What precautions should I take before installing/adding Stackable Micro Battery?

When installing/adding expansion batteries, it is necessary to power off and shut down the system to protect yourself and the machine. Performing this operation while powered on is not covered under warranty. Please follow the steps below for proper installation: a. Disconnect the Micro Storage Unit and the solar panels. b. Press the on/off button for 2 seconds to turn off the power. c. After turning off the Micro Storage Unit, install the expansion batteries to the Micro Storage Unit. d. Connect solar panels for normal use.

Are there any other precautions that need to be taken when installing and using the product?

Ensure that the AC outlet is properly grounded.

Can I change the battery to the Micro Storage Battery or Stackable Micro Battery by myself?

No. If your battery in Micro Storage Unit or Stackable Micro Battery does not work or working conditions do not meet expectations, please contact the TSUN customer service team for further help.

How to make sure the equipment is safely grounded?

The included AC end cable already ensures that the machine is safely grounded, so there's no need to worry.

Are microinverters required to use Micro Storage Unit?

Micro Storage Unit does not require a microinverter. A microinverter is already incorporated into its all-in-one design that also includes a photovoltaic controller and energy storage battery pack.

Can the Micro Storage Unit charge batteries using the household power grid?

Yes, the Micro Storage Unit can charge your batteries using your home's AC power. It can be scheduled to do so during off-peak hours to reduce costs, and will also automatically charge AC power when the batteries are low and there is insufficient solar power, preventing battery damage and ensuring that you have some reserve energy available.

How do I use Micro Storage Unit to achieve zero-power function?

You need to buy our optional accessory smart meter, which prevents energy back-flow to the public grid by adjusting the output power of the Micro Storage Unit, matching household load in real-time. This achieves the purpose of not transmitting energy to the public grid, which is the anti-back-flow function.

How does the smart meter help Micro Storage Unit achieve zero energy waste?

The smart meter detects the total household electricity consumption, which lets Micro Storage Unit continually adjust output power. It's real-time and precise electrical discharge for your home, helping you achieve efficient energy use without waste.

Products Storage System Balcony Storage SolarTrunk MSU4000 Elite

SolarTrunk MSU4000 Elite

4 kWh battery, stack up to 5 units for 20 kWh
Up to 3.6 kW of appliances during a blackout
2.5 kW to the grid, up to 5,000 W of solar
4 independent MPPTs, 18 A each
Semi-Solid-State Battery — Extreme Safety, Ignition-Proof
<10ms Switchover
IP65 weatherproof,-20℃ to 55℃ Operating Temperature
Single- and three-phase parallel ready
2.4G & 5G WiFi, Bluetooth, RS485 Connectivity
Meter Compatibility: Shelly P1, French Linky & Other Leading Brands
10-Year Warranty

All-in-One Home Storage,

One box in your home,store by day, use by night, stay calm in a blackout.

SolarTrunk MSU4000 Elite — All-in-One Home Storage

home power battery storage

314 Ah LiFePO4 cells that last 10,000 cycles.

LFP chemistry doesn't run away thermally, and the BMS watches every cell — peace of mind for a decade.

(10,000 cycles measured at 25 °C down to 60 % capacity)

Blackout? The fridge keeps running.

Up to 3.6 kW off-grid — enough for the fridge, the washing machine and the microwave at once.

Note: that 3.6 kW is 2.5 kW from battery/PV plus 1.1 kW topped up from the grid, so it only applies while the grid is still connected. In a full outage you get up to 2.5 kW from battery and solar.

Plug your roof straight in.

Up to 5,000 W of solar across 4 MPPTs, 18 A each, for 8 to 12 panels.

East, south and west facing strings? One shaded by a tree? Each tracker finds its own sweet spot, so the others don't get dragged down.

home solar power storage

Need More? Just Add Another.

One host plus up to 4 battery packs — 5 units in total, 20 kWh of capacity.

Buy an EV or a heat pump later? Just add a battery pack. No need to replace the whole system.

hybrid micro inverter

Screenless Design, One Less Failure Point.

Removing the display eliminates the screen-failure risk from prolonged outdoor sun exposure, keeping the unit stable and reliable over the long run.

Panel: Flame-Retardant Composite Panel — More Beautiful, Better Insulated, Easy to Maintain.

hybrid microinverter

Single-phase or three-phase, it parallels.

Reversed PV terminals, PV overvoltage, DC or AC terminals in the wrong place — the unit catches it and protects itself.

Whether you DIY or hire an installer, that's peace of mind.

micro hybrid inverter

Wire it wrong and nothing bad happens.

