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NLR - Rolls Surrette Battery - 4V (4KS21PS)


Out of Stock

SKU: 4-KS-21PS

The Rolls Surrette 4KS21PS (4-KS-21PS / 4KS-21PS) is rated at 1104 amp Hrs. @ 20 Hr. rate. The 4KS21PS (4-KS-21PS / 4KS-21PS) is a practical expansion of the Roll's New Generation Dual-Container 4 Volt line. Using the famous Rolls Surrette KS plate, this battery offers higher capacity and less watering due to fewer cells per string. The KS plate batteries have a reputation of 15-20 years expected life.

Warranty is 10 years (first 36 months replacement, next 84 months pro rated).

For a Single String 1104 AH Bank, you will need 3 of the 4KS21PS (4-KS-21PS / 4KS-21PS) for a 12 Volt System, 6 of the 4KS21PS (4-KS-21PS / 4KS-21PS) for a 24 Volt System and 12 of the 4KS21PS for a 48 Volt System. Each additional string will multiply the AH.


Model ROLLS 4KS-21PS
Voltage 4 Volts
Capacity @ 25 Amps 3575 Minutes
Amp Hours / 100 hr 1557 AH / 15.57 A
Amp Hours / 72 hr 1468 AH / 20.39 A
Amp Hours / 50 hr 1358 AH / 27.16 A
Amp Hours / 20 hr 1104 AH / 55.2 A
Amp Hours / 5 hr 740 AH / 148 A
Length 15 3/4" (400 mm)
Width 9 3/8" (238 mm)
Height 24 3/4" (464 mm)
Weight 267 lbs (121 kg)

This product is shipped from one of our warehouses in Northern California. Orders placed after 12 p.m. will typically ship the following business day. To see an estimate of our delivery times, click here.

Returns & Replacements
Products can be returned for a refund within 30 days of receipt if unused and in original packaging. Returns are paid for by customer unless product is defective or damaged, in which case Real Goods assumes responsibility. Please use Fedex, UPS, or USPS with tracking, for returns.

Returns of solar panels, inverters or other large ticket items will incur a re-stocking fee of up to 20%. Freight shipping is non-refundable.

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