The Lumacell Smart Diagnostic micro-controller boards hall supply the rated load for a minimum of 1/2 hour to 87.5% pf the rated battery voltage. The unit shall be rated 120V or 347V 60Hz and be CSA listed. The charger shall be fully computer tested and its charge voltage factory set to ± 1% tolerance. Chargers with field-adjusted potentiometers are not acceptable. A pulse-type charger shall be employed to promote long battery life and reduce the potential for grid corrosion. The charger shall provide a continuous high charge to recharge the battery, when the battery is at full capacity, the charger will shut-off.