Ignitions and Electrical› Charging Systems

MASTERVOLT

BI 1203-S

$310.16

SKU: M06H 83012031

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Mastervolt BI 1203-S is a battery split charger/isolator designed to provide independent charging for up to 3 batteries. It utilizes conventional diode technology, which results in a diode voltage drop of approximately 0.6 V. This voltage drop can be compensated for by adjusting the output voltage of the connected charger or alternator. The unit is constructed from corrosion-proof materials, with all electronic components encapsulated in synthetic materials, making it compact and fully solid-state to prevent wear.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMASTERVOLT
Part NumberM06H 83012031

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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