Solplanet ASW1500S-S - hybrid, single-phase inverter 1.5 kW

Solplanet ASW1500S-S is the case when "small" does not mean "toy". A 1.5 kW inverter is taken when there is no point in chasing high power: a balcony power plant, a summer house, a utility room, a garage or the first stage of a home solar power plant, which is planned to be gradually expanded. And at the same time, it is a full-fledged hybrid, not just a network inverter - it can work in tandem with a battery through communication with its management system (BMS), and not just give solar energy to the network.

He lives on the street and doesn't make any noise.

The housing has an IP65 protection rating: dust is not terrible, water jets from any side are too. Therefore, the inverter is hung directly on the outer wall of a house or outbuilding, without a separate technical room - for a summer residence this is often a decisive argument. Cooling is natural convection, without a fan, and therefore without a characteristic hum: the noise level is declared as 0 dBA. The operating temperature range from −25 to +60°C covers any Ukrainian weather, from January frosts to July heat on the southern wall.

How much does he actually give?

Maximum efficiency — 97.6%, European (averaged over the real work profile) — 96.3%. For an inverter of this class, these are good numbers: conversion losses are minimal, and almost all the kilowatts produced by the panels reach the consumer. The harmonic coefficient THD is kept below 3%, so the equipment receives a pure sine wave without "dirty" voltage, which over time spoils the power supplies. MPPT voltage range — 80–550 V at one input, control and monitoring — via a mobile application and RS485/Wi-Fi interface, with the ability to connect all this to Home Assistant.

Practical nuance: how to count panels

Since there is only one MPPT input and the operating voltage range is 80–550 V, the panels in the string are connected in series and selected so that the total voltage is kept within these limits with a margin for daily and seasonal fluctuations. For typical 400–450 W modules, this is usually 3–4 pieces in a string. It is better to calculate the configuration before purchasing the panels: otherwise there is a risk that the modules already purchased simply will not fall into the operating voltage range. We at ComfortLife help with this calculation and will suggest compatible panels for a specific roof.

The protections in the inverter are standard for quality equipment: type III overvoltage, short circuit, reverse DC polarity, network surges. Weight 6.5 kg, dimensions 320×264×94 mm, manufacturer's warranty — 10 years.

What does 1.5 kW really give?

It is important not to have high expectations here. 1.5 kW is not about "powering the whole house from the sun", but about specific tasks: to relieve daytime consumption when the refrigerator and several sockets are working, or to maintain a small autonomous zone. If the goal is to completely close the energy consumption of the cottage, look towards more powerful models right away, because you can increase "up" from 1.5 kW only to a certain limit. But for a start, for a summer residence or in order to "try solar energy without large investments", this is perhaps the most sensible entry ticket. Connection to the existing house network is carried out via a regular AC connection, and the inverter itself does not require complex wiring.