Forum Discussion

trailrider's avatar
trailrider
Explorer
Aug 23, 2016

Which is the better deal? Solar Panel

Which is the better deal? Grape Solar 100 watt poly vs 160 watt mono. Different warranties.

http://www.homedepot.com/p/Grape-Solar-100-Watt-Polycrystalline-Solar-Panel-for-RV-s-Boats-and-12-Volt-Systems-GS-Star-100W/204211365

100 watt poly: 5 year limited product warranty on materials and workmanship. 25 year warranty on greater than 80% power output and 10 year warranty on greater than 90% power output.

http://www.homedepot.com/p/Grape-Solar-160-Watt-Monocrystalline-PV-Solar-Panel-for-Cabins-RV-s-and-Back-Up-Power-Systems-GS-S-160-Fab8/202959994

160 watt mono: 10 year limited product warranty on materials and workmanship. 15 year warranty on 80% power output and 10 year warranty on 90% power output.

Comparison on one page:

http://www.homedepot.com/p/compare/?errorURL=ProductAttributeErrorView&langId=-1&storeId=10051&catalogId=10053&prodComp_0=202959994&prodComp_1=204211365&N=5yc1vZbm2yZ8p9

18 Replies

  • Okay, next problem. I was going to order 2 100 watt panels from Solar Blvd after clicking the link above by smkettner. I get to the shipping and it says 2 x 42 lbs. The specs say one panel is 25 lbs. Should be 2 x 25 lbs. I don't think there is 17 lbs of packing for each panel. Ripoff?

    AND I looked at the address bar in my browser and it has a red x on the padlock and a slash through the https. I click that and it says: This site uses a weak security configuration, so your connection may not be private. :R Son of a , I may just go with the Home Depot site.
  • If space is a premium. Otherwise watts is watts. Efficiency just makes the panel smaller for same wattage.
    Actually for PWM controller compare Isc as that will be the amps you get.
    Virtually the same between panels these panels.

    Not saying either is better. Just something to compare.
  • smkettner wrote:
    Price per watt is king. Although I would rather mount and clean two panels vs three. Unless the smaller size fit better between shade items on the roof.

    160 watt $115 Need to verify shipping cost.

    Warranty: For panels that range from 80w to 200w, an output power of more than 90% of the minimum peak power within 10 years and more than 80% in 20 years is guaranteed.


    That one is 14.7% efficient vs 19% for the Grape Solar. Seems like a big difference on that spec.
  • Price per watt is king. Although I would rather mount and clean two panels vs three. Unless the smaller size fit better between shade items on the roof.

    160 watt $115 Need to verify shipping cost.

    Warranty: For panels that range from 80w to 200w, an output power of more than 90% of the minimum peak power within 10 years and more than 80% in 20 years is guaranteed.
  • Whatever is best for your needs is, to me, the better deal. You have to live a lot longer with the panel than the deal.
  • Almot's avatar
    Almot
    Explorer III
    Apples to oranges.

    Depends what you want - more watts or cheaper per watt.

    I'm usually the one to buy quality items for long-term use, but it seems that with few exceptions today's buyers are stuck with unknown makes from big black hole called China. So... Ignore the warranty blurb.

    160W @$1.20 per watt is costly, but if you only have room for this one panel - install it and be done with it. Normally, I would choose 100W Poly over 100W Mono. But then again wattage is the king, 100W poly will harvest less energy than 160W mono.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,283 PostsLatest Activity: Jul 17, 2025