expiredJD713 posted Mar 09, 2026 10:08 PM
Item 1 of 2
Item 1 of 2
expiredJD713 posted Mar 09, 2026 10:08 PM
ECO-WORTHY 5KW Solar Inverter 48V DC-120V/220V AC Split Phase Off-Grid (Free Ship) $439.99
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Now compare that with a 75 kWh EV battery.
Charging a 75 kWh car with 5 kW solar (5 sun hours)
75 ÷ 25 = about 3 days
✅ Result:
Real-world adjustment
Because of inverter losses, charging losses, and weather:
Example EVs with ~75 kWh batteries
Quick rule
With 5 kW solar and 5 sun hours:
For people use for house backup, you could hardwire directly to breaker panel box. Or like I did, install NEMA POWER BOX direct to 50 AMP BREAKER MAIN PANEL BOX.
Screen shot: https://ibb.co/7twW8FNB
I saw this deal small portable power station sale $153 with 512Wh. You could use this for UPS small device like computer, router, and etc.
https://slickdeals.net/f/19271337-600w-ac-output-segway-lumina-500-portable-power-station-solar-outdoor-generator-152-99-free-shipping?src=SD
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https://www.eco-worthy.com/produc...JEEALw
See the response from Eco-worthy here: https://diysolarforum.c
I saw this deal small portable power station sale $153 with 512Wh. You could use this for UPS small device like computer, router, and etc.
https://slickdeals.net/f/19271337-600w-ac-output-segway-lumina-500-portable-power-station-solar-outdoor-generator-152-99-free-shipping?src=SD
You could get this "DC HOUSE 1200W Pure Sine Wave Inverter Charger" sale on Amazon $145 right now. This inverter and charger in one for 48v battery, and it also have 120V UPS FUNCTION like you want. This inverter is must easier to install and use. You just add battery to it.
DC HOUSE 1200W Pure Sine Wave Inverter Charger:
https://www.amazon.com/dp/B0DWJZD...hcmVk
You could get this "DC HOUSE 1200W Pure Sine Wave Inverter Charger" sale on Amazon $145 right now. This inverter and charger in one for 48v battery, and it also have 120V UPS FUNCTION like you want. This inverter is must easier to install and use. You just add battery to it.
DC HOUSE 1200W Pure Sine Wave Inverter Charger:
https://www.amazon.com/dp/B0DWJZD...hcmVk
Sign up for a Slickdeals account to remove this ad.
Can you tell me when your FREE ELECTRIC start/end? So I could calculate how must battery you need. At night time, you could use your home electric to run your server and charge battery. Day time no free electric, you use the battery to run your server. This way, you could save your money on battery. And basically, you run your server for free, no more pay for electric.
Or you just want to run 24 hours on battery? To do this, you need at least 10kw battery to run whole day like we calculated. So you could buy 2 x 100ah 48v batteries to get you 10kw.
100ah x 51.2v = 5120 Wh per battery
The DC HOUSE INVERTER CHARGER has only 15AMP CHARGING. 200 AMP / 15 AMP = 13 HOUR 20 MINUTES to fully charge the batteries. So do you have more than 13 hour free electric? If you do, then that perfectly with DC HOUSE 1200W INVERT CHARGER. If not, you need to UPGRADE a higher inverter charger "DC HOUSE 2000W Pure Sine Wave Inverter + 48V 25A Lithium Battery Charger". The higher 25AMP CHARGER could charge 200 AMP batteries in 8 hours.
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