User manual

G3-Combi
Page - 20
Clayton Power GmbH
ANNEX A INFORMATION ABOUT ACID-BATTERIES
WARNING! Working with batteries is dangerous!
Batteries generate explosive gasses!
Therefore it is of outmost importance that each time you serve equipment in the vicinity
of the battery, to follow the battery instructions very accurate. Never smoke or allow a
spark or a flame in the vicinity of a battery.
1. Choosing the best battery
Lead acid batteries are the best choice for general applications; they are easy and
uncomplicated to use and their performance to price ratio is superior.
The batteries are available in many different types, sizes, ampere hours (Ah), voltages and
chemistries.
Lead acid battery types
 Starting batteries - These batteries are designed for high discharge in very short time
(1~2 min.) and only used for cranking purpose. Not recommended for inverter applica-
tions. They will not damage the inverter but the problem is, that these batteries will not
last in deep cycle applications.
 Deep-cycle batteries - Recommended for the inverter applications. The deep-cycle
batteries are designed for applications where high discharge rate is needed. They can
be discharged up to 80% of rated capacity without being damaged.
1.1 Battery sizing
The batteries are the inverters energy source. The larger the batteries are, the longer the
inverter can operate before recharging is necessary.
An undersized battery bank results in reduced battery life and disappointing system
performance.
 The leading cause of premature battery failure are wrong or too less battery-capacity,
improper charging and poor battery maintenance.
Note: In general do not discharge the battery more than 50% of rated capacity. Discharging of
80% is acceptable on a limited basis, such as a prolonged utility outage. Total discharge
of battery will result in permanent damage and reduced battery life.
Note: Batteries discharged at a low rate will be able to deliver a higher capacity than those
discharged at a high rate
Estimating battery requirements (VOLT x AMPS = WATTS):
The watt ratings of each appliance powered by inverter must be added together. Use the figures
from the nameplate label on the appliance.
Multiply the Ah with 2 to reach the recommended battery Ah size. This will also allow the
battery to be cycled only 50% on a regular basis.
Total watt consumption (W) x Running time (Hours)
Needed battery capacity (Ah) =
Battery voltage (V) x 0,9 (Eff.)