An app is a specification when it is the only display · review
A 30 A PWM controller with Bluetooth to a stated 30 metres, three-stage charge management, a low-voltage shutdown at 8 V and two weeks of stored performance data.
The bottom line The only controller here to publish a Bluetooth range and to retain a fortnight of data on the device. Its 8 V shutdown is presented as battery protection and is well below where a 12 V lead-acid battery needs protecting.
A 30 A PWM controller built around being left alone.
Up to 30 metres of Bluetooth, direct to the application. That is the figure that decides whether a controller in a shed at the end of a garden can be read from the house, and no other controller in this catalogue publishes one.
Two weeks of performance data retained on the device, and the last selected load mode remembered through a power interruption. Both matter on an installation nobody visits often: the first turns a monthly check into a record, the second means a reset does not undo a configuration.
The fourth bullet describes automatic shutdown when battery voltage falls below 8 V, presented as protecting battery life. For a 12 V lead-acid battery, harm begins well above that — the conventional floor under load is around 10.5 V. An 8 V cut-off protects the controller from operating without a usable supply; it does not protect the battery from deep discharge.
Full three-level PWM management is named in the third bullet, alongside six protections. That is the correct sequence for the lead, gel and lithium chemistries the fourth bullet lists.
The maximum PV input voltage, and the name of the application.
German, French, Italian and Spanish Amazon stores quoted 35 € to 40 € when this page was compiled.
British Amazon store carries it too, priced in its own currency, which the euro range above deliberately omits.
American Amazon catalogue carries an entry for it, with nobody selling.
These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.
Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.
| Charge current | 30 A, from the title, with two USB outputs at 5 V/2.5 A maximum |
|---|---|
| PV voltage | Nowhere in the listing — no maximum input voltage is published |
| Wireless protocol | Bluetooth with a stated range of up to 30 metres, second bullet |
| App features | Remote monitoring and control through a mobile application, second bullet; the application is not named |
| Offline behaviour | The controller shuts down automatically below 8 V battery voltage and stores the last selected load mode, fourth and fifth bullets |
| Accessories | Two USB outputs; no accessories are supplied |
| Stated firmware support | Nowhere in the listing |
| Amazon reference | B0FT2HV9S1 (same reference on 6 Amazon marketplaces) |
| EAN | 0810198852226 |
It stops the controller operating, which is what the listing says. For a 12 V lead-acid battery, 8 V is far below the point at which damage begins — around 10.5 V under load is the conventional floor. This is a controller limit rather than a battery protection, and the distinction matters.
A record the controller keeps itself, readable when you next connect. On an installation visited monthly, that is the difference between knowing what happened and knowing what is happening now.
30 A rated, 20 A operating · 80 V maximum PV · Bluetooth and WiFi · mobile app monitoring · offline behaviour not described · USB 5 V/1 A · firmware support not stated
A 30 A PWM controller with both Bluetooth and WiFi, a published 80 V PV ceiling, and separate rated and operating currents of 30 A and 20 A.
Best for: A 36 V bank where the PV ceiling is the constraint and remote monitoring is wanted over two protocols.
≈ £39 / €30
tank not published · 3100 W, 230 V 50 Hz sine from a microprocessor-controlled inverter module · transfer time not applicable · 16 A socket, 2 USB at 5 V/1 A and 5 V/2.1 A · petrol or LPG, everything for gas supplied · 63 dB Lpa at 7 m, distance STATED · outdoor machine, manual governs
A 3100 W dual-fuel inverter generator supplied with everything needed to run on LPG, quoted at 63 dB Lpa at 7 metres, with parallel cables included and an eco mode saving up to 50 % of fuel.
Best for: A household backup kept for years between uses, where bottled gas avoids stale petrol.
≈ €699
tank 5.6 l · 1800 W continuous, 2000 W peak, pure sine · transfer time not applicable — a generator, not a UPS · 230 V socket, USB-A, USB-C, 12 V DC · petrol, parallel operation with a second unit · 45–50 dB at about 7 m, distance STATED · outdoor machine, manual governs
A 2000 W peak inverter generator with a 5.6 litre tank, up to six hours in eco mode, parallel operation with a second unit, and a noise figure published with its distance.
Best for: A camping pitch or a garden where noise at the boundary is the constraint.
≈ €349
