So ive got a 72 volts 10 amp E bike & charger = 720 x 6 hours of charge = 4300 wh.
Is this really how power hungry ebikes are or is my math not mathing?
Im running 2 victrion 250 / 100 mppt’s with 8 400 watt solar pannels. Currently running 2 300 AH lifpo4 batteries in series = 24 volts. Im using a 24 1200 va inverter. Will the inverter handle that kind of load for that amount of time?
Ok so i figured out my mistake. 10 amps x 72 volts is 720 watts x 6 hours of charging = 4320 watts.
Ok that makes alot more sence. So my Victron system will charge my E bike in its current configuration. 2 300 ah batteries in series is 7200 watts so will a 24 1200 VA inverter charge that for that long even though its only 1000 watts?
Your units are a bit off, but generally the calculation is correct.
Your batteries hold 300Ah, if you put two in series then the system voltage will be 24V.
This means the system has stored energy of 300Ah x 24V = 7200Wh or 7.2kWh
Your charger can charge at 72V and 10A. That does not necessarely mean it outputs that current all the time, especially at the end of the charge cycle the current will taper towards zero. But i guess for this example we can use your calculated 4320Wh or 4.32kWh
So in theory your setup can fully charge the bike once, but on the second charge your 24V batteries will be empty first. In reality i would not try to charge a second time, since deep discharges tend to eat into the lifespan of the batteries.
To the inverter, a 1200VA inverter should be able to power a 720W charger. But if that actually works in real life is hard to predict. It heavily depends on how nice the two devices interact with eachother.
As for the time, that should not be an issue, as long as the inverter has room to breathe, means that the hot air can escape and is not trapped in some small space
Yeah im running 8 cabinet fanz to cool everything. So far it works good.buy I havnt tested it with larger load yet so we’ll see. As far as charging E bikes the. I could always alternate days..yeah I don’t like totally discharging my batteries eatber. As long as the 24 200 VA an ha.dle the constant load im happy. Thanks for confirming that. 
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Oh yeah as far as my system being lopsided, I run 2 mppt’s currently i have 2 breakers so I only run 4 pannels but can run 8 if i have large loads for a long time. I usually just run 4 pamnels with the current battery bank. Im building it to easily upgrade. Soon I plan to 2s 3p = 6 batteries at 24 volts = 900 Ah = 21.6 kwh thats why Ive got my system lopsided atm. I can also paralell 4 more pannels if I need to but I think the current set up is actually over panneld enough actually. But yeah I plan to run a dual phase 6000 watt inverter. ive run 0/4 awg cables and 400 amp busbars eventually but for now the 24 1200 va should do everything I need atm.
