Okay, let's break this down. You've moved your inverter and disconnect switch, extended the circuits from your solar panels, and now you're concerned you might have mixed up the circuits in the process. It's good you're being cautious!Understanding the Situation Why Matching Matters

Solar panels are wired in strings (series) to increase voltage. Two strings would then typically be wired to the inverter in parallel to increase current. If you mix up the positive and negative from different strings, you essentially create a short circuit, which can damage the panels, inverter, or wiring.

Inverter Indicators

Green and blue LEDs might indicate the inverter is working, but it doesn't guarantee everything is correct. The inverter may have some basic protections, but it won't catch every wiring error.

Answering Your QuestionsQ1: How can I tell without a continuity test if I mixed the circuits? Could I amp probe and look for a balanced circuit? Amp Probe and Balanced Circuit (With Extreme Caution)

In theory, yes. You could use an amp probe to check for balance,

BUT THIS IS RISKY AND REQUIRES EXTREME CARE. Here's why: Potential for Short Circuit

If you have mixed the circuits, energizing the system (letting the sun hit the panels) before verifying with a continuity test could cause a large short circuit current to flow when the inverter attempts to start charging.

How it Works (If You Proceed Cautiously)

Assuming you haven't already caused damage, and you are confident that you have properly connected the positives and negatives, you could try the following:1.

Block the Panels (Most Important Safety Step)

Completely cover the solar panels. Use opaque material (like tarps) to block all sunlight. This minimizes the voltage and current they produce.2.

Monitor DC Voltage and Current

Connect your meter to the inverter DC input terminals. As you slowly expose each panel. Keep the voltage and current within range (under the Inverter operating range.

Q2: Would the system still work if I did mix the circuit because I went on and held a solid green and blue led? No Guarantee

As mentioned before, a green/blue LED doesn't guarantee proper wiring. Inverters can detect reverse polarity and high/low DC input, but they may not always prevent damage. Running the system with mixed circuits, even briefly, can damage the panels, inverter, or wiring.

What To Do (Most Important: SAFETY FIRST!)1. DISCONNECT IMMEDIATELY

If you have any doubt about the wiring, disconnect everything: Turn off the AC breaker that feeds the inverter. Open the DC disconnect switch. If possible, physically disconnect the wiring at the panels or inverter.2.

Continuity Testing (Required)

This is the safest and most reliable way to verify your wiring. Here's the process:

Ensure Absolutely No Power

Completely disconnect all power sources (AC and DC). The panels must be covered to prevent them from producing any voltage.

Identify Pairs

You should have two pairs of wires: one positive and one negative from each of the two separate strings of solar panels.

Test Each Pair

Use a multimeter set to continuity or resistance. Between the positive and negative of the same string, you should see no continuity (very high resistance, often displayed as "OL" on the meter). You are verifying that the positive and negative are not shorted together. Between the positive of one string and the positive of the other string, you should see no continuity. Same for negative to negative.

Label Wires

Use wire labels or tape to clearly mark each pair of wires.3.

Professional Inspection (Highly Recommended)

Given your uncertainty and lack of experience with solar wiring,

the best course of action is to hire a qualified solar installer or electrician to inspect your work. They can identify any potential wiring errors and ensure the system is safe and operating correctly. This is a small price to pay to avoid damaging expensive equipment or creating a safety hazard.

Important Safety Considerations



Voltage Can Be Deadly

Solar panels can produce high DC voltages, even in low sunlight. DC voltage is especially dangerous because it can cause muscles to lock up, making it difficult to let go.

Arc Flash

Incorrect wiring can cause arc flash, which is an explosive release of energy that can cause severe burns and other injuries.

Permits and Codes

Ensure your work complies with local building codes and permit requirements. Solar installations often require inspections.

In summary: Don't risk it. A continuity test is essential for your safety and the equipment's well-being. When in doubt, always consult a qualified professional. Flag for review