SKU: 32712578773

Mastervolt Bi1203 Bi Series Battery Isolator 120 Amp 3 Battery

Sale price$103.05 Regular price$114.50
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Description

Mastervolt Bi1203 Bi Series Battery Isolator 120 Amp 3 BatteryMastervolt BI 1203 AS Battery Isolator Model: 83012031 Battery isolators that divide your charge current with a minimum energy loss. The Charge Mate for connecting and or disconnecting two batteries. Battery Watch for monitoring the condition of your batteries (also usable as main switch). Onboard systems usually consist of two or more batteries that function independently when powering the 12 or 24 V consumers. These batteries require independent

Mastervolt BI 1203-AS Battery Isolator

Model: 83012031
  • Battery isolators that divide your charge current with a minimum energy loss.
  • The Charge Mate for connecting and/or disconnecting two batteries.
  • Battery Watch for monitoring the condition of your batteries (also usable as main switch).

Onboard systems usually consist of two or more batteries that function independently when powering the 12 or 24 V consumers. These batteries require independent charging with reliable battery isolators or battery combiners.

Mastervolt’s BI battery isolators are based on conventional diode technology. The diode voltage drop (ca. 0.6 V) can be compensated for by adapting the output voltage of the connected charger or alternator. Mastervolt Mass battery chargers and Alpha Pro charge regulators are standardly equipped with automatic voltage drop compensation.

The Mastervolt BI battery isolators are compact and fully solid state, preventing wear. The weight varies from 580 to 1300 grams.

Completely corrosion-proof material with aluminium heat sinks. The electronic components are encased in synthetic materials, the BI models have molded diode splitters.

The synthetic end plates feature connection lugs, the solid bolt connections with nuts and locking rings ensure easy installation.

Specifications
General specifications
Number of battery outlets 3
Dimensions, hxwxd 8.1 x 5.5 x 3.1 inch
Weight 2.9
Technical specifications
Max. output battery charger 80 A
Max. output alternator 120 A
Compensation diode Yes
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32712578773

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4.5 ★★★★★
Based on 13 reviews
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Verified Purchase
Cathy H.
Massapequa, US
★★★★★ 5
Perfect over a picnic table!
Size: 6.5x10ft, Color: Lake Blue
Great umbrella. We used it over a rectangular picnic table and the shape was perfect. Love the color too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
M
Verified Purchase
M. Sheehy
Lowell, US
★★★★★ 4
Attractive and seems like it will hold up
Size: 6.5x10ft, Color: Blue-Green Stripe
Seems sturdy enough. Tilt button is difficult to retract to straight, but maybe just my finger strength, or it will loosen up with time. The color of one of the stripes is off from the photo. I was hoping it was turquoise as shown in picture, but is actually a much deeper blue. Doesn't coordinate with my other patio colors like I hoped it would, but it will do.
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Reviewed in the United States on April 8, 2026
C
Verified Purchase
ctrygirl
Lowell, US
★★★★★ 5
Would recommend
Size: 6.5x10ft, Color: Dark Blue
Love the rectangular shape, it allows more coverage in areas that I need it. The tilt feature works well and is handy. Easy to put together and would recommend
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Reviewed in the United States on April 21, 2026
P
Verified Purchase
Paige Fontaine
Fort Morgan, US
★★★★★ 5
Nice umbrella! Get it!
Size: 6.5x10ft, Color: Navy, Size: 6.5x10ft, Color: Navy
Really love the umbrella! Covers the table and is made well. At this price, we can buy one every spring.
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Reviewed in the United States on May 16, 2026
J
Verified Purchase
J R Smith
Houston, US
★★★★★ 5
Assembly great!
Very good item. Good structure and easy to assemble
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Reviewed in the United States on May 22, 2026

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