Electrical
LiFePO₄ across 10 × 12V WattCycle 100Ah bluetooth (internal BMS) batteries. 9 are in the main house bank, one is dedicated to the Electroscan macerator ("electropooper").
Three different capacity numbers are all valid for different things:
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House bank nominal: ~10.8 kWh (9 × 100Ah × 12V)
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Total system nominal: ~12 kWh (includes the 10th battery dedicated to the Electroscan)
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Actual realized: ~11.5 kWh per BMSes when fully charged — not all batteries reach a true 100Ah. This is the right figure for power-budget math (see Jimmy-Shower).
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Main house bank is in starboard salon (relocated from lazarette — see Interior for rationale & layout)
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Main house battery box is King StarBoard
A single AGM starter battery in a battery box under the engine bed (Interstate 27M-XHD, 100Ah).
- Balmar 120A with MC-618 external regulator
- Serpentine belt conversion on the Yanmar 4JH2E
- Currently only feeds the starter battery (oversized for a single AGM)
- Planned addition of a Victron DC-DC charger to feed the house bank.
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SG200 Battery Monitor Kit (Balmar)
- SmartShunt: 350A continuous, 12V-48V compatible
- Color Display (2.0625" cutout, IP65 front-rated)
- Bluetooth Gateway (SG2-0300) for mobile app access
- SmartLink network supports up to 32 devices
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MC-618 Regulator (upgrade from MC-614)
- External regulator for Balmar alternators
- Configurable charge profiles for LiFePO₄, AGM, flooded, gel
- Temperature compensation
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Configuration notes:
- Chemistry: LiFePO₄ (code 05)
- SmartShunt mounted in dry location, close to battery bank
- All loads/sources must terminate at or before the "CABLE" end of shunt
- Aux voltage leads (AUX-1, AUX-2) for starter battery monitoring
- Fuse required on 60" positive power lead (within 6" of battery)