|Adventurer Li 30A]]
  * Rover Li ([[https://amzn.to/3HheXIH|60A]], [[https://amzn.to/3WNB6UD|100A]])
  * Rover Elite ([[https://amzn.to/3jceijR|20A]], [[https://amzn.to/3JlMfsT|40A]])



===== DC-DC =====



===== combo solar and DC-DC =====

Renogy

  * [[https://amzn.to/3HhiJBU|Rover Boost 10A]]
  * DCC-series DC-DC chargers ([[https://amzn.to/3XL3VSR|30A]], [[https://amzn.to/40dpWeJ|50A]])