A new electrical system
Design of a new 12v electrical system with upgraded components and better monitoring.
I'm currently redoing my electrical system after my initial design failed due to some parts not up to spec. This time I'm going to over-engineer things and build for future expansion.
Existing components #
Kings 12V 138AH Deep Cycle AGM Battery
- Battery Type: Deep Cycle VRLA AGM
- Battery Chemistry: Maintaince Free Lead Acid
- Lead Grid Purity: 99.7%
- Nominal Voltage: 12V
- Nominal Capacity (C20 to 10.5V): 138Ah
- Cycles at 30% Depth of Discharge: Up to 1800
- Cycles at 50% Depth of Discharge: Up to 1000
- Charge Voltage @ 25°C: 14.5-14.7V (-4mV/ °C / cell)
- Float Charge Voltage @ 25°C: 13.5-13.8V (-3mV/ °C / cell)
- Max Charging Current: 41.4A
- Internal Resistance (Fully Charged): ~6.5mΩ
- Max Discharge Current (5 Seconds): 1100A
- Self Discharge Rate (Per Month): <3%
- Operating Temperature – Discharging: -10°C to +40°C
- Operating Temperature – Charging: -10°C to +40°C
- Operating Temperature – Storage: -20°C to +40°C
- Terminals: M8 Threaded Copper with Colour-Coded Sealed Epoxy Blocks. Positive Left Hand Side
- Hardware included: 2x M8 Bolts 2x Flat Washers 2x Spring Washers
- Handle: Integrated Plastic Handles
- Case Material: ABS
- Dimensions (LxWxH): 408 x 176 x 232 mm
- Weight: ~35kg
- Warranty: 1 Year
Kings MPPT Solar Regulator 20A
Kings 240W Folding Solar Blanket 20A @ 12V
Potential future components #
I want a battery monitor so I can run my electric engine with less guesswork about range.
Victron seem to be well regarded. e.g.
SmartShunt with bluetooth interface.
ITechworld is neat and cheap ITECHBM500 - 500A Battery Monitor With Shunt