Stationary lead-acid batteries are designed to provide power during a mains power outage. Batteries are capable of maintaining power to the load for both a few seconds and many hours.
Batteries with lead-antimony alloy flat plates have increased specific characteristics. They guarantee long and reliable operation and are virtually maintenance-free.
Batteries are supplied by the company both in a dry-charged state and filled with electrolyte and ready for operation

Technical Specifications OP :

Capacity (C10):
73 Ah to 1,150 Ah
Voltage:
2 В
Continuous charging voltage:
2.23 V/El
Number of charge-discharge cycles:
1200
Delivery type:
Dry version/filled with electrolyte
Features:

Transparent SAN housing
Water refilling every 1 to 3 years
The use of modern filter plugs allows the construction to be explosion-proof and reduces the amount of water refilling.
In the OP series accumulator produced by NovAK a positive electrode contains arsenic-tin ligature and a patented paste composition.
The electrolyte is a solution of sulfuric acid. The density of the electrolyte of a fully charged battery is 1.240+0.010 g/cm3 at 20°C.
Constant charging voltage is 2.23+0.01 V/El at 20 °C.