Newpowa 100W Solar Panel Review

I recently tested the Newpowa 100W solar panel.

I tested it with a multimeter. I rigged up a custom testing system to measure its power output. And I used it in my solar power projects for over a month.

It performed well across the board. After all that, I think the Newpowa 100W 12V solar panel is a well-made and affordable monocrystalline panel. For those looking for a 100W mono panel, it’s a great option.

Newpowa 100W 12V Monocrystalline Solar Panel

A 100W mono panel at a good value

The Newpowa panel is a solid combination of value and performance. It’s also smaller and lighter than many other similarly priced 100 watt solar panels.

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Solar cell type: Monocrystalline Max power (Pmax): 100W
Max power voltage (Vmp): 16.77V Max power current (Imp): 6.26A
Open circuit voltage (Voc): 19.83V Short circuit current (Isc): 6.56A
Dimensions: 44.49″ x 19.88″ x 1.18″
(1130mm x 505mm x 30mm)
Weight: 14.55 lbs (6.6kg)

Newpowa Solar Panel Review

First Impressions

I first came across Newpowa when I bought their 5W solar panel to make a DIY solar car battery charger. Their 5W panel impressed me, so I reached out to them to see if I could try out their 100W monocrystalline panel.

They agreed and generously sent me one.

It arrived well packaged and in great condition. (By contrast, other solar panels I own have been poorly packaged and arrived with dents in the frame.)

Right out of the box I like to check the product specs, such as weight and dimensions, against the manufacturer’s claims.

I pulled it out of the box and saw the characteristic black of monocrystalline solar cells. I could tell it was a little smaller and lighter than other 100 watt solar panels I own.

I did a quick inspection of the panel’s build quality. Everything about the panel at first glance looked good. Then I checked some of its specs, such as weight and dimensions, against the manufacturer’s claims.

But what I really care about when it comes to solar panels is their power output. So I took it outside to do some initial testing with a multimeter.

Multimeter Testing

I put the Newpowa panel in direct sunlight at noon on a sunny September day.

First, I used my multimeter to measure the open circuit voltage (Voc) of the solar panel.

I measured an open circuit voltage (Voc) of 19.91V. The panel claims a Voc of 19.83V at STC.

I measured a max Voc of 19.91V. The panel claims a Voc of 19.83V at STC.

Next, I used my multimeter to measure the short circuit current (Isc).

I measured a short circuit current (Isc) of 6.57A. The panel claims an Isc of 6.56A at STC.

I measured a max Isc of 6.57A. The panel claims an Isc of 6.56A at STC.

I was impressed by these initial results. Other solar panels I’ve tested with a multimeter haven’t usually exceeded both their claimed Voc and Isc.

But a multimeter only tells you so much. The test I find most informative is power output in watts. So I went about rigging up a testing system to measure just that.

Installation & Mounting

I set up my Newpowa solar panel by first connecting a battery then the Newpowa panel to a solar charge controller.

Note: Check out my tutorial on how to set up your first solar power system

I also added a power meter inline with the solar cables and connected a Bluetooth module to the charge controller. These two additions gave me two different ways to measure the panel’s power output.

To measure the panel’s power output, I added to my testing setup an inline power meter and Bluetooth module that records data from the charge controller. Both additions measure power output in watts.

I didn’t permanently mount my panel, but it has the standard number of mounting holes. There are two on either side of the frame, plus a small hole in the middle for grounding.

The Newpowa 100 watt solar panel offers the standard number of pre-drilled mounting holes.

Power Output Testing

My testing setup complete, I took the panel outside at noon and placed it in direct sunlight. I stood it at the optimal tilt angle for my location.

Using the power meter and charge controller, I recorded the panel’s power output in watts.

The max power output I recorded was 86W.

This output was confirmed by both the power meter:

And the solar charge controller:

I tested the Newpowa panel on September 23rd. On that day the charge controller recorded a max charging power of 86 watts.

86 watts is a good result for a 100W panel. Solar panels rarely output 100% of their rated power.

