Grape Solar GS-S-100-TS 100 Watt Monocrystalline Off-Grid PV Solar Panel

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Product Feature

• 10 year limited power warranty on power output
• Panel Dimensions: 40.8-inches x 20.7-inches x 1.38-inches, weighs 16.3-pounds
• High cell efficiency PV solar panel with quality silicon material for long term output stability and reliability.
• Rigorous quality control to meet the highest international standards
• 32 back-contact monocrystalline Si solar cells (approx. 20%)

Product Description

This Grape Solar 100W Off-Grid Model is the smallest in size, is lightweight, the most efficient, and ideal for off-grid applications.

Grape Solar GS-S-100-TS 100 Watt Monocrystalline Off-Grid PV Solar Panel Review

If you are going to get an off-grid solar panel...THIS IS IT. I have looked high and low for the right panel and this thing out does every stinking single one of them. Mind you, this is before I even got the thing. This is just with research alone. For example, solar cells have a module efficiency rating that is anywhere from 7-18%. Pretty crappy ones have around 12%. Average ones have 14-15%. Really good ones have 15-16%. THIS ONE HAS 18%. This is the ONLY solar panel you will find out there that has a TRUE module efficiency rating of 18% (basically, how well it turns sun energy into electricity). A lot of them will try to claim that they get around 18% and such, but when you look at the actual manufacturer specs, it's only around 14%.

It also comes with a kind of glass that reduces reflection so that it can absorb as much of the sun energy as possible. It is specifically designed for some pretty heavy weather. It has MC4 connections which are easy as cake to deal with (you can get MC4 splitters and such to run these in parallel which is also easy as cake).

Believe me, I did a lot of math before purchasing this as well such as price-per-watt compared to module efficiency rate in relation to panel size, etc...and every single time, it pointed to....the Grape GS-S-100-TS. THEN, I receive it. After having some polarity "issues" and getting them fixed, I finally get this thing up and running. Well, On a really cloudy day (I live in WA...) I was pulling in 4-6 amps (not AH mind you) for two of these panels (200W total) before the MPPT controller upped it a couple more amps. That's not too shabby. I could charge about a 90AH battery in about a day or so. Then I wiped down the panels (they were getting dusty and dirty from all the rain), and a sunny day happened to emerge and wow...I'm pulling 15 amps on two panels. As long as I keep these clean, and it's at least somewhat sunny (somewhat even!) I can literally charge two 100AH batteries in parallel within 3-4 hours. I couldn't believe it. I put two 100AH batteries on it before I went to bed one night, and by noon the next day, they were both not only fully charged, but fully equalized (the controller bumps up the voltage to 15VDC to give each cell in the battery equal charge and to hit any cells that might have gotten "skipped over" so to speak).

All in all, if you are going to get any type of off grid system, or just a couple panels to have backup power, and you're willing to spend a little more cash, THESE are your panels. They are amazing. The numbers impressed me immensely, and when I received them, their performance impressed immensely.

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