What size power inverter can a 80w solar panel supply power to.?

Question

can i use a 1200w inverter on a batery charged by a 80w solar panel

Answer 1

The 80 watts is what the panel can provide at any instant. If over a period of time it supplied enough power to charge a storage battery to over 1200 watts then the answer is yes. By itself the answer is always no.

That charging will take 15 hours to give 1200 watt hours to the battery. And of course if you pull out the 1200 watt hours from the battery using the inverter then you will need more recharging, so in the long run you can only put about an 80 watt load onto the inverter.

Answer 2

Do the math..

80 watts at 12 volts = 6.6 amps (if you get a 12 volt module)

You need to charge the battery at a 10% charge rate, the battery size would be 66 amp-hour.

The 1200 watt inverter at 12 volts will pull from the battery 100 amps to run the load. You need a min of two times the battery power just to start that large of a load. So 200 AH in batteries or the inverter will shut down the minute you put a load on it because of low voltage.

So now you know you have to have a 200 AH battery bank and 10% of that is 20 amps. You can get away with 5% but will charge slow.

20 amps times 12 volts is 240 watts in solar modules and that is only if you are using an MPPT charge controller. Solar modules are not 12 volts they are more like17 or 33 volts. The batteries are the stronger of the two and will pull the 17 or 33 volts down to 12 volts so you loose the amps of that other 5 or 21 volts and end up with more like 15 or 5 amps or a less.

There is a little more to it then just wiring it together and watching it go.

Answer 3

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Answer 4

80w Solar Panel

Answer 5

Yes. The 1200W rating is just to tell you that it can supply up to 1200W to the load it outputs to. Keep in mind that if the solar panel is the only supply for the battery, you're going to be very limited in how quickly you can replenish the battery if the inverter is loaded heavily or constantly.

Answer 6

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Answer 7

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