240v battery charger for lithium house batteries
Submitted: Sunday, Jan 03, 2021 at 10:50
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Matthew H8
Hey everyone,
In my van, I am running 500 ah of lithium batteries, in all the rainy weather NSW has been getting recently, my batteries only last 4.5 days without much solar, I have a 1500w 240v PSW inverter, and I recently swiched it to draw off my cranking battery while the car is running, but it wouldnt run my 30amp battery charger, i put an amp meter on my 240v charger and it peaks at 675w on initial startup (60ish amps @ 12v), any idea why it wont run on my inverter? Im contemplating running a generator or dc-dc charger if i cant sort it out
Reply By: Frank P (NSW) - Sunday, Jan 03, 2021 at 11:11
Sunday, Jan 03, 2021 at 11:11
What sort of cabling is between the inverter and the cranking battery?
If it is not big enough for the length of the circuit there will be a big voltage drop during that 60 amp startup which may cause the inverter to stop due low input voltage.
AnswerID:
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Follow Up By: aspiematt - Sunday, Jan 03, 2021 at 15:42
Sunday, Jan 03, 2021 at 15:42
omg, im an idiot haha, i didnt even think of cable size over distance haha, thanks Frank
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Follow Up By: Allan B (Sunshine Coast) - Sunday, Jan 03, 2021 at 19:38
Sunday, Jan 03, 2021 at 19:38
.
Onya Frank.
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Follow Up By: qldcamper - Monday, Jan 04, 2021 at 07:07
Monday, Jan 04, 2021 at 07:07
In my books if you ask people with more knowledge than yourself a question then dont listen to their answer then YES, you are very much an idiot.
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Reply By: Noel L2 - Monday, Jan 04, 2021 at 00:29
Monday, Jan 04, 2021 at 00:29
Generally... you only seem to need 100ah per day.... I get this easy with 800w of solar even on poor weather days.
AnswerID:
634626