How to Set Up a Level 2 Charger at Home With a Deye Battery and Inverter

If you're trying to figure out how to set up level 2 charger at home with a Deye battery and inverter, this checklist is for you. I manage purchasing and facilities coordination for a 400-person company. We've coordinated maybe 14 charger installations. No, 16 if you count the office wall units—I'm mixing it up with the Level 1 chargers. The point is, I've seen enough proposals and inspections to know where the same mistakes show up.

This short guide assumes you already have or are about to order Deye equipment. If you just want to charge a car and don't care about solar or backup, you might not need a battery. To be fair, a charger alone with off-peak rates can be the right answer. But if you're pairing a Deye battery and inverter with an EV charger, here's the order I use.

The six-step setup checklist

These steps are in order. Do not jump ahead to the charger before checking the inverter and battery.

Step 1: Confirm your Deye inverter is a hybrid or battery-ready model

Not every Deye inverter can accept a battery. Some are grid-tie only. If you want to charge from stored solar or use backup power, you need a hybrid inverter with a battery port. Deye's model numbers usually include 'HY' or 'SG' and say 'hybrid' in the datasheet. I want to say the SUN-8K-SG01LP1-EU was a common hybrid model in our 2024 vendor consolidation project, but don't quote me on that. Verify the current lineup on Deye's official site. (Note to self: always check the datasheet, not the marketing page.)

Checkpoint: The datasheet says 'hybrid' or 'battery-ready.' If it doesn't, you'll need an AC-coupled system or a different inverter.

Step 2: Size the battery for Level 2 charging power, not just capacity

People see '100Ah lithium battery 12V' and assume it can power a home charger. A 12V 100Ah lithium battery stores about 1.28 kWh. A Level 2 charger draws 7–12 kW. That 12V battery would be empty in under ten minutes if it could deliver that much current—which it usually can't. A Deye battery for home storage is different. It's a high-voltage stack with much higher continuous discharge current. Don't mix them up.

For a Level 2 charger, check three numbers:

• Charger draw in amps × 240V = continuous load in watts.
• Battery continuous discharge current × system voltage = available watts.
• Available watts must be higher than charger load plus other loads in the house.

If you're charging at 32A, that's 7.68 kW. The Deye battery stack has to deliver that plus your home's base load. The inverter's charge and discharge rating matters just as much as the battery's kWh number.

Step 3: Choose a hardwired charger or plug-in with load-shedding

I went back and forth between a hardwired Deye EV charger and a plug-in 14-50 unit for a week. Hardwired is cleaner and avoids a few code requirements. Plug-in is easier to move. Ultimately I chose hardwired for our home-charging pilot because a continuous 9.6 kW load shouldn't depend on a receptacle connection.

Whichever you choose, make sure the charger can communicate with the Deye hybrid inverter or is at least load-shedding capable. If the inverter is near maximum, you want the charger to throttle down instead of tripping the system.

Step 4: Check grounding and earthing before installation—this is the step people skip

From the outside, grounding looks like a wire attached to a copper rod. The reality is more involved: the earthing conductor should be sized to the overcurrent protection, neutral and ground must be bonded in the main panel and separated in any subpanel, and Deye equipment has specific grounding requirements in its installation manual.

In North America, NEC Article 250.122 sets the minimum equipment grounding conductor size for a circuit. A 60A circuit for a Level 2 charger needs a correspondingly sized ground wire—not whatever leftover wire the installer has in the truck. NEC Article 625 also requires EV supply equipment to be sized for the load. Verify current code requirements at NFPA.org before relying on my summary, and confirm the adopted edition with your local authority having jurisdiction.

Why do I put this so early? In our first site audit, the installer ran a 12 AWG ground on a 50A circuit because 'it's just a ground.' It failed inspection. Rework cost us two days and $500. Oh, and this matters even if your local inspector is lenient. An undersized ground can look fine until a real fault happens.

Checkpoint: If a quote doesn't include a grounding detail, ask for it. If the contractor says 'you don't need grounding,' walk away.

Step 5: Pull permits and get the hidden costs in writing

Every city I've dealt with requires an electrical permit for a new Level 2 charger circuit. Some installers leave permits out of the quote to keep the price low. That's the classic hidden-cost trick.

I've learned to ask 'what's NOT included' before asking 'what's the price?' The vendor who lists all fees upfront—even if the total looks higher—usually costs less in the end. Get the quote in writing with line items for permit, panel upgrade, trenching, haul-away, and inspection.

As of Q1 2025, permit fees in the markets I work in ranged from $50 to $400. Panel upgrades pushed some jobs by $2,000+. Verify current numbers with your building department before you budget.

Step 6: Set up charging schedules and monitoring

After installation, don't just plug in and leave it. A Deye hybrid inverter plus the Deye monitoring app lets you set charging windows. You can charge from solar surplus during the day or off-peak electricity at night. That's when the system starts paying for itself.

One of our vendor proposals described this with the phrase 'anytime fir ess.' I'm still not sure if that was a typo for 'anytime fitness' or 'anytime for less,' but the idea was right: a home EV charger with a battery lets you charge on your schedule, not the utility's. In the app, set a charge current limit that matches your panel and battery rating. If you have a 100Ah lithium battery 12V somewhere on the property, don't include it in this workflow; the home energy battery is separate.

Common mistakes to avoid

Assuming the battery will power the Level 2 charger when the grid is down. Hybrid inverters can operate in backup mode, but the backup output rating may be lower than the charger's draw. A 9.6 kW charger will drain a battery stack quickly. For outages, plan to power essential loads, not the car at full speed.

Skipping the inspection. An unpermitted install can void equipment warranties and create insurance issues. The inspector is not the enemy; they're the person who catches the problem before it becomes dangerous.

Mixing up 12V lithium batteries with home ESS batteries. A 100Ah lithium battery 12V is useful for an RV or a sump pump, but it is not a Deye home battery and will not run a Level 2 charger.

Accepting the first quote. I manage 60–80 orders annually, and I've learned that the lowest bid is usually missing something. Ask for three quotes, all with the same scope, and compare line by line.

Final note

This was accurate as of January 2025. Deye updates products, NEC rules change, and local inspectors interpret things differently. Verify current models, codes, and permit rules before you sign anything.

If you made it this far, you already know more than most people who start this project. Use the checklist, ask the uncomfortable questions, and get every fee in writing.