Sundaya provides 3 types of 12VDC storage solutions to build Economy, Standard or Deluxe Decentralized Power Solutions:

Apple

The Apple is the cheapest solution to install a Decentralized Power Solution, with a separate battery to store the generated electricity. Although the “Apple Solution” is in many countries the most often used installation concept, Sundaya does not really recommend this solution because the battery will normally be located unprotected somewhere on the floor, becoming a potential hazard to children playing around it, or causing other possible dangerous situations.

Another frequent problem is that batteries are very often abused by its users because the controller can easily be bypassed. Sundaya introduced the S3 and recently the S4 concepts to integrate management electronics and battery in one casing and in this way counter the earlier mentioned problems.

S3 (Sundaya Storage System)

The S3 is a 12VDC integrated storage system, with built in charge electronics and control panel. The S3 has become the standard in countries where sales of solar systems is taking place on commercial basis with consumer finance, and thus there where end-users decide what products to buy. The long reliability-track-record of the product since introduction in 1993 and the attractive price makes the S3 your best choice.

The figure behind the code S3 (for example S3.600) represents the maximum Watt-hour capacity of the storage system. In case of a PV Solar power system for daily use we recommend to use a solar panel that provides maximum about 1/3rd of the capacity of the storage system.

For an S3.600 this means that you should connect a solar panel that provides 200 Watt-hours per day.

S4 (Sundaya Smart Storage System)

The S4 is a completely sealed portable Storage System. The S4 is unique in the industry because of its smart electronics, and the fact that it is completely maintenance free.

The electronics are unique because it protects the battery from “user abuse” through the FHI® algorithm. (see animation: Advanced function of the charge controller) The most common factor of battery failure in Solar Systems is due to Users who never allow the battery to get fully charged. The S4's microprocessor takes care of that; under whatever usage behavior of the User, the battery does get fully charged, minimum once in 10 days, ensuring a long lifetime of the battery.