How to increase solar panel output amps

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  • SunEagle
    Super Moderator
    • Oct 2012
    • 15126
    #46
    Originally posted by solisd2020
    Hello,
    I have a basic solar panel system consisting of two solar panels with charge controller (MPPT) and inverter, everything was working fine until today I started the angle grinder and then the inverter shuts off, I touch the back of the solar inverter and it's somewhat warm, then I turn on the grinder again and it shuts off again, any advise?

    Thanks.
    MY guess is that the grinder pulls down the battery voltage (you did not mention the size of the battery or panel wattage) below what the inverter is looking for.

      Comment

      • solisd2020
        Junior Member
        • Apr 2022
        • 2
        #47
        I'm sorry I am new at this, I also plug in a jigsaw with same results, I've got two (12v) batteries connected in such a way to stay with 12v. My two solar panels are worth 200 watts. and I have a 3000 watt Power inverter. Thanks.

          Comment

          • SunEagle
            Super Moderator
            • Oct 2012
            • 15126
            #48
            Originally posted by solisd2020
            I'm sorry I am new at this, I also plug in a jigsaw with same results, I've got two (12v) batteries connected in such a way to stay with 12v. My two solar panels are worth 200 watts. and I have a 3000 watt Power inverter. Thanks.
            Well unless those batteries are rated for your system it is probably not providing enough power to run your grinder. The batteries may also not being fully charged although with 400 watts they should provide about 33 charging amps unless you really don't have a true MPPT CC. And the 3000 watt inverter will slowly drain your battery even without a load.

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              • jflorey2
                Solar Fanatic
                • Aug 2015
                • 2331
                #49
                Originally posted by solisd2020
                I'm sorry I am new at this, I also plug in a jigsaw with same results, I've got two (12v) batteries connected in such a way to stay with 12v. My two solar panels are worth 200 watts. and I have a 3000 watt Power inverter. Thanks.
                As a guess your batteries and/or wiring isn't cutting it.

                Let's assume some numbers. Your grinder might take 1500 watts to start up. 1500 watts is 125 amps. That requires two good (fairly new 100ah or so batteries) with at least 2 gauge wiring if the wiring run is short. If it's long you need closer to 1/0.

                If you are using lesser batteries or thinner wire, the voltage is probably dropping too low and the inverter is cutting out.

                Also not sure of what inverter you are using, but if it's the cheapest 12V inverter you could find on Amazon, it is likely not really a 3000 watt inverter.

                  Comment

                  • Fordtrucksforever
                    Member
                    • Oct 2019
                    • 42
                    #50
                    I can easily load down a 4 1/2" angle grinder and overload a 2000 watt generator. I would have to guess your 3000 watt inverter is rated for 1500 watts continuous. You are seriously maxing it out using an angle grinder. Powering it with two 12 volt batteries just aint going to cut the mustard for very long.

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