48 volts charger/inverter to 24 volt batteries

Felix1964

New Member
Joined
Sep 21, 2021
Messages
2
Hi everyone. I have No experience at all, but keen to learn. Im planning to get a 5 kw system in future, but Im confused about numbers. We consume or use like 5 kw a day, and we were told to buy a charger/inverter at 5 kw and 48 volt, but how can we load 24 volt battery with this unit. Our panels are 2 x 540 watts and 49 max volt per panel.

Thank you ahead. Hope not to ask in vain.

Best whishes from Felix, Denmark
 

NVS

Solar Enthusiast
Joined
Sep 14, 2021
Messages
97
Simply you can't. You need a 48 volt battery.
 

OffGridInTheCity

Solar Addict
Joined
May 23, 2021
Messages
556
Location
Southern Oregon
Hi everyone. I have No experience at all, but keen to learn. Im planning to get a 5 kw system in future, but Im confused about numbers. We consume or use like 5 kw a day, and we were told to buy a charger/inverter at 5 kw and 48 volt, but how can we load 24 volt battery with this unit. Our panels are 2 x 540 watts and 49 max volt per panel.

Thank you ahead. Hope not to ask in vain.

Best whishes from Felix, Denmark
If you take 5kwh/day and divide by 24hrs you get 208w/hour - so you need at least a 250w inverter with a steady 208w/hour all 24hrs. Its HOW you consume the power - e.g. steady or in spikes - that determine the size of your inverter. In my trailer I have a 3000w inverter and consume 5kwh/day but its mostly the mini-split that averages the 200w/hour but can spike up to 1000w momentarily. This gives me an extra 2000w for the microwave (1000w for a few minutes), the 5 gal hot water tank (1200w for 20minutes to heat up for a shower), the hot plate (900w), and plenty for lights, TV, etc. BUT, I cannot everything *all at once* - just need to stager the use a bit.

With regard to 48v vs 24v. As @NVS just said - you MUST match the equipment to the battery :) In your case, you could very well get by with a 2000w inverter and buy something like the MPP LV2424 - https://watts247.com/product/hybrid-lv2424/ and I'm sure you can find a little higher inverter for 24v is you search.
 
Top