We are on a 48 volt PV system using 2 strings of Interstate L16 batteries in use since 2006, off grid in Colorado.
Most years we have not used the system for several months during winter.
The batteries have not run dry, have been equalized regularly with a large genset and the sun.
Is there a definitive test to determine whether the batteries can supply the rather modest power demands we have, including running a 220volt well pump and refrigerator. They do not function as new, drawdown is quick and cloudy days see lower voltage readings, however with care we are able to maintain over 48 volts reading
Most years we have not used the system for several months during winter.
The batteries have not run dry, have been equalized regularly with a large genset and the sun.
Is there a definitive test to determine whether the batteries can supply the rather modest power demands we have, including running a 220volt well pump and refrigerator. They do not function as new, drawdown is quick and cloudy days see lower voltage readings, however with care we are able to maintain over 48 volts reading
Comment