Note: I tested the panel at 33.7° in late September. The temperature was 72°F (22°C).

Build Quality

Like I said, the panel arrived in good condition, without bends in the frame or scratches on the panel glass.

The panel’s frame and glass arrived without dents or scratches.

The cables and MC4 connectors looked to be of good quality. I twisted the connectors to test for any looseness — a sign of a poorly crimped connector — but found none.

Then I popped open the junction box on the back of the panel, which has an IP65 waterproof rating. I tugged on the crimps and inspected the solder joints. Everything looked good. I noticed the panel has four bypass diodes. Other 100 watt panels I’ve tested only have two.

Giving the cables a little tug test to see if they’re well crimped.

I also noticed what appeared to be waterproof sealant around the inner rim of the panel back. I’ve seen this before in other solar panels. Perhaps it makes the Newpowa panel a little more waterproof.

All in all, the panel seemed sturdy and well-built.

Dimensions & Weight

The Newpowa 100W monocrystalline solar panel (left) next to two 100W polycrystalline solar panels. The Newpowa panel is the smallest 100W panel I own.

Here’s how the Newpowa panel’s size (length * width) compares to other top 100W panels:

And here’s how its weight compares:

The Newpowa panel is the second smallest of these panels, nearly 200 square inches smaller than the bulky WindyNation 100W polycrystalline panel. And it’s only 0.3 pounds heavier than the lightest.

If you have space or weight constraints, the Newpowa mono panel is worth a close look. Monocrystalline cells are more efficient than polycrystalline cells, so you get the same max power output but in a slightly smaller panel. And as far as mono panels go, the Newpowa 100W is a great value.

Key Specs

  • Solar cell type: Monocrystalline
  • Max power (Pmax): 100W
  • Max power voltage (Vmp): 16.77V
  • Max power current (Imp): 6.26A
  • Open circuit voltage (Voc): 19.83V
  • Short circuit current (Isc): 6.56A
  • Dimensions: 44.49″ x 19.88″ x 1.18″ (1130mm x 505mm x 30mm)
  • Weight: 14.55 lbs (6.6kg)

What I Like

  • It’s a well-made and affordable monocrystalline solar panel. Monocrystalline solar panels have more efficient solar cells, so they can provide the same amount of power in a smaller panel. They are more expensive than polycrystalline solar panels, though.
  • It’s a small and lightweight 100 watt solar panel. It’s on the lower end of the spectrum in terms of size and weight when compared to similarly priced 100 watt panels.
  • It performed well in my power output tests. I measured a max power output of 86W during my tests, which is in line with what I’d expect from a 100W panel.

Who This Solar Panel Is for

  1. You have space constraints. Given its small size and weight relative to similar 100W panels, the Newpowa panel is a good option if you have limited space to mount your panels — such as on the roof of a van, boat or RV.
  2. You want an affordable monocrystalline solar panel. Mono panels output the same amount of power as similarly rated poly panels, but monocrystalline cells are more efficient and thus mono panels can be smaller and lighter. Mono panels are also black while poly panels are blue.

The Bottom Line

The Newpowa 100W 12V solar panel is a well-made and affordable monocrystalline solar panel. It’s small and lightweight relative to similarly priced 100W panels, and it has a couple nice touches — waterproof sealant inside the panel frame, a couple extra bypass diodes — that make it a tad bit nicer than cheaper options.

It output a max of 86 watts in my power output tests, which is inline with what I expect from a 100W panel. Overall it’s a great value.

A small ask: If you found my Newpowa solar panel review helpful and are planning to buy one, please consider buying through one of my affiliate links below — I’ll get a small commission which will help fund more reviews like this one. Thank you! 🙏

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Alex Beale
Alex Beale
Hi, I'm Alex. I started Footprint Hero to help people reduce their environmental impact. My current obsession is DIY solar power projects, which I've been building since 2020.
Alex Beale

Alex Beale

Hi, I'm Alex. I started Footprint Hero to help people reduce their environmental impact. My current obsession is DIY solar power projects, which I've been building since 2020.

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