Apollo Solar TSW4048 and TSW3224 DIP switches

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The Apollo Solar TSW series inverter/charger is a newcomer to the renewable energy market which brings a surprise: worldwide power grid compatibility! Here’s what you can do….

Need 50 Hz, or 230/115v instead of 240/120? Remove ALL power sources from the inverter – grid AC and battery DC. Press the standby button and let the inverter try to start up if it hasn’t gone dead already. It should just make it through the countdown and bleep out. Remove the four screws on the top cover and try to lift it off. It’s a pretty tight fit and you may need to pry carefully. I used a plastic knife as not to scratch the paint.

Once the cover comes up, carefully move it up and to the right and push the plastic eject levers on the LCD board’s connector apart. The ribbon cable should come free. Set the cover aside.

The two dip switches are on the top of the control board, the same board where the ASnet and temp sensor cables go in.

Switch 1 – closest to the battery terminals – sets voltage. Down is 240, up is 230. Switch 2 is the frequency, down 60, up 50.

After setting these, blow out any dust that’s accumulated if the inverter was previously used, reconnect the LCD cable, put the cover back, and restore power. If you didn’t get the cable back in, the inverter will play dead till you fix that. No harm done really.

There are a lot of other parameters editable from PC software – I’m not set up with that yet but I’ll post about that once I get all the bits together.

7 thoughts on “Apollo Solar TSW4048 and TSW3224 DIP switches”

  1. Hi. I’m using an Apollo TSW4048 inverter and need a replacement fan to cool the transformer. Could you kindly assist me in finding one?

  2. Hi. I’m using an Apollo TSW4048 inverter and need a replacement fan to cool the transformer. Could you kindly assist me in finding one?

    1. It’s been years since I’ve laid eyes on one of these. Have you already opened the inverter, and if so, can you see the specifications on the fan label and a part number, or can you measure its size? My guess is there’s about a 99% chance it’s something pretty standard and easy to come by

      1. Yes sir. This machine is a little beast 😀. I did open the inverter but unfortunately I didn’t take down the specifications for the fan. I’ll do so as soon as I can. Do you still have the one that you did your post about few years ago?

        1. Unfortunately no, I don’t work for that supplier anymore. Look at the fan, it should tell you the voltage and current and the part number will probably contain the frame size in millimeters, or just Google the part number to find its full data. When ordering a replacement, go for one that’s dual ball bearing.

      2. Yes sir. This little guy is a beast. I did opened the inverter but unfortunately I didn’t check the specifications for the fan. I will do so ASAP. Do you still have the Apollo inverter you did your post on few years ago.

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