hybrid inverter and batteries

[mudhole]

I installed a 5kw system, with a 5k sma grid tie inverter. I was looking at a solar generator with 240v capabilites, but started thinking, could I just change out my inverter for a hybrid and add batteries? if so , which would you suggest, I know that sma has a new hybrid inverter, not sure what batteries you have to use with it, would really like a battery agnostic hybrid inverter, and suggestions on batteries?

 

[DIYrich]

Gwowatt sph 10000tl-hu-us

 

[mudhole]

what batteries do you recommend for the Gwowatt sph 10000tl-hu-us?

 

[DIYrich]

EG4 Powerpro (about 14kWh if you can manage 300#, about $3,500 depending if you need the outside model), a variety of 5kWh rack batteries are available (each about $1,200 or more) or DIY (about $2,000 for a 15kWh battery)

 

[mudhole]

1. where do you suggest purchasing these?
2. can you explain "DIY (about $2,000 for a 15kWh battery)" , I am all about diy to save money, how do you get 15kw for $2000?

 

[kommando]

how do you get 15kw for $2000?

You buy 16 LFP cells 3.2V 300ish AH and a BMS, then either build or buy a box and assemble into a Battery.

I have built 2 using the easy way by buying a box with the BMS and all the wires etc included. UK cost was £1550 ea.

 

[Citlalatonac]

1. where do you suggest purchasing these?
2. can you explain "DIY (about $2,000 for a 15kWh battery)" , I am all about diy to save money, how do you get 15kw for $2000?

You may run into code issues connecting DIY batteries to a hybrid inverter. Even if your local AHJ is fine, the power company is unlikely to appreciate you plugging a DIY battery to their grid. An offgrid solution is usually better for the DIY route. You'll probably need something that's UL listed.

UL 9540 and 9540A Explained — Mayfield Renewables

In 2018, the California Solar Energy Industries Association (CALSEIA) rebranded to become the California Solar and Storage Association (CALSSA). Their

www.mayfield.energy

Where to find them?

Batteries | Current Connected

Batteries – Store your power with our top of the line battery solutions!

www.currentconnected.com

All Products - Batteries - Signature Solar

Explore a wide range of batteries from Signature Solar: BigBattery Ethos, EG4-LiFePower4, EG4-LL, and more. Perfect for any energy storage setup, ensuring top performance and durability.

signaturesolar.com

 

[1201]

I installed a 5kw system, with a 5k sma grid tie inverter. I was looking at a solar generator with 240v capabilites, but started thinking, could I just change out my inverter for a hybrid and add batteries? if so , which would you suggest, I know that sma has a new hybrid inverter, not sure what batteries you have to use with it, would really like a battery agnostic hybrid inverter, and suggestions on batteries?

You need to make sure that your steering size is compatible with the new inverter.

Your sma probably has 600v input. If that's maxed out you'll need to make sure the new inverter can also do 600v input. If you're not maxed out then you have many more options.

 

[DIYrich]

the power company is unlikely to appreciate you plugging a DIY battery to their grid.

I don't think the power company cares about whether a battery is diy or not. It is the inverter that they care about. AHJ may care about UL9540 for fire safety.

 

[mudhole]

does the growatt inverter need to have a separate "essential circuits panel" ?

is what I am planning as simple as just swapping out the grid tie inverter with a hybrid, adding a battery bank and making sure the voltage inputs are within the new inverter range?