Re: Heart interface
Reply #4 –
On small wattage solar systems (small relative to the battery size) they typically don't install a charge controller since there's no risk of overcharging and burning up the batteries.
Using voltage to determine your battery level is considered to be too difficult and inaccurate for most boondockers. Most use a meter that measures amp-hours. I use the Trimetric like Dave. There's a lot to learn on this subject. A good source is: Poop Sheets by phred He hasn't updated it in years but the basic principles don't change.