Growatt’s SPF 5000 ES packs a 5,000W pure sine wave inverter, a 6,000W solar charger and an 80A grid charger into one wall-mounted box. According to Growatt’s May 2024 datasheet and its user manual, the 48V off-grid unit accepts up to 450V of solar open-circuit voltage, surges to 10,000VA, runs with or without a battery, and can be paralleled up to six units, or 30kW, in single-phase or three-phase setups. Here’s what those specs mean in practice, how the key settings work, and who the SPF 5000 ES suits best.
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I haven’t tested the SPF 5000 ES myself. Every spec below comes from Growatt’s SPF 3000-5000 ES product page, its datasheet and its user manual (SPF 3500-5000 ES, EN 202109). Worked examples are labelled as estimates.
SPF 5000 ES at a glance
| Spec | Growatt SPF 5000 ES |
|---|---|
| Rated output | 5,000VA / 5,000W, pure sine wave |
| Surge | 10,000VA (2x rated power for 5 seconds, per the manual) |
| Output voltage | 230VAC ±5% |
| Battery voltage | 48VDC, lithium or lead-acid |
| Max PV array power | 6,000W |
| PV open-circuit voltage (max) | 450VDC |
| MPPT operating range | 120–430VDC, one tracker, 150V start-up |
| Max PV input current | 22A |
| Max solar charge current | 100A |
| Max AC charge current | 80A |
| Peak efficiency | 93% (inverter); over 95% in line mode |
| Transfer time | 10ms typical, 20ms max (single unit) |
| No-load consumption | Under 60W |
| Parallel | Up to 6 units (30kW), single- or three-phase |
| Enclosure / size / weight | IP20, 330 x 485 x 135mm, 12kg |
| Operating temperature | 0°C to 55°C |
What makes it stand out
High-voltage solar input
The 450V open-circuit limit lets you wire panels in long series strings. Higher voltage means lower current on the run from the array, so you can use thinner PV wire over longer distances. Growatt recommends 12 AWG for the PV connection. One MPPT tracker takes one string, up to 6,000W of array power.
Runs with or without a battery
Growatt says the SPF 5000 ES can work without batteries, using solar and grid power together to run loads. That’s useful if you want to start with panels and add storage later. Note that parallel operation requires a battery: the manual says the six-unit parallel feature works “only with battery connected.”
Lithium communication built in
The BMS port supports CAN and RS485. In Program 05 you set the battery type to “LI,” and the unit jumps to Program 36, where you choose a protocol: L01–L50 for RS485 or L51–L99 for CAN. Growatt asks owners to contact it to choose the protocol that matches their battery. For example, EG4 lists Growatt among the inverters its LifePower4 V2 can talk to over RS485. See our EG4 LifePower4 V2 DIP switch guide.
Scales to 30kW
Six units can run in parallel on one phase, or work together to supply three-phase equipment with up to four units on any one phase. Growatt notes that if your package doesn’t include the parallel and current-sharing cables, you’ll need its parallel kit.
Output source priority: the setting that matters most
Program 01 controls where your loads get power. Growatt offers four modes:
| Mode | How it works (per Growatt) | Good fit |
|---|---|---|
| Utility first (default) | Grid powers loads; solar and battery step in when grid is unavailable | Backup-focused setups |
| Solar first | Solar powers loads first, then battery or grid when solar is short | Daytime self-consumption |
| SBU priority | Solar, then battery, then utility once the battery falls to its set point | Maximizing your own solar and storage |
| SUB priority | Solar first, then solar plus utility together; battery only when solar is short and grid is gone | Keeping the battery full for outages |
In SBU or Solar first mode with lithium, Growatt lets you set the SOC at which it switches back to the grid (default 50%, settable 6–95%) and the SOC at which it returns to battery (default 95%, settable 10–100%). The low DC cut-off SOC defaults to 20% and can be set from 5% to 50%.
Charging settings: Programs 02 and 14
Charging has two settings. Program 02 sets the maximum combined charge current from solar and utility. On the SPF 5000 ES it defaults to 60A and can be set from 10A to 100A. If you select lithium in Program 05, the battery’s BMS controls charge current and this setting is locked. Program 14 sets charger source priority:
| Charger source option | Behavior (per Growatt) |
|---|---|
| Solar first | Solar charges the battery first; utility charges only when solar isn’t available |
| Solar and Utility | Both charge the battery at the same time |
| Only Solar | Solar is the only charger, whether or not utility is available |
Growatt notes that in Battery mode or Power saving mode, only solar can charge the battery. For lead-acid banks, the manual lists a 3-step charge with bulk voltage of 58.4V for flooded and 56.4V for AGM/gel, and a 54V float. It recommends a lead-acid charge current of about 0.2C, or 40A for a 200Ah bank.
