PLANET BSP-300 - Manual (Page 30)

User’s Manual of BSP-300
29
acceleration power. Please do not use this type of battery unless you have no other types of
batteries to use. If this type of battery is use in the cycling system, it will be less durable and will be
easily damaged.
Maintenance Free Batteries
­
This type of battery is commonly used in cars or ships, but rarely used in PV systems. This type of
battery is usually equipped with a reserved additional liquid electrolyte without the need of
electrolyte replenishment, which is different from the sealed battery.
Deep Cycle Batteries
This type of battery is the most suitable for use in the solar system. They can have many different
dimensions and formations. The most common is the non‐sealed electrolyte batteries.
A non‐sealed lead‐acid battery has a cover which should be periodically removed for the visual
confirmation of the level of the electrolyte. When the level of the electrolyte is too low, you may
need to replenish it with distilled water under the fully‐charged condition. However, if the distilled
water is added when the level of the electrolyte is too low but the battery is not fully charged, it may
cause electrolyte overflow. Furthermore, only distilled water can be added into the electrolyte. If
the water containing other impurities is added into the battery, it is very likely to reduce both the
efficiency and the lifespan.
Sealed Batteries
Another type of battery is sealed with rubber. This type of battery does not use the battery cover
and the electrolyte is glue instead of liquid allowing the battery to be fixed at any location. This kind
of battery has the advantages of no need to replenish the electrolyte for maintenance, a long life
up to 800 cycling times, and a lower self‐discharge.
Lithium Batteries
This type of battery uses lithium metal or lithium alloy as the anode and uses the non‐aqueous
electrolyte.
Because lithium has a very active chemical property, the manufacturing, storage and use of lithium
require very strict environmental requirements. As a result, the lithium battery has lacked
application for a long time. As the development of micro‐electronics technology at the end of the
twentieth century, the number of miniaturized equipment is increasing which sets very high
requirements of the power supply. Thus, lithium battery technology enters the stage of large scale
practical use. Since the specifications and conditions of lithium battery are special, please be sure