Reversed PV terminals, PV overvoltage, DC or AC terminals in the wrong place — the unit catches it and protects itself.

Whether you DIY or hire an installer, that's peace of mind.

Mount it outside. Rain or snow, it doesn't care.

IP65 sealed against water and dust, working from -20 °C to 55 °C, up to 95 % humidity, up to 2,000 m altitude.

Garage, exterior wall, garden shed — put it where it suits you.

No fan, no noise.

It cools by natural convection, so it's fine in the living room, hallway or garage — you won't hear it at night.

Bonus: fans wear out. No fan, one less thing to fix.

When the grid drops, it's already switched.

Under 10 ms to switch over. Human reaction time is around 200 ms — so power is back before you notice anything.

Your computer won't reboot. Your router won't drop. The lights won't even flicker.

One box that charges and discharges.

Solar goes in during the day, comes back out at night. No extra inverter to buy — one device less, less money, one less thing to break.

home power storage

Charge when power is cheap, use it when it's expensive.

Works with dynamic tariffs: it watches the price, charges low and discharges high — real savings over a year. Some regions don't allow exporting to the grid, so switch on zero-export mode and you're still fine. Or schedule export to suit your routine.

home power storage system

Even from a total blackout, it wakes itself up.

Black start via PV or grid — no external power supply needed to kick it back to life.

That makes recovery after an outage a lot less painful.

Solar powers the house first.

In Power-Bypass mode, PV feeds your loads directly and only the surplus goes into the battery.

One conversion step fewer means less wasted energy — that's where the efficiency comes from.

Solar powers the house first.

In Power-Bypass mode, PV feeds your loads directly and only the surplus goes into the battery.One conversion step fewer means less wasted energy — that's where the efficiency comes from.

hybrid microinverter

Multi-Protocol Communication — Connect Anywhere.

Dual-band WiFi (2.4 & GHz): 2.4 GHz reaches further, 5 GHz is faster —install it where you want, not where the router is.No network at all? Connect straight from your phone over Bluetooth.Want it rock solid? Use RS485 over a cable.

micro hybrid inverter

Your Home Energy, Under Control.

Track energy flow, system status and historical data in real time on the app — manage your home energy anytime, anywhere.

Install it yourself, no pro needed.

Two holes in the wall, fix the bracket, hang the unit, plug in the supplied AC cable (2 m, or 5/10/15 m if you need longer) and the RS485 lead. Done.

No special tools needed—this will be taken care of in no time.

Frequently Asked Questions

What precautions should I take before installing/adding Stackable Micro Battery?

A :

When installing/adding expansion batteries, it is necessary to power off and shut down the system to protect yourself and the machine. Performing this operation while powered on is not covered under warranty. Please follow the steps below for proper installation: a. Disconnect the Micro Storage Unit and the solar panels. b. Press the on/off button for 2 seconds to turn off the power. c. After turning off the Micro Storage Unit, install the expansion batteries to the Micro Storage Unit. d. Connect solar panels for normal use.
Are there any other precautions that need to be taken when installing and using the product?

A :

Ensure that the AC outlet is properly grounded.
Can I change the battery to the Micro Storage Battery or Stackable Micro Battery by myself?

A :

No. If your battery in Micro Storage Unit or Stackable Micro Battery does not work or working conditions do not meet expectations, please contact the TSUN customer service team for further help.
How to make sure the equipment is safely grounded?

A :

The included AC end cable already ensures that the machine is safely grounded, so there's no need to worry.
Are microinverters required to use Micro Storage Unit?

A :

Micro Storage Unit does not require a microinverter. A microinverter is already incorporated into its all-in-one design that also includes a photovoltaic controller and energy storage battery pack.
Can the Micro Storage Unit charge batteries using the household power grid?

A :

Yes, the Micro Storage Unit can charge your batteries using your home's AC power. It can be scheduled to do so during off-peak hours to reduce costs, and will also automatically charge AC power when the batteries are low and there is insufficient solar power, preventing battery damage and ensuring that you have some reserve energy available.
How do I use Micro Storage Unit to achieve zero-power function?

A :

You need to buy our optional accessory smart meter, which prevents energy back-flow to the public grid by adjusting the output power of the Micro Storage Unit, matching household load in real-time. This achieves the purpose of not transmitting energy to the public grid, which is the anti-back-flow function.
How does the smart meter help Micro Storage Unit achieve zero energy waste?

A :

The smart meter detects the total household electricity consumption, which lets Micro Storage Unit continually adjust output power. It's real-time and precise electrical discharge for your home, helping you achieve efficient energy use without waste.