A typical off-grid day: how the modes play out
Illustrative scenario based on the settings above, not a test. With Program 01 on SBU and Program 14 on Solar first, the morning sun first covers your loads, and any surplus charges the battery. If clouds roll in, the battery picks up the slack. After sunset the battery runs the house until it falls to your switch-back point (50% SOC by default). The grid or generator then takes over the loads. Because Solar first lets utility charge the battery when solar isn’t available, the bank can also refill from the grid or generator overnight. If you’d rather save the battery for solar only, set Program 14 to Only Solar, and the bank will wait for sunrise.
Install checklist from the manual
| Connection | Growatt’s recommendation for SPF 5000 ES |
|---|---|
| Battery cable | 1 x 2 AWG, terminal torque 2–3 Nm |
| Battery breaker | 150A / 60VDC per inverter |
| Minimum battery size | At least 200Ah suggested |
| AC input/output cable | 1 x 8 AWG, torque 1.2–1.6 Nm |
| AC input breaker | 50A for one unit (100A for two in parallel, up to 300A for six) |
| PV cable | 1 x 12 AWG, with a separate DC breaker between array and inverter |
| Lithium BMS | RJ45 cable pin-to-pin from battery to the inverter’s BMS port |
Growatt says all wiring must be done by qualified personnel. Our wire gauge chart explains why 48V systems can use smaller cable than 12V ones at the same power.
Sizing a solar string: a worked example
Estimate, for illustration only. Take a panel with a 49V open-circuit voltage. Nine in series is 441V, just under the 450V limit at standard test conditions. But Voc rises in cold weather, so most installers would stop at eight (392V). That stays above the 150V start-up voltage and inside the 120–430V MPPT window. Panel current must also stay at or below the 22A input limit. Use your panel’s datasheet and the record low temperature at your site to confirm, and read our solar panel specs guide for how Voc and temperature coefficients work.
Battery bank: what 200Ah gets you
| Battery bank (48V class) | Approximate energy | Hours at 1,000W average load (estimate) |
|---|---|---|
| 1 x 51.2V 100Ah LiFePO4 | ~5.1kWh | ~4 h |
| 2 x 51.2V 100Ah (200Ah, Growatt’s suggested minimum) | ~10.2kWh | ~8 h |
| 3 x 51.2V 100Ah | ~15.4kWh | ~12 h |
The estimates assume an 80% usable window with a 20% cut-off and about 93% inverter efficiency, and they ignore idle draw. Growatt lists idle consumption at under 60W, which is up to about 1.4kWh a day if the inverter runs around the clock. Our guide to inverter efficiency and idle draw explains why that matters for off-grid budgets.
Who it’s for
- Off-grid cabins and homes in 230V regions that want one box for inverter, solar charging and grid or generator charging.
- Owners with long array runs who benefit from the 450V PV input.
- Systems that may grow, from one unit up to six in parallel.
- Lithium users whose battery supports a Growatt CAN or RS485 protocol.
Growatt specifies 230VAC output, and the manual documents single-phase and three-phase parallel setups. If your home runs 120/240V split phase, check with Growatt for a model built for that service. See our guide to grid-tie vs hybrid vs off-grid to choose the right system type.
SPF 5000 ES vs SPF 3500 ES
| Spec | SPF 3500 ES | SPF 5000 ES |
|---|---|---|
| Rated power | 3,500W | 5,000W |
| Surge | 7,000VA | 10,000VA |
| Max PV array | 4,500W | 6,000W |
| Max solar charge | 80A | 100A |
| Max AC charge | 60A | 80A |
| Weight | 11.5kg | 12kg |
Both share the 450V PV input, the 120–430V MPPT range, 48V battery and six-unit parallel support. For half a kilo more, the 5000 ES adds 1,500W of output and 1,500W of solar input.
FAQ
Can the Growatt SPF 5000 ES work without a battery?
Yes. Growatt says it can run without batteries, with solar and grid power supplying loads together. Parallel operation needs a battery connected.
What battery voltage does it use?
48V nominal, with lithium (with BMS communication or a user-defined profile) or lead-acid (AGM, flooded) settings.
How many solar panels can I connect?
Up to 6,000W of array power on one MPPT input. Keep the string’s cold-weather open-circuit voltage below 450V and the current at or below 22A.
Is it a hybrid grid-tie inverter?
No. Growatt lists it in its off-grid SPF line. It accepts grid or generator power as an AC input, for charging and pass-through to loads, rather than exporting solar to the grid.
How long does it take to switch to battery?
Growatt specifies 10ms typical and 20ms max for a single unit, and under 30ms in parallel.
Can I monitor it from my phone?
Yes, with Growatt’s optional plug-in ShineWiFi-F or ShineGPRS-F module and Growatt’s monitoring platform.
Verdict
On paper, the Growatt SPF 5000 ES is a strong all-in-one off-grid inverter for 230V systems. You get 5,000W of pure sine output, a 6,000W/450V solar charger, an 80A grid charger, broad lithium protocol support and room to grow to 30kW. Plan the battery bank (at least 200Ah per Growatt), budget for its idle draw, and size your strings for cold-weather Voc. For a broader planning walkthrough, see our off-grid solar system for home guide and the 12V vs 24V vs 48V explainer.