So the solar panels are easy, most are 24 volts and I was thinking of installing 3, so I’ll be well over twice the 24 volts.72 volts will likely be my landing place, unless that’s not rec9mmended.
The batteries suggest 46 amps for charge current, because I have 2 batteries in parallel would I be looking to charge at 46 or 92 amps total ?
And which victron solar charger would best suit my build?
72v is great. Once you know the wattage you are settling on, you can work out the correct mppt.
In parrallel for more capacity but aren’t changing the voltage, you double the current. So 92A is correct.
So, with the solar panels the more wattage the faster we can recharge ? Being is my batteries will handle up to 92 amps I think the limitation would now be in the Solar Charger ? Also, I found a 24v build online where they used 2- Orion 12/24 15 for charging from vehicle, are they doing that so they can charge at 720 watts instead of 360 watts? And would that be 60 amps at 12 volts?
Yes more wattage is more power in solar. Or since your space is a premium more wattage per ft sq is what you want.
You can parrallel orions to increase wattage there. Just be sure the alternator can supply the power.in amps…most vehicle alternators are sized barely to run the vehicle and its accessories.
To work out amps for the mppt its (panel)wattage ÷ 24v (battery volts) = amps.
W/V =A
So, if I’m planning on putting a Bluetooth shunt in my build for battery monitoring, do I need the Bluetooth or what’s the advantage of the MPPT with Bluetooth ?
I’m thinking I’ll need a MPPT 100/50
BT allows programming or a quick local check on what happening over instant readout.
If you are planning on using a gx its not totally necessary as you can program over the VRM as well.
It is really a personal preference, some people just don’t want a device broadcasting over what their business is.
The 100/50 is a nice unit, allows about 1200W of solar on a 24v system. You can always over panel a bit to allow for irradiance not being high.
Ok, onto the 12 volt requirements for the RV.Which is more efficient, letting the 120 volt to 12 inverter keep the RV battery topped off, or stepping down my 24 volt power plant to 12 volts to feed the RV needs?