Comments on: SOLAR TRAINING DIY SOLAR PANEL PV PHOTOVOLTAIC HARBOR FREIGHT SOLAR ENERGY SOLAR PANEL KITS

By: glassinfreno

glassinfreno — Wed, 06 Jan 2010 21:14:14 +0000

Thank you! I have this system in my class room for reference. Great Video!

By: linuxpyro

linuxpyro — Wed, 06 Jan 2010 20:23:41 +0000

In a system with AC and DC loads a higher voltage means the inverter doesn’t have to work as hard to do the conversion as it would with a lower voltage. This makes it easier to start difficult loads like motors, as less current is going through the inverter components.

That said in a smaller system you’re probably not as likely to run that stuff from the inverter, so that’s probably not a bad rule of thumb to keep things simple.

By: headoyster

headoyster — Wed, 06 Jan 2010 07:05:42 +0000

You need to measure short circuit current on the panels. Check with specifications. That way you can find out if it’s the panels. If the panels are fine, move on to next possibility: cables, then controller, then batteries. If your batteris are dead no current will be pulled from the panels to charge them. Just go through one by one.

By: headoyster

headoyster — Wed, 06 Jan 2010 07:02:36 +0000

Maybe, but I’m a 4th year Renewable Energy Engineer at UNSW, and thats what I learnt in my “Stand alone PV” class. Less than 1 kW, 12V is recommended.

By: linuxpyro

linuxpyro — Tue, 05 Jan 2010 16:29:03 +0000

Actually, I would say that if you’re less than 1 KW and not planning on running DC loads (and instead running AC loads via an inverter) it’s not a bad idea to try to go with a higher voltage.

By: tekriavideos

tekriavideos — Mon, 04 Jan 2010 20:43:51 +0000

why would you plug in bulbs when you have the sun and without the sun you still have no light to power the bulbs

By: headoyster

headoyster — Mon, 04 Jan 2010 06:37:18 +0000

ok lets start with this: under 1 kW solar panels installed, use 12 V, 1-2 kW use 24 V, then use 48 V etc. So I assume you have lass than a kW instaled, so use 12 battery: that means parallel. However, pick your batteries so you don’t have more than 3 in parallel, you will get uneven charging problems (hence why you should then connect batteries in series for larger systems). I suspect if your batteries and panels are ok, your inverter is the culprit.

By: GREENPOWERSCIENCE

GREENPOWERSCIENCE — Sun, 03 Jan 2010 19:26:31 +0000

@ABOSOLUTEKNOWLEDGE I have 1KW on the way:-)

By: ABOSOLUTEKNOWLEDGE

ABOSOLUTEKNOWLEDGE — Sun, 03 Jan 2010 13:18:10 +0000

quit toying aorund do whole ssytem

2000 wat setup of the grid for whole house or duplex

By: captainboaz

captainboaz — Thu, 31 Dec 2009 01:15:17 +0000

what about useing a batter saver i use it on my boat and double my useage out of my battery and bass pro sells them for around $40