EG4 Systems Designed and Installed for Michigan Homes
Strawberry Solar designs and installs EG4 solar and battery systems across Michigan’s Lower Peninsula, including FlexBOSS hybrid inverters, the GridBOSS, and WallMount batteries. If EG4 is already on your shortlist, the decision left is who designs and installs it, and that is the work we have been doing for Michigan homes since 2010.
We build every EG4 system around your home: what you want running during an outage, how long it needs to last, and what your DTE Energy or Consumers Energy bills say you actually use. Then we handle the permits, install it, and support it once it’s running.
Certified EG4 Installer
Pearl Certified
Michigan Saves Authorized
BBB Accredited
Trusted Since 2010
Your home during an outage
Grid down
Furnace blower
On battery
Well pump
On battery
Refrigerator
On battery
EV charger
Paused by smart port
Water heater
Paused by smart port
Power from: WallMount batteries + solar, managed by GridBOSS
Illustration only. Smart ports can pause heavy loads like an EV charger or water heater during an outage so your batteries last longer.
16 kW
Continuous output on the FlexBOSS21 with solar, and 12 kW from batteries alone
200A
GridBOSS service entrance rating, with a 125A generator port
14.3 to 16 kWh
Per WallMount battery, depending on the model
10 years
Standard EG4 warranty on the FlexBOSS21, GridBOSS, and WallMount batteries
Sources: EG4 FlexBOSS21, EG4 GridBOSS, EG4 WallMount All Weather, EG4 WallMount 314Ah Indoor.
Why Michiganders Choose Strawberry Solar for EG4
When you work with Strawberry Solar, one Michigan team designs your EG4 system, permits it, installs it, and supports it once it’s running.
Designed to EG4’s listed configurations
EG4 lists specific inverter and battery pairings under UL 9540, the energy storage safety standard local inspectors may ask to see. We design to those listed pairings and manage the full permitting process on your behalf.
Built around how your home uses power
We aren’t tied to or paid to install any manufacturer, so the design starts with the loads you need covered. When EG4 fits, we build around it. When a different battery or inverter suits your home better, we’ll tell you why.
Two warranties, kept separate
EG4 covers its equipment under its own manufacturer warranties, 10 years standard on the FlexBOSS21 and GridBOSS. Strawberry Solar backs the installation itself with our own 10-year workmanship warranty.
Support after the install
We offer ongoing monitoring, troubleshooting, and support once your system is running with our system diagnostics. When something needs attention, you call a Michigan team that knows your installation.
Financing through Michigan Saves
As an authorized Michigan Saves contractor, we can help eligible homeowners explore financing for qualifying solar installations. Battery storage may also qualify when paired with an eligible solar PV system. Current state and utility programs are listed on our solar incentives page.
Installing in Michigan since 2010
We work from our headquarters in Detroit, and every EG4 project runs through our solar installation process, from design through permitting and switching the system on.
What Goes Into an EG4 System
Most EG4 systems we design are built from three pieces of equipment: a hybrid inverter, a battery bank, and in many homes the GridBOSS.
The Hybrid Inverter
The FlexBOSS21, FlexBOSS18, and 18kPV are all-in-one hybrid inverters. One unit converts your solar power, charges and discharges your batteries, and runs your home from the grid or from storage, so there is no separate solar inverter and battery inverter on the wall. All three run on a 48-volt battery bank.
The GridBOSS
The GridBOSS is EG4’s microgrid interconnection device, the piece that decides where power goes. It is rated as a 200A service entrance, connects up to three EG4 hybrid inverters, and brings a generator, heavy household loads, and existing solar into the same system. When the grid drops, it moves your home to battery and solar power with a transfer time of about 25 milliseconds.
Not every EG4 system needs one. We will explain during design whether yours does and what it adds.
WallMount Batteries
EG4’s WallMount batteries use lithium iron phosphate (LFP) cells, a chemistry known for long cycle life and thermal stability. The All Weather models carry an IP65 rating for outdoor mounting and heat themselves in freezing temperatures. The Indoor models go in a protected space like a basement or utility room. Each battery provides 14.3 kWh (280Ah All Weather) or 16 kWh (314Ah models) of nominal storage capacity, with usable energy varying based on depth of discharge and operating conditions, and batteries connect in parallel to build a larger bank.
Power to your home runs through the GridBOSS, while the inverter handles charging and discharging the batteries. The dashed boxes are optional sources: a generator on the GridBOSS generator port, and solar you already own connected through AC coupling.
You see the whole system in the EG4 app: what your panels are producing, how full your batteries are, and what your home is using.
Choosing an EG4 Inverter
The inverter sets how much your home can run at once. Three current EG4 hybrid inverters cover most residential designs, and your proposal names the exact model and the reason for it.
FlexBOSS21
- 16 kW continuous with solar, 12 kW from batteries alone
- Up to 21 kW of solar across 3 MPPTs
- Surge up to 24 kW for half a second to start motors
- 90A grid pass-through, built to pair with the GridBOSS
- NEMA 4X enclosure, rated -13°F to 140°F
FlexBOSS18
- 13 kW continuous with solar, 10 kW from batteries alone
- 18 kW of usable solar across 2 MPPTs
- 90A grid bypass, built to pair with the GridBOSS
18kPV
- 12 kW continuous output
- 18 kW of usable solar, 21 kW recommended maximum, across 3 MPPTs
- 200A AC bypass
- NEMA 4X / IP65 enclosure
Whole-Home Backup With GridBOSS
The GridBOSS supports a 200A service entrance and allows a home’s main electrical panel to be connected to backed-up power. During an outage, available power depends on the connected inverter capacity, battery bank, and solar production. Smart load management helps prioritize essential circuits and reduce demand from larger appliances. Three of its features do most of the work in a Michigan outage:
- Smart ports. Four configurable ports for heavy loads like an EV charger, central air, or an electric water heater. During an outage, those loads can be shed so your batteries last longer. We wire these alongside the home EV charger installations we already do.
