Island Solar?

FlyingScot · 01-24-2018, 02:05 PM

Quote:

Originally Posted by Joebon

You have to be totally off the grid for continuous power and need a battery.

Not quite. You need a battery, but you do not need to be off the grid. Install solar and battery. The Sun charges your battery then sends energy to the grid. When the grid goes down, your battery kicks in.

VitaBene · 01-24-2018, 03:02 PM

Quote:

Originally Posted by PeterG

Not quite. You need a battery, but you do not need to be off the grid. Install solar and battery. The Sun charges your battery then sends energy to the grid. When the grid goes down, your battery kicks in.

I thought that if you were connected to the grid, the battery cannot be used in the event of a power failure?

Rusty · 01-24-2018, 04:07 PM

Quote:

Originally Posted by VitaBene

I thought that if you were connected to the grid, the battery cannot be used in the event of a power failure?

Nope, a hybrid solar system with Lithium batteries can do it.

NH.Solar · 01-24-2018, 10:08 PM

This excellent short video link is already in the Welch Island thread, but I think it is worth re-posting here; the StorEdge solution

BroadHopper · 01-25-2018, 09:06 AM

I managed a project back in 2010. They owners insist on going solar. Because of the shoreline protection act, the trees cannot be removed for the solar panels to be effective. And they are tall trees!

The building inspector and the state agreed upon 'temporary' panels along the shore. As long as the panels are not permanently 'fix', they can be used. I'm trying to find pictures of the installation, but basically the panels are placed so that they can be easily removed. You can see the installation on Rocky Pond in Gilmanton.

I thing Shorething can chime in on any changes since 2010.

VitaBene · 01-26-2018, 08:39 AM

Quote:

Originally Posted by Rusty

Nope, a hybrid solar system with Lithium batteries can do it.

Wouldn't a battery backed system still need some type of interlock so that it was not back feeding the grid, much like with a generator?

Rusty · 01-26-2018, 10:52 AM

Quote:

Originally Posted by VitaBene

Wouldn't a battery backed system still need some type of interlock so that it was not back feeding the grid, much like with a generator?

A short answer to that is yes, a long answer would have to be given by a someone who knows how hybrid vs other battery backup solar systems work when they are hooked to the grid.
Maybe forum member "NH.Solar" can help answer your question.

NH.Solar · 01-26-2018, 09:15 PM

A solar system equipped with a hybrid inverter and battery is able to take the power being generated by the panels and; 1.use it either directly in the home, 2.charge the battery, 3.or feed the excess power back into the grid for utility company credits ...as long as the grid remains live.
If the grid should go down a hybrid inverter instantly disconnects from the grid, but it remains live and connected to the solar array and battery. The energy from the solar panels can then still be either used directly by the home or to maintain the charge in the battery. A single LG RESU or the competitive Tesla Powerwall can only power about 30 amps and the loads need to be carefully chosen and wired into a separate essential loads panel. The weather, time of year, and the consumers conservation habits will determine how much total power will be available during a prolonged outage, but it should be enough to carry a homes essential functions indefinitely even if the outage is very prolonged. Hurricane Sandy was a major impetus to the rapid development that has taken place in hybrid solar/battery backup systems in just the last few years.
A solar system equipped with a regular inverter and no energy storage must instantly be shut down in the event of a power outage. This is done to prevent backfeeding power from the solar array into the broken grid and causing harm to the linesmen working to repair it. The house would thus have no power from either the grid or the solar system. Unfortunately a lot of folks on the Jersey shore with simple solar systems were not aware of this requirement until after the hurricane and their homes had no power for weeks on end.

Rusty · 01-26-2018, 10:26 PM

Thank you NH.Solar.
This is how I understand Hybrid Solar, I just couldn't put it in words that would make sense to anyone.

01-24-2018, 10:08 PM	#4
NH.Solar Senior Member Join Date: Jan 2017 Location: Jackson Pond, New Hampton Posts: 248 Thanks: 48 Thanked 142 Times in 79 Posts	This excellent short video link is already in the Welch Island thread, but I think it is worth re-posting here; the StorEdge solution __________________ Peter NH Solar

01-25-2018, 09:06 AM	#5
BroadHopper Senior Member Join Date: Oct 2004 Location: Laconia NH Posts: 5,667 Thanks: 3,281 Thanked 1,132 Times in 814 Posts	DES and Solar Panels I managed a project back in 2010. They owners insist on going solar. Because of the shoreline protection act, the trees cannot be removed for the solar panels to be effective. And they are tall trees! The building inspector and the state agreed upon 'temporary' panels along the shore. As long as the panels are not permanently 'fix', they can be used. I'm trying to find pictures of the installation, but basically the panels are placed so that they can be easily removed. You can see the installation on Rocky Pond in Gilmanton. I thing Shorething can chime in on any changes since 2010. __________________ Someday may never be an actual day.

01-26-2018, 09:15 PM	#8
NH.Solar Senior Member Join Date: Jan 2017 Location: Jackson Pond, New Hampton Posts: 248 Thanks: 48 Thanked 142 Times in 79 Posts	A solar system equipped with a hybrid inverter and battery is able to take the power being generated by the panels and; 1.use it either directly in the home, 2.charge the battery, 3.or feed the excess power back into the grid for utility company credits ...as long as the grid remains live. If the grid should go down a hybrid inverter instantly disconnects from the grid, but it remains live and connected to the solar array and battery. The energy from the solar panels can then still be either used directly by the home or to maintain the charge in the battery. A single LG RESU or the competitive Tesla Powerwall can only power about 30 amps and the loads need to be carefully chosen and wired into a separate essential loads panel. The weather, time of year, and the consumers conservation habits will determine how much total power will be available during a prolonged outage, but it should be enough to carry a homes essential functions indefinitely even if the outage is very prolonged. Hurricane Sandy was a major impetus to the rapid development that has taken place in hybrid solar/battery backup systems in just the last few years. A solar system equipped with a regular inverter and no energy storage must instantly be shut down in the event of a power outage. This is done to prevent backfeeding power from the solar array into the broken grid and causing harm to the linesmen working to repair it. The house would thus have no power from either the grid or the solar system. Unfortunately a lot of folks on the Jersey shore with simple solar systems were not aware of this requirement until after the hurricane and their homes had no power for weeks on end. __________________ Peter NH Solar

01-26-2018, 10:26 PM	#9
Rusty Senior Member Join Date: Oct 2010 Posts: 2,028 Thanks: 603 Thanked 687 Times in 425 Posts	Thank you NH.Solar. This is how I understand Hybrid Solar, I just couldn't put it in words that would make sense to anyone. __________________ It's never crowded along the extra mile.

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