Reddit reviews Battery Voltage Monitor, DROK 0.40'' DC2.5-30V Waterproof Digital Voltmeter 12V 24V Voltage Meter Gauge LED Display Battery Volt Monitor Tester Panel 2 Wires for Solar Panel Lithium ion battery 18650
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DROK battery voltage monitor panel measuring voltage range is DC 2.5-30V, it is a good tool to monitor battery and charging Voltage status of Auto, MOTO, car etc.The digital voltmeter is designed with reversed connection protection, which prevents the meter from being burn when wires are connected reversely.Our voltage meter is moisture-proof, anti-oil, anti-vibration and waterproof(please NOT merge the meter in water).Simply connect the red and black wire to positive and negative Pole of Measured Voltage respectively.Its Decimal point will move automatically according to different Measured Voltage.
Hello from across the strait! Victoria here.
No worries, here are the parts I used:
Fuse Box
[Switches (available in other colours, look at the similar items)] (https://www.amazon.ca/gp/product/B01APBAQSE/)
12V Lighter Ports
Voltmeter
Inverter
Battery Charger (external)
I snagged the last battery charger they had in stock for $50, looks like the price available now is significantly higher. I'd recommend shopping around. Everything else is a basic part, and of course could be easily replaced. Just make sure your switches are rated for the amperage you're going to draw from them, and that the fuses are rated the same or less than the load you put on.
Best of luck, and don't forget to post your build when you're done!