The Surprising Reason Your Solar Can’t Last Till Morning

ByGLOBALNET ICT

You bought a solar system expecting stress-free, all-night power.
But instead, your inverter shuts down around midnight or 3 a.m…
And you’re left wondering:

“Why is my solar not lasting till morning?”

Here’s the truth…

Most people think the problem is their panel or inverter, but the real culprit is often hidden where you least expect it.

Today, you’ll discover the surprising reason your solar dies early, plus the simple steps to fix it and make your system last till sunrise — consistently.

The #1 Hidden Reason Your Solar Can’t Last Till Morning: Under-Charging

Yes — your solar system is probably not charging fully during the day.

This is the silent killer of battery performance.

Even if you have a big battery, if it doesn’t reach 100% charge by late afternoon, it will not last through the night.

Most solar owners never realize this is happening.

Why Your Batteries Aren’t Charging Fully

Here’s what causes under-charging (often without your knowledge):

1. Your Solar Panels Are Not Getting Enough Sunlight

  • Your panel is partially shaded by a tank, roof edge, or tree
  • The sun angle is wrong
  • The panel is installed flat instead of facing the sun
  • Clouds or rainy season reduce energy input

Even 10% shade can reduce your panel output by up to 40%.

2. Your Panels Are Dirty

Dust, deposits, bird droppings, and harmattan haze reduce output drastically.

A dirty panel = a slow-charging battery.

You must clean panels every 2–4 weeks (weekly during harmattan).

3. Your Panels Are Undersized

This one surprises many people.

You can have:

  • a 200Ah battery
  • paired with only 200W of solar

This setup will never reach full charge — even with perfect sunlight.

Rule of thumb:

Your solar panel wattage should be at least 1.5× your battery size (in Ah)
Example: 200Ah battery → 300W–450W panel

4. Your Charge Controller Is Not Doing Its Job

Cheap controllers mismanage voltage.

They may:

  • stop charging too early
  • charge too slowly
  • fail to push the battery to full absorption stage

Result: your battery never reaches 100%.

5. Bad Wiring and Voltage Drop

Tiny wires create resistance.

Resistance = wasted energy.
Wasted energy = less battery charging.

If your installer used thin 2.5mm wires, you’re losing power.

You need:

  • 4mm² – 6mm² for panel wiring
  • 10mm² – 16mm² for battery to inverter wiring

The Second Surprising Reason: Your Night Load Is Higher Than You Think

Most people underestimate what they use at night.

You think you’re running:

  • one fan
  • two bulbs

But in reality, you’re also powering:

  • routers
  • decoders
  • chargers
  • CCTV cameras
  • standing fans (high watt draw)
  • laptops
  • small fridges
  • smart TVs on standby

These “small loads” secretly drain your battery fast.

The Third Reason: Your Battery Is Not As Strong As You Think

Batteries weaken with time.
A 200Ah battery after 1–2 years may only hold 120Ah.

Symptoms of a weak battery:

  • system dies faster than before
  • voltage drops quickly
  • inverter alarms early
  • battery never reaches full charge

The Solution: How to Make Your Solar Last Till Morning

Fix these, and your solar will last all night consistently:

✔ Add more solar panels

More panels = faster charging = longer night runtime.

✔ Clean your panels regularly

Dirt is the biggest efficiency killer.

✔ Reduce unnecessary night load

Turn off standby devices.

✔ Use a proper charge controller

A good MPPT makes a massive difference.

✔ Fix wiring

Avoid voltage drop.

✔ Check battery health

Weak batteries can’t hold charge.

✔ Size your system properly

Don’t match a big battery with small panels.

Bonus Tip: Use the Globisun App for Accurate Solar Sizing

The Globisun Solar App helps users:

  • calculate correct battery size
  • know how long the battery will last
  • size solar panels accurately
  • troubleshoot solar issues
  • check inverter/battery error codes
  • improve their solar performance

This helps prevent under-charging, the main reason solar fails at night.

Final Thoughts

Your solar isn’t failing because solar “doesn’t work.”
It’s failing because something in the system is quietly preventing your battery from reaching FULL charge.

Fix that one issue, and your solar will last till morning — and beyond.

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