QUESTIONS AND ANSWERS

New Tesla battery and solar install, looking for advice

I had a solar PV system installed last week and I’m in need of a few answers to some questions.
I’ve got 30 panels on the roof and two GivEnergy inverters, with two Giv-Bat 9.5 batteries. Why is it when my batteries are charging but aren’t full, that energy produced is going to the grid. Also, why when I have my batteries 3/4 full, I’m then importing from the grid when I’m generating enough electricity for all what is required. 
Any help greatly appreciated.

02/11/2023
The inverters need adjusting to your requirements.
Have a read of the manual, the information will be in there somewhere.
the 9.5’s are 3600w, so if your PV is producing 5kw, then 1400w needs to go elsewhere. Either to be used in the house or to the grid.

Robert Hoover

2.6kw charge and discharge on gen1. If your producing more than that it’ll go back to the grid (+ what your house is currently using)
For example is your generating 5kw, and using 0.4kw in the house. 2.6kw will go to batteries and 2kw will have to go back to the grid

Jamie Pateman

The inverters need adjusting to your requirements.
Have a read of the manual, the information will be in there somewhere.

Robert Hoover

Guys I'm really sorry for jumping in, but i thought 1 inverter could connect to multiple batteries. What's the advantage of having 2 inverters?

Martin Verity

Martin Verity it’s because one inverter can only handle so many panels, I think 15, and I’ve got 30 hence the two inverters.

Gerry Walsh

Martin Verity the advantage is 2 inverters can charge and discharge at double the rate. Eg. A gen 1 hybrid is rated at 2.6kw and a gen 2 at 3.6kw. If you cook in the house or use high load electrical items then you would be importing from the grid, even if you have a full battery bank because you cant get the contents flowing out fast enough - so 2 inverters gives you either 5.2kw (gen1) or 7.2kw (gen2). Also you can charge up the batteries more quickly if charging up on a limited time window, cheap rate overnight tariff. One more thing, when you have a great number of panels the line voltage they produce has to he lower than the rated max for the inverter, so you either get a higher rated inverter or another inverter.

Jeremy Rollinson

COMPARE SOLAR PANEL SYSTEM COSTS
FIND A LOCAL SOLAR INSTALLER

HOME SOLAR

Home Solar System

FEED IN TARIFF

3KW - 5KW HOME SOLAR SYSTEMS

+ MORE

3KW HOME SOLAR
SYSTEMS
STARTING AT
£3,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER

BUSINESS SOLAR

Business solar System

COMMERCIAL BATTERY STORAGE

25 YEAR SYSTEM WARRANTY

+ MORE

10KW FULL SOLAR
SYSTEMS
STARTING AT
£10,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER

SOLAR SYSTEMS

Tesla Solar Battery System

SOLAR EDGE SYSTEMS

SOLAR BATTERY SYSTEMS

+ MORE

4KW FULL SOLAR
BATTERY SYSTEMS
STARTING AT
£4,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER
What size are your inverters?

Paul Mcnamera

According to my inference, 1. The inverter will reduce the current when the battery is almost full, and the excess electricity will enter the grid. 2. The battery is not allowed to discharge when it is less than 3/4. Power can only be supplied through the grid.

Grace Hou

Grace Hao, not really, the point of a battery is to run it to flat if need be.1. Yes but only to a slight degree that I have noticed over the last few percent

Jeremy Rollinson

Show a picture of the name plates, on the side of the inverters and batteries, you can find the manuals for them .

Robert Hover

SOLAR SYSTEMS

Tesla Solar Battery System

SOLAR EDGE SYSTEMS

SOLAR BATTERY SYSTEMS

+ MORE

4KW FULL SOLAR
BATTERY SYSTEMS
STARTING AT
£4,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER

HOME SOLAR

Home Solar System

FEED IN TARIFF

3KW - 5KW HOME SOLAR SYSTEMS

+ MORE

3KW HOME SOLAR
SYSTEMS
STARTING AT
£3,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER

BUSINESS SOLAR

Business solar System

COMMERCIAL BATTERY STORAGE

25 YEAR SYSTEM WARRANTY

+ MORE

10KW FULL SOLAR
SYSTEMS
STARTING AT
£10,000+
Over 4,000+ Solar Installers in the U.K.
ready to quote your solar system.
FIND ME A SOLAR
PANEL INSTALLER
Driveway installer
FIND ME A LOCAL SOLAR COMPANY
COPYRIGHT © 2024
SOLAR INSTALLER COST CALCULATOR