Hi everyone,

I’m looking for an MCS-certified electrician or solar installer to help me with a battery retrofit for my existing solar system here in LS11.

I am planning to add a Fogstar Energy ECO 16.1kWh battery. I would like the installer to supply the battery at the 0% VAT rate as part of a "supply and fit" contract.

I already have a used Solis inverter which I will provide for the installation. I’m happy to handle some of the cable prep/routing beforehand to save time, but I need a professional to handle the high-current connections and provide the necessary safety certifications.

If you’re a local installer or can recommend someone reliable who is comfortable working with customer-supplied inverters, please get in touch with a rough quote or to arrange a quick look at the site.

Thanks!

There will be loads of solar install firms who work near you.  Get 3 quotes and pick one.  It may be that they will not fit used kit or have wiring by others but you can ask.

I tried to do something similar with our install but no one locally was interested in certifying things if they didn't do the full install.

 

Good luck - and if you find someone, I'd be interested in getting in touch with them - we're south Notts, so not that far away.

It’s all about blame / risk / return visits and arguing over who’s part of the install or kit is to blame.

 

Good luck, but I’d walk away from that job every day of the week. 

Maybe there’s scope for the physical panel install - that’s probably 2/3rds of the work.

they wont touch it.

 

its a closed con shop the MCS system.

 

They will want to have done all the work and charged you 5x the market rates.

On 09/04/2026 at 18:22, Bosi said:

supply the battery at the 0% VAT rate as part of a "supply and fit" contract.

Think you either have to expect the following 

1. MCS uplift in prices for everything then a vat reduction - overall expensive cost.

2. Buy it all yourself, pay the vat, either install yourself or get your local electrical guy to do it. Lower cost overall.

 

I would leave original install untouched. Do the battery AC coupled then it's a stand alone job no scary PV involved for you electrician.

On 09/04/2026 at 18:22, Bosi said:

Hi everyone,

I’m looking for an MCS-certified electrician or solar installer to help me with a battery retrofit for my existing solar system here in LS11.

I am planning to add a Fogstar Energy ECO 16.1kWh battery. I would like the installer to supply the battery at the 0% VAT rate as part of a "supply and fit" contract.

I already have a used Solis inverter which I will provide for the installation. I’m happy to handle some of the cable prep/routing beforehand to save time, but I need a professional to handle the high-current connections and provide the necessary safety certifications.

If you’re a local installer or can recommend someone reliable who is comfortable working with customer-supplied inverters, please get in touch with a rough quote or to arrange a quick look at the site.

Thanks!

Does this have a FIT agreement on it?