- A generator port. A standby generator connects to its own 125A port and becomes another source the system manages, which helps when an ice storm keeps the grid down for days.
- Room for more inverters. Up to three EG4 hybrid inverters can connect to one GridBOSS, for larger homes or loads that run at the same time.
Sizing Your EG4 System
We start with two numbers: your peak load during an outage, which picks the inverter, and the hours of backup you want, which sets how many batteries go in.
Essentials backup
Refrigerator, furnace blower, sump pump, well pump, lights, and internet on a backed-up panel, with a smaller battery bank.
Whole-home backup
The house running close to normal through an outage, including central air, with a GridBOSS, a larger inverter, and more batteries.
Off-grid or long outages
A battery bank sized for a run of cloudy days, a generator for the longest winter gaps, and parallel inverters where the loads call for it.
Battery icons are illustrative and do not represent a runtime or a recommended quantity.
We size from your DTE Energy or Consumers Energy bills, or from a load estimate on a property with no utility service. We design around your energy needs and goals, and if another of the solar battery storage systems we install is a better match, we’ll recommend it.
Where EG4 Fits
New solar plus storage
Designing the panels, inverter, and batteries together lets us size a home solar installation and its backup around how your household uses power.
Adding storage to existing solar
The GridBOSS supports AC coupling, which may allow an existing solar array and compatible inverter to integrate with a new EG4 battery system. We confirm your existing system is performing properly and evaluate equipment compatibility before designing the batteries around it as part of our solar system expansion service.
Off-grid and rural properties
EG4 hybrid inverters run off-grid as well as grid-tied, which suits cabins, farms, and rural homes where a utility line extension costs too much. We size off-grid solar systems for the shortest days of the year, since that is when a bank and generator get tested.
How We Choose Equipment, and Why EG4 Makes the List
We are not tied to any manufacturer, so every system we design starts with your home rather than a product line. EG4 is one of the systems we install, and we recommend it where its strengths match the home: whole-home backup through the GridBOSS, smart load control for heavy appliances, generator pairing, large battery banks for long outages and off-grid properties, and adding storage to existing solar.
We only work with brands we trust and would install on our own homes. We do this to ensure that every customer is satisfied with their solar setup.
For other homes, a different system is the better fit. We also install Sol-Ark hybrid inverter systems, FranklinWH whole-home batteries, Tesla Powerwall, and Enphase, and we will walk you through why we are recommending one for your home.
Thinking About EG4 for Your Home?
Tell us what you want backed up, and we’ll design an EG4 system around it.
or call
Placing EG4 Equipment for a Michigan Winter
Cold matters for any lithium battery, because it has to stay warm enough to charge safely. EG4’s All Weather WallMount batteries include built-in heating to help maintain safe charging temperatures during freezing weather, subject to the battery’s operating limits and available energy. That heater draws power from the system (EG4 rates it at 448 W on the 314Ah All Weather model), so we account for its energy consumption when sizing a battery bank for Michigan winters.
The rest of the equipment is rated for Michigan conditions too. The GridBOSS is rated from -40°F to 113°F, and the FlexBOSS21 from -13°F to 140°F. Indoor batteries go in a protected space, and we plan where every piece mounts as part of the design.
Getting More From Your Solar Under Michigan Billing
DTE Energy and Consumers Energy bill solar customers under distributed generation. Power you pull from the grid (inflow) costs your regular rate, and extra solar you send back (outflow) earns a credit below what you pay for power you buy.
A battery bank closes some of that gap. Instead of sending midday solar out at the lower credit, an EG4 system can store it and run your home on it in the evening, and EG4 inverters include preset modes for self-consumption and nighttime battery use.
Inflow
Power you buy, at your regular rate
Outflow
Solar you export, credited lower
Stored
Solar you keep and use at night
EG4 FAQs
It depends on what you want backed up. An EG4 hybrid inverter can back up a panel of essential circuits on its own. The GridBOSS is what we add for whole-home backup at 200A, generator integration, smart load control, existing solar through AC coupling, or more than one inverter.
In many cases, yes. Through the GridBOSS, existing solar connects by AC coupling and keeps its current inverter. We check how your current system is performing before we design the battery side, including systems another company installed.
The All Weather WallMount is IP65 rated for outdoor mounting and heats itself in freezing temperatures. Indoor models go in a protected space. Because the heater uses stored energy, we size outdoor battery banks with winter in mind.
EG4 lists a 10-year standard warranty on the FlexBOSS21, FlexBOSS18, 18kPV, and GridBOSS. The 280Ah All Weather battery carries a 10-year warranty, and the 314Ah models carry 10 years or 10,000 cycles. EG4 equipment is registered through EG4’s warranty page. Strawberry Solar adds its own 10-year workmanship warranty on the installation.
It can, when the inverter is sized for it. Motors draw a surge when they start, and inverter surge ratings are built for that: the FlexBOSS21 can deliver 24 kW for half a second and 18 kW for one second. We design around the actual equipment in your home, including the starting draw of your well pump and air conditioner.
Ready to Have Your EG4 System Designed for Your Home?
Tell us about your home, what you want backed up, and any solar you already have, and we’ll design an EG4 system around it